Nowadays, when we think about mobile phones and smartphones, the first thing that comes to mind is Android or iOS, the two giants that dominate practically the entire market. However, there is a whole alternative world of mobile operating systems Although they are less well-known and are available on fewer devices, they offer very interesting solutions for those looking for something different from the usual.
Let's explore all those mobile operating systems in depth. that are neither Android nor iOSWe'll review everything from open-source projects and Linux-based environments to proprietary developments from tech companies seeking their place in the industry. We'll talk about their history, their main featuresWe'll explore their advantages and limitations, and analyze to what extent they can be viable alternatives to the two dominant players. We'll also integrate key concepts such as privacy, personalization, sustainability, and application compatibility, so you have a comprehensive overview before considering making the switch.
The current situation: Why is it so difficult to compete outside of Android and iOS?
Before we dive into alternative systems, it is helpful to understand Why is it so difficult for other systems to gain a foothold? in the mobile market. There are technical, commercial and also cultural reasons that explain the current duopoly.
The first reason is technical: the vast majority of smartphones use ARM processors and, unlike the PC world (with x86, where there are many standards), deployment on ARM usually requires highly customized system images This is due to locked bootloaders, kernels modified by each manufacturer, and specific hardware support (modems, cameras, sensors, security chips, etc.). This severely limits compatibility and makes it difficult to create a universal platform that works on any device.
In addition, many manufacturers integrate locked bootloaders These restrictions prevent the installation of alternative ROMs or operating systems without following specific procedures. Even when unlocking is possible, features such as security certification (for example, for mobile payments) are often lost, the warranty is voided, or the device risks becoming unusable if something goes wrong during installation.
The second reason is cultural and commercial: users are very accustomed to using the most popular applicationsMany of these are proprietary, such as WhatsApp, Instagram, TikTok, YouTube, banking services, or official government apps. These applications often depend on Google Mobile Services or very specific APIs, so they cannot always be executed in alternative systems or they do so with limitations.
This dependence on certain apps and services means that, even though other operating systems exist, not be viable for the general publicFor the average user, not being able to install their banking app, not receiving push notifications from their social networks, or not being able to use WhatsApp officially is a difficult obstacle to overcome, however interesting the system may be from a technical standpoint.
In addition to all this, Android and iOS have well-established ecosystemsCentralized app stores, integrated payment systems, cloud services, cross-device synchronization, automatic backups, and massive developer support make these platforms a top choice due to their global reach. Competing against this network effect is extremely difficult for any alternative.
Linux-based mobile operating systems (other than Android)
A good part of the Alternatives to Android and iOS are based on LinuxAlthough they have different objectives, interfaces, and approaches, some focus on extreme privacy, others on the convergence of mobile and desktop, and still others on extending the lifespan of devices. Below, we present the most prominent ones and their main features.
Sailfish OS
Sailfish OS It is one of the most solid exponents of the alternative scene. It was born as the successor to MeeGo, the system that Nokia and Intel developed back in the day, and has achieved a certain level of maturity. Its interface is based on Qt (like KDE) and uses Wayland for graphics management, which allows it to offer smooth animations and a modern compositing system.
Originally, Sailfish was only available for Jolla Phones, but today it can be installed on various models, especially Sony (Xperia family), using adapted images. Its navigation is based on touch gestures Very fluid, with a minimalist approach: swipe to switch applications, close, access menus, etc., giving it its own identity compared to more classic interfaces.
Among its main strengths are: the focus on security and the ability to run android apps through an optional compatibility layer. This allows, in many cases, the installation of apps that do not exist natively for Sailfish, thus reducing one of the major barriers to entry for alternative systems.
The latest relevant version, Vanha Rauma 4.4, was released in 2022 The project continues to receive improvements in stability, hardware support, and developer tools. Despite this, its community remains relatively small, and the number of officially supported devices is limited, which is typical for projects of this kind.
For advanced users interested in a modern system, with European rootsWith its gesture-based interface and partial Android compatibility, Sailfish OS is a particularly attractive alternative, although it does require a certain degree of experimentation.
Ubuntu Touch
Ubuntu Touch It was born with the ambitious goal of offering the famous convergence between mobile and desktop: a single device that, connected to a screen and a keyboard, could behave like a complete computer. Canonical, the company behind Ubuntu, initially spearheaded the project, but decided to abandon it. Far from disappearing, the community UBPorts He took over and continues to actively develop it.
It is a completely independent system from Android, designed for both phones and tablets, with continuous improvements to its app ecosystem (called scopes and applications based on open technologies) and in its interface. The system uses its own graphical layer based on Ubuntu technologies, and leverages previous desktop experience to offer a relatively familiar environment to those already using GNU/Linux.
Although its evolution is slower than many would like, Ubuntu Touch remains a very interesting option for those looking for a truly free mobile experience and aligned with the spirit of GNU/Linux. True convergence still presents challenges, but it is already possible to use some devices as simple workstations by connecting them to a monitor and peripherals.
Regarding apps, Ubuntu Touch focuses on web-based applications and adapted containers, and boasts an active community that develops messaging, navigation, multimedia, and productivity tools. However, the absence of official apps This remains the biggest weakness of many popular platforms. If you'd like to explore other alternatives, you might be interested in our section on Comparisons of free mobile systems.
postmarketOS
postmarketOS goes a step further in the open source philosophy: its main objective is extend the useful life of mobile phonescombating the planned obsolescence that prevails in the sector. It presents itself as a Genuine Linux distribution for phones, capable of being installed in older models that have become outdated for the official systems of the manufacturers.
The central idea of PostmarketOS is to offer up to years of extended support For devices that no longer receive official updates, it repurposes smartphones that would otherwise end up in a drawer or a landfill. It is based on Alpine Linux, a lightweight and secure distribution, and allows users to choose from several interfaces (Plasma Mobile, Phosh, Sxmo, among others), adapted to touchscreens.
PostmarketOS is being developed in a completely open-source manner, although the list of compatible devices is still limited and the level of support varies: some models allow only basic functions, while others can function as... everyday mobile phoneswith relatively stable calls, mobile data, and essential apps.
One advantage is that the project aims to work not only on mobile devices, but also on... ARM laptops like the PineBook Pro and devices like the PinePhone. If you have a PinePhone or Librem 5 mobile phone, you're much more likely to enjoy it without problems, since they are devices designed specifically for this type of system.
PureOS
PureOS This is the offering from Purism, a company known for its unwavering commitment to free software and respect for user privacy. This system includes no proprietary components, not even at the firmware level, which has led to its recognition by the Free Software Foundation as completely free.
It is designed to work on its own devices, such as the By 5Although it can also be used in other environments (including x86 PCs). On mobile devices, it relies on interfaces like Phosh (GNOME adapted for touchscreens) to offer a consistent and simple environment, intended for users who want full control over your software and its hardware.
Among its strengths are the privacyPureOS emphasizes convergence and code purity. It integrates mechanisms to limit data collection and physical hardware locks (switches for camera, microphone, or connectivity), strengthening security against attacks and tracking.
On the other hand, it has a very limited ecosystem of dedicated mobile applications and relies heavily on the active commitment of its users. Often, users have to resort to desktop applications adapted for small screens or web-based solutions, making it a system better suited to technical profiles or those committed to free software than to the average user who simply wants everything to work effortlessly. If you want to delve deeper into how to improve privacy on Linux devices and protection methods, there are specific guides that explain best practices and recommended tools.
Mobian
Mobian It's another Debian-based system, adapted for mobile devices from the desktop experience of one of the most classic Linux distributions in the world. It uses the interface phosh (created by Purism), the Phoc compositor and GNOME's own technologies, giving it a robust and well-known foundation in the desktop environment.
Support is focused on models like the OnePlus 6, the PinePhone, the PineTab, and the Librem 5, although there is an experimental image for x86_64 and ARM laptops. This allows experimentation with Full Linux in your pocket, with access to the Debian package ecosystem, adapted for touch use as much as possible.
Mobian offers access to browsers such as Chromium, Firefox ESR or GNOME Web, as well as apps such as Telegram Desktop or Google Maps (via web). The variety of native mobile applications is still limited, which may pose an obstacle for some users who depend on very specific apps, but for those who are comfortable with web solutions or adapted desktop applications, it is a surprisingly complete environment.
Mobian's philosophy focuses on providing mobile phones with the same flexibility and control that Debian offers on computers, with regular updates, extensive repositories, and a focus on stability rather than visual appeal.
Tizen
Tizen It's a curious case within the landscape of Linux-based mobile systems. Developed by Samsung under the auspices of the Linux Foundation, it was intended to be a major asset for distance yourself from Android on mobileBut it has finally become established in other sectors such as smart TVs and wearables.
Smartphones with Tizen were a rarity and their success was Pyrrhic, especially in markets outside of Asia, due to the shortage of applications and limited developer support. Even so, the system allows certain Android applications to run through compatibility workarounds, and its code is partially open source, although the SDK contains proprietary Samsung components.
Tizen is still alive mainly thanks to its implementation in Smart TVs and smart watcheswhere it has achieved good integration with Samsung services, smooth performance, and a highly polished user experience. Its presence on mobile devices, however, is practically negligible, positioning it more as an embedded platform than a direct competitor to Android and iOS.
Other Linux alternatives for mobile devices
- AsahiLinuxA project to port Linux to Apple Silicon processors, although currently focused on computers. It's an example of how the community works to bring Linux to all types of architectures, something that in the medium term could also benefit the mobile environment.
- PINE64 and PinePhoneARM devices with support for various mobile Linux distributions, ideal for testing alternatives such as Mobian, PostmarketOS, or Manjaro ARM. These devices are specifically designed for... experimentation with free systems, with unlocked bootloaders and extensive documentation.
HarmonyOS: Huawei's bet
Following US sanctions, Huawei accelerated the development of HarmonyOSHarmonyOS, its own operating system designed to run on all kinds of connected devices (mobile phones, tablets, watches, home appliances, connected cars, and Internet of Things devices). Although the company promised a completely new platform, evidence has been found that HarmonyOS reuses much of Android's code, to the point that many analysts consider it a bifurcation or “fork” Android with its own layer.
HarmonyOS is based on an architecture oriented to microkernel and distributed servicesThis theoretically allows different devices to share resources and applications without the user having to worry about which hardware is running each task. This "super device" concept is one of its major selling points: the ability to manage mobile phones, tablets, televisions, watches, and other gadgets from a single integrated interface.
In China, Huawei phones run HarmonyOS as their main operating system, while in the international market they continue to use EMUI (a skin on top of Android, but without Google services). Their own app ecosystem (Petal Search, AppGallery, maps, cloud services, etc.) is growing, although support for international applications and third-party services It remains an outstanding challenge outside the Chinese market.
For users, HarmonyOS offers a very similar experience to Android in terms of interface, notification management, and settings options, making the transition easier. However, the absence of Google Play and Google Mobile Services forces users to resort to alternatives such as own app stores, installation of APKs from external sources or the use of web services, with the security and compatibility implications that this entails.
HarmonyOS represents the most serious attempt outside the West to create a mainstream alternative that doesn't depend directly on Google or Apple, and given its corporate strength, it could evolve significantly in the coming years. However, its current focus is closely tied to the Huawei ecosystem, so it behaves more like a own garden as a universally installable alternative system on any smartphone.
Android layers and variants: real alternatives or more of the same?
Most manufacturers customize Android with their own layers or forks, but except in very few cases, These layers still depend on the Android core and its main services.They are not completely different systems, but rather variations on the same basis.
Next, we review the best-known ones, although it should be made clear that they are not independent operating systems, but deep Android customizations that modify the interface, pre-installed apps, and additional services:
- One UI (Samsung)Advanced customization with many proprietary apps and exclusive features. One UI reorganizes the interface to be more accessible with one hand, incorporates tools like Samsung DeX (desktop mode when connecting the phone to a screen), and adds security layers like Knox, designed for corporate environments.
- MIUI and HyperOS (Xiaomi)MIUI has traditionally been very popular for its extensive customization options, themes, additional tools, and a design partly inspired by iOS. HyperOS arrives as an evolution focused on integration between mobile phones, tablets, watches and home deviceswith a greater focus on connectivity and, according to the brand, improved resource management. To expand your knowledge, you can also consult our guide on these layers.
- ColorOS (OPPO), OxygenOS (OnePlus), Realme UI (Realme), Funtouch OS (Vivo)These are Android interfaces that share many elements due to belonging to the same parent company, although each has its own visual style and unique features. ColorOS and Realme UI focus on advanced customization and camera functions, OxygenOS became famous for its near-stock Android feel and fluidity (although it has been moving closer to ColorOS), and Funtouch OS offers a distinctive look with numerous configuration options.
- MagicOS (Honor)A variant focused on Honor's identity, also based on Android. It includes its own services, an app store, optimization tools, and features inspired by EMUI, but adapted to the brand's new independent phase.
- Nothing OS (Nothing): Focus on simplicity and experience “Almost pure Android”However, it features some distinctive touches and its own visual identity based on elements such as the lighting effects of its mobile devices (Glyph Interface). It offers few additional apps and focuses on smooth performance and a polished design.
In all these cases, we are talking about systems that, although they offer interface differences, extra functions and their own ecosystem, They are still Android at their coreThey share the same permissions model, the same compatibility with Google Play (except for restrictions such as those of Huawei in certain markets) and the same technical foundations.
The "leap" to truly different systems only occurs with those we mentioned earlier: those that change the kernel, the graphics stack, the main app store, and the way of interacting with the hardware, or that, even while based on Android, They completely eliminate Google services and they advocate a radically different philosophy.
Alternative ROMs based on Android Open Source Project (AOSP)
There are many custom ROMs for mobile phones, based on the Android Open Source Project (AOSP). Although they are essentially still Android, they completely remove Google services and offer a much more controlled experience. privacy and personalization.
These ROMs allow, among other things, revive old phones They no longer receive official updates, are free of bloatware imposed by some manufacturers, and can be tailored to the exact needs of advanced users. In return, they require technical knowledge for installation and pose certain security risks if not configured correctly.
LineageOS
The most famous of all is LineageOS, heir to the legendary CyanogenMod. This ROM focuses on respect for privacy and access to free softwarewhile maintaining an appearance and functionality very close to what is usually called "pure Android".
LineageOS is compatible with a wide range of devices from brands like LG, Nokia, Google Pixel, OnePlus, Samsung, Xiaomi, and Sony, making it the go-to solution for those looking to extend the lifespan of their phone. Its lightweight architecture allows revive old phones which would otherwise become obsolete, and it usually receives security patches more regularly than many official firmwares that have already been abandoned.
Among its most valued features are the data traffic controlThe option to install Google Play apps (via packages like GApps) and advanced system customization options are also included. While it's possible to install official Google apps or apps from the Play Store, some may not function correctly if they rely on specific APIs or security certifications.
Furthermore, LineageOS publishes transparent information about the status of its servers, available builds, and supported devices, giving extra confidence to those who decide to venture into an alternative ROM.
/ e / OS
Based on LineageOS, / e / OS radically bets on eliminate dependence on GoogleIts goal is to offer a "de-Googled" mobile ecosystem, in which no system component automatically sends data to the company's servers.
/e/OS includes its own app store called App Loungewhich allows you to install apps from the Play Store, alternative repositories, and open source, with the option to filter by open source appsEach application receives a kind of "privacy score", based on the permissions it requests and the trackers it integrates, so that the user can make a more informed decision about what to install.
In addition, it integrates an advanced tool called Advanced Privacy This tool blocks tracking attempts and protects user data in real time. For example, it allows users to: obfuscate the IP address, slowing down or blocking requests to certain tracking domains and providing fake locations to apps that don't need to know the user's exact position.
/e/OS also proposes a complementary ecosystem of cloud services (email, calendar, storage, contacts) as alternatives to Google's, based on free software and hosted on servers controlled by the project. In this way, it seeks to offer a full independent experience of the major commercial platforms.
One of the most positive aspects of /e/OS is the large amount of detailed documentation It offers a wide range of features. The installation process, data migration, and update management are all explained in detail, so users can feel supported and less reliant on third-party assistance.
Graphene OS
Another notable alternative is Graphene OS, created and maintained by a non-profit organization, whose objective is to offer a mobile system private and securealways staying away from Google services and any microG-type implementation.
GrapheneOS focuses on strengthening device security at the level of kernel, memory management, permissions, and app isolationIt implements improvements in address randomization, hardens application sandboxing, and reduces the attack surface by removing non-essential system components.
Its privacy policy is particularly strict: the system does not include Google Play Services or other implementations that replicate its behavior. Instead, it allows the optional installation of a special version of Google Play Services encapsulated as a standalone application, so that the user can run apps that depend on them, but with much greater control over what they access.
Installing GrapheneOS requires carefully following the steps, typically using a dedicated web installer and a compatible browser. It primarily focuses on Google Pixel devices, which offer a secure and well-documented hardware base for implementing all the additional layers of protection the project provides.
microG and other privacy-focused projects
microG It is a suite of free components that allows Android apps that depend on Google services to run on systems where those services have been removed. Its function is to offer a open reimplementation of many Google Play Services APIs (such as push notifications, maps or location), but with more control over what data is sent and to whom.
By integrating into ROMs like /e/OS or other LineageOS variants, microG facilitates an interesting balance between privacy and functionalityIt is possible to continue using apps that require Google Play Services, but considerably reducing the level of tracking and telemetry associated with the official Google ecosystem.
Alongside microG, there are other privacy-focused projects, such as Calyx OS or advanced firewall systems and additional permission managers, which complement standard Android or third-party ROMs with granular controls over what information each application shares.
Alternative app stores
One of the biggest barriers to using alternative systems (whether ROMs or Linux-based systems) is the application availabilityWithout access to Google Play, the solution involves using alternative stores or manually installing APK files.
The safest and most well-known stores are:
- F-Droid: Repository exclusively for applications open sourceIdeal for those who prioritize software freedom, transparency, and the absence of trackers. All apps are reviewed and compiled from source code by the project itself, adding an extra level of trust.
- UptodownThis APK download platform offers thousands of Android apps. It provides app information, previous versions, and a malware analysis policy, although it's always recommended to check each app's reputation before installing it.
- Aurora StoreAn unofficial Google Play client that allows you to download apps from the official store without needing a Google account associated with your device. It acts as an intermediary, accessing the Play Store catalog and making APKs available to the user, which is very useful for ROMs without Google services.
Beyond these options, some projects like /e/OS offer their own app store integrating results from different sources, with privacy analysis and notices about the permissions requested by each app.
The main caveat here is be very careful about the origin of the applicationsDownloading APKs from outside official channels increases the risk of malware, Trojans, or software with hidden malicious behavior. Checking digital signatures, reviewing community feedback, and limiting app permissions are essential practices to minimize these risks.
Advantages and challenges of alternative systems
Choosing a mobile operating system outside the Android-iOS pairing It has several advantages but also important challenges.It's not just about installing something different, but about adopting a different and often more demanding usage model.
Among its advantages, the following stand out:
- Enhanced PrivacyMany alternative systems and ROMs minimize tracking, offer advanced permission controls, and prevent the mass transmission of data to large corporations.
- Greater user control Regarding the software and hardware, with the option to choose which components run, which apps come pre-installed, and how updates are managed.
- Recycling and sustainabilityProjects like PostmarketOS or LineageOS allow you to recycle old devices and continue using them with modern software, reducing electronic waste.
- Technological diversityThe existence of alternatives fosters innovation, prevents the market from depending solely on two companies, and opens up space for new ideas in interfaces, security, or distribution models.
On the side of challenges, we find:
- Limitation on the number of compatible devicesNot all models allow unlocking the bootloader or have enough community support to receive a stable ROM.
- Lack of standards surrounding ARM and hardware diversity, which complicates maintaining the same system version for many different phones.
- Absence of key applicationsServices such as WhatsApp, banking apps, popular games, or video platforms often lack an official client for pure Linux systems or have problems on ROMs without Google services.
- Less attention from developers and manufacturers, which focuses its resources on Android and iOS, leaving the alternatives with small teams and limited resources.
In addition, many times to install a new system it is necessary unlock bootloader Unlocking the device is a process that carries security risks, especially if reliable tutorials are not followed. Unlocking the device can erase all data, cause the loss of certain security certifications (such as those guaranteeing integrity for mobile payments), and even stop the device from receiving official over-the-air (OTA) updates.
Leaving the bootloader unlocked can facilitate certain physical attacks on the device, known as type attacks "evil maid"In these situations, someone with physical access to the terminal for a period of time can manipulate the system, install malware, or extract sensitive data. Therefore, it is essential to carefully assess whether taking this risk is worthwhile and to implement additional measures (full encryption, strong passwords, monitoring of physical access).
What future do these alternative systems have?
The existence of these systems keeps alive the spirit of innovation and competition Outside the mainstream. Some manufacturers, like Huawei with HarmonyOS or Purism with PureOS, are investing heavily in their own platforms. Others, like the developers behind LineageOS, Ubuntu Touch, Sailfish OS, GrapheneOS, or /e/OS, continue to improve their projects hoping to carve out niche markets or cater to those seeking a different experience.
Looking ahead, the momentum of free software, the growing concern about digital privacy And the arrival of new devices adapted to Linux could give these systems more prominence, although it's unlikely they'll unseat the major players in the short term. Where Android and iOS dominate in terms of ecosystem and compatibility, the alternatives point to... advanced users, activists, developers, and highly aware profiles.
We are also likely to see greater integration of technologies such as local artificial intelligence (models run on the device itself), more advanced encryption tools and secure resource sharing systems between devices, areas where both major platforms and alternatives are experimenting.
Beyond Android and iOS lies a whole universe to discover, where innovation and privacy remain paramount. If you want to explore what technology offers beyond the beaten path, these alternative systems can open the doors to a truly different and customizable experience, though not always easy or comfortable for the average user. The road is full of challenges, but also... possibilities for those looking for something more that they are the same as always and are willing to dedicate some time to learning, testing and experimenting.