Mobile application sources and permissions

 No matter which mobile operating system you have adopted, downloading apps from verified, trusted sources such as Google Play and Apple's App store is always the best option to maintain your security and privacy.

However, the permissions you give an installed app are also important.

Apps can request a variety of permissions including sensor data, call logs, camera and microphone access, location, storage, and contact lists. While many legitimate apps do require access to certain features, you should always make sure you are aware of what apps can access what data to prevent unnecessary security risks or information leaks.

Research published in January 2020 suggests that 14% of all Android apps contain contradictions in-app data collection policies.

To be on the safe side, any time you no longer need an application, you should simply uninstall it.