What happens if I deny App permissions?

When you give access to an app to photos (either through the prompt that comes when the app tries to access photos or through Settings > Privacy > Photos), the app gets access to write new photos/images to your Camera Roll and to read all your photos on the device in an unencrypted form .

Clever manipulation of Android’s internal rules for using the camera has revealed that it is possible for apps to use your camera without ever making you aware that it’s happening , effectively creating situations where a malicious app could take pictures or video and send them to a remote source.

There is a total of nine dangerous permissions : BODY SENSORS, CALENDAR, CAMERA, CONTACTS, LOCATION, MICROPHONE, PHONE, SMS, STORAGE. For some apps it is normal and expected to request some of these permissions.

An app will ask for permission when it needs something it can’t access without it, and if you choose to refuse, that part of the app will not work . This can have little effect on the rest of the app, or it can be show-stopping and the app won’t work.

Camera Permission – Your application must request permission to use a device camera . Note: If you are using the camera by invoking an existing camera app, your application does not need to request this permission. For a list of camera features, see the manifest Features Reference.

Once an app has access to your contact list, it can upload phone numbers, email accounts and other information to an advertising or phishing scam list. If you don’t think an app needs access to your contacts, leave this permission turned off and help protect your family and friends .