Android apps and permissions: what to allow and how to control access

Android is an operating system that is usually safe when used on devices, be they phones, tablets, Smart TVs and other gadgets. As in other systems, it will ask us for certain permissions when using the applications you have installed on the terminal.

You probably don't think much of granting permissions to each of the apps installed on your smartphone, although it's true that you should review each one of them periodically. A permission opens a specific door in the system.The tool will have access to your storage, camera, microphone, location, or other sensitive parameters of your mobile phone, such as call logs or SMS messages.

Which apps should we only allow access to when they are being used? It's a question many people ask, although sometimes it depends on how you intend to use the app. Instant messaging applications often request numerous permissions, leaving a significant vulnerability if you accept everything without reviewing them.

Be careful with certain permissions

Location is one of the most dangerous permitsThis allows them to track the places you've been at specific times and generate a very precise movement history. It's advisable not to grant this permission unless absolutely necessary, because even if you don't notice it in your daily life, advertising and analytics companies use this information to learn your habits and show you highly targeted ads.

An application, when it has some type of sensitive access, You can use that permission both in the foreground and background.Provided the system allows it and you don't restrict it. The various permissions are fundamental to an app's functionality and user experience; therefore, it's important to assign them judiciously and revoke them if you're not going to use them. That's why it's essential to understand what each permission entails and periodically review which apps have it granted, revoking it if you no longer need it.

Certain apps available on the Play Store will request access to almost all device permissions.However, it is always the user who ultimately decides whether or not to grant each permission. Contact permission is another sensitive example: it grants access to the name, phone number, and sometimes email address of everyone in your address book, which may not be positive for their privacy if used for commercial or advertising purposes.

In addition, Android incorporates different levels of permissions. Some are granted at the time of installation, and others are requested during runtime.When the app truly needs access to sensitive data, understanding this difference will help you identify which requests are more critical and when it's wise to pause and read before tapping "Allow."

What permissions should you be careful with?

The first and surely the most important is the location.For an app to use this permission, you need to have GPS or location services enabled on your phone. If you don't, the system will take you to that setting to enable it. The decision to enable or disable this permission will determine whether an application (for example, a GPS navigator) works correctly.

It's one of those permits that, if you don't take care of it, can backfire on you, because It allows you to know where you have been, when, and how oftenBrands like Huawei, for example, offer options such as "Allow only while using the app," so that once you stop using it or close it, location access is no longer active. This setting is highly recommended whenever possible.

If you have given access to the photos and videosThis is another permission you should be very careful with. It allows the app to read and, in some cases, modify or delete your gallery. If you have important images, it's best to grant access only when the app needs it, not permanently. It's one of those permissions that are often granted without reading the message, but you can always review them one by one later.

Android also allows you to manage permissions such as camera, microphone, files, SMS o call logsThese permissions are part of the group considered "dangerous" or runtime permissions. When used legitimately, they are very useful (for example, for video calls or audio recording), but in the wrong hands, they can be used to spy on conversations, read verification messages, collect your photos, or record your calls.

In addition to standard permits, there are other particularly sensitive ones, such as the one for accessibilityThat of device administratorThat of show above other apps or the access to all filesThey are not as visible as the previous ones, but they can give an application very deep control over the phone, so you should only activate them in apps that you fully trust.

Full Internet Access

The user does not usually see a specific dialog box to grant internet access permission.This type of access is declared in the app's manifest. However, it's important to understand that if an application has this permission and can also access your contacts, files, location, or microphone, it could potentially send that data to external servers.

Many advertising companies use the Internet connection to display personalized ads, download profiles, or send usage statistics Regarding your activity, the best advice is to review which apps really need network access (for example, a browser or a social network) and consider uninstalling those that, without apparent need, are constantly connecting.

It's not an access you'll see explicitly in a permissions dialog, but you can suspect it when an app constantly displays ads or consumes a lot of data in the background. Before installing an app, it's a good idea to check its ratings, number of downloads, and developer, since Fraudulent apps often abuse the internet connection to send data or download other malicious components.

A review of all applications to see if they are granted the appropriate permissions. It's just a matter of dedicating at least 10 minutes to checking your phone, time very well spent. To access them, you have to do the following on your device (it may vary slightly depending on the manufacturer's interface, but the logic is the same):

• Access "Settings" on your phone.
• Tap on "Applications" and then on "See all applications" or a similar option.
• Open the app you want to check and tap on "Permissions"To change the permission, select "Do not allow" if it is set to "Allow" or choose "Allow only while using the application" when available.

In addition to reviewing app by app, Android includes a permission manager There you can see, grouped by permission type, all the apps that have access to the camera, microphone, location, SMS, etc. From there you can quickly revoke permissions that don't make sense.

Location permit

Locating the person at all times is something that a lot of applications do todayAlthough not all devices actually need it. Granting this specific permission creates a movement log that isn't beneficial in the long run if used for commercial purposes or excessive tracking. Furthermore, keeping location services continuously active consumes extra battery power.

Apps like Facebook and WhatsApp may ask for your location at any time. WhatsApp doesn't share your location unless you explicitly send it, but it does require your permission when you share your location with a contact or group. Facebook has been improving privacy.But that doesn't mean you have to constantly share your location or allow background location services if they are not essential.

This permission doesn't make much sense if you only use basic messaging functions.Try disabling it if you want to maximize battery life and reduce tracking. In other apps, such as map apps, ride-hailing services, or local recommendation tools (like Foursquare), it's a vital permission, as it's required to locate you and show you routes, nearby businesses, or traffic information.

Furthermore, Android differentiates between foreground and background locationThe first is used when the app is in use (for example, while viewing the map), and the second when the app wants to locate you even when it's minimized. Whenever possible, limit location access to "Only while using the app" and avoid granting permanent access unless absolutely necessary.

If you want to check which apps have recently used your location, the Android privacy panel shows a history of access to the most sensitive permissions in the last few hours or days. There you can detect strange behavior, such as a flashlight app accessing your location.

Permission to access contacts

Several apps require access to your phone's contacts to function; One of them is WhatsApp, which uses this permission to share contacts. to its internal list and show you who is available to talk. It only works with a phone number, whereas, for example, Telegram can also work with usernames without needing to sync your entire contact list.

The privacy of your contacts is importantIf you don't grant this access, some features may not work (such as showing who in your contacts uses the app), so it makes sense to only enable it for trusted messaging apps. Even so, it's best to avoid granting this permission to games, flashlight apps, image editors, and, in general, any tool that doesn't have a clear reason to access your contacts.

Remember that when you allow access to your contacts, You're not just giving away your own data, but also other people's data. They may never have authorized that company to process their information. That's why it's crucial to periodically review which applications have this access in the permissions manager and revoke it in any where it's unnecessary.

Some Android skins indicate whether a permission is "recommended" or "required" for the app to function correctly. In the case of the contact list, it's usually an essential permission for calling, SMS, or messaging apps, but not for many other categories.

How to change and manage app permissions

You can allow certain apps to use various features of your device, such as the camera or contact list. The app will display a notification or system dialog requesting permission to use these device features, and you can choose whether to grant it. Allow o DenyIn the device settings, you can also change the permissions of a specific application or do so according to the type of permission you want to modify.

To change the permissions of an installed app, the general procedure is:

1. On your device, open the app Settings.
2. Toca Applications.
3. Tap the app you want to modify. If it doesn't appear, tap See all applications and choose your app.
4. Toca Permissions. You'll see which permissions have been granted and which have been denied..
5. To change a permission setting, tap it and select Allow, Allow only when using the app, always ask o Do not allow, depending on the available options.

If you are going to modify location, camera, or microphone permissions, you will usually find these variations:

• All the time (location only): The app can use the permission at any time, even when you are not using it.
• Allow only if app is in useThe app can only use the permission when it is open or in the foreground.
• always ask: every time you open the application and it wants to use that permission, it will ask for temporary authorization.
• Do not allowThe app cannot use this permission under any circumstances.

In addition to modifying permissions app by app, you can check which apps have been granted the same category of permissions. For example, See all those who can check your calendar, access your microphone, or read your SMS messages.. For it:

1. On your device, open the app Settings.
2. Toca Security and privacy > Privacy > Permissions manager (Names may vary slightly).
3. Choose a permission type, such as Camera, Microphone, Location, Contacts, etc.
4. You'll see a list of apps that have that permission allowed, limited, or blocked, and you can change it for each one.

In recent versions of Android you also have a privacy panelThis panel shows which apps have recently accessed your camera, microphone, location, and other data, and for how long. From there, you can directly access each app's details to adjust its permissions.

Most common types of permits and what they entail

The applications need certain permissions to function as intended, but Sometimes they ask for more than they really needUnderstanding what each category entails helps you make better decisions about what to grant and what to block.

• CalendarIt allows you to access your calendars, read events, and in some cases, create or modify appointments. It's useful for productivity apps or email, but can also be used to track your habits and appointments.
• Call logsThis grants access to the phone's call history. It is highly sensitive and only makes sense in phone apps, caller ID, or specific legal call recorders.
• CameraIt allows you to take photos and record videos. Necessary for camera apps, social media, or video calls, but dangerous if a dubious app can activate the camera without you noticing.
• ContactsIt allows you to read your address book. Essential for messaging and calls, but a gateway to third-party data.
• Files / StorageThis allows access to files stored on the device. Android is increasingly restricting this permission, but it remains critical for file managers, backup apps, media playback, and document editing.
• Health and fitness / Body sensors: provides access to health data, steps, heart rate and other parameters collected by the device or wearables.
• Location: accesses the device's location with varying degrees of accuracy. It is one of the most sensitive categories.
• MicrophoneIt allows you to record audio. Essential for calls, voice notes, or voice assistants, but also a potential channel for unauthorized listening.
• Music & Audio: access to audio files stored on the device.
• Nearby devices: allows you to search for and connect to nearby devices via Bluetooth, Wi-Fi Direct or other technologies.
• Notifications: authorizes the app to show you notifications in the status bar.
• Phone Number: allows you to make and manage calls, check the IMEI and other network data.
• Photos and videos: grants direct access to your media gallery.
• Physical activity: access to movement data such as steps, routes or activity patterns.
• SMSIt allows you to read and send SMS messages. This is very important because many services use SMS for bank verifications or 2FA codes.

Beyond these, Android has special permits, such as accessibility, overlay on other apps (show on top), access to all files, device administrator or installation of unknown apps, which can be especially dangerous if granted to malicious software.

App permissions you should avoid or scrutinize closely

Some permissions are so powerful that These vulnerabilities can be exploited by malware to steal your data or take control of your device.It is important to know them in order to know when a risk is unacceptable.

• AccessibilityDesigned to help people with disabilities, this app allows you to read what's on the screen and perform actions on their behalf. In malicious hands, it can be used to steal passwords, intercept SMS messages, or control your phone.
• device administratorThis feature grants the ability to block, reset, or prevent the uninstallation of an app. Useful for security or business management apps, but very dangerous if you activate it on an unknown app.
• Show on top (overlay)This feature allows an app to display floating windows over other applications. It can be used to create fake login forms and steal credentials.
• Access to todos los archivos: grants read, modify and delete all public files on the device; should only be used by file managers, backup apps or similar.
• media management: allows an app to manage and, sometimes, delete photos and videos from other applications.
• Install unknown appsThis allows an app to initiate the installation of other applications from outside the Play Store. Use only with highly trusted app stores or sources.

The Play Store applies strict controls to try to prevent malicious apps from abusing these permissions, but there's always a risk that one might slip through or that you might install an APK from a third-party source. If an app requests one of these advanced permissions and If you're not sure why it's needed, the safest thing to do is deny it or uninstall it..

Android has also incorporated additional measures such as single-use permits for camera, microphone and location, and the automatic reset of permissions in apps you haven't used for several months, which helps clean up old shortcuts that no longer make sense.

Learning to carefully read each permission dialog, checking the permission manager from time to time, and being wary of apps that ask for more than they need will give you much finer control over your privacy and significantly reduce the risk of malware or data theft every time you install something new on your Android.