Body Sensors
Allow access to your health data from heart-rate monitors, fitness trackers, and other external sensors. Fitness apps need this permission to monitor your heart rate while you exercise, provide health tips, etc. A malicious app could spy on your health.
Calendar
Allows apps to read, create, edit, or delete your calendar events. Calendar apps obviously need this permission to create calendar events, but so do social networking apps that allow you to add events and invitations to your calendar. A malicious app can spy on your personal routines, meeting times, etc. — and even delete them from your calendar.
Camera
Allows apps to use your camera to take photos and record videos. Camera apps need this permission so you can take pictures. A malicious app can secretly turn on your camera and record what is going on around you.
Contacts
Allows apps to read, create, or edit your contact list, and access the list of all accounts (e.g., Facebook, Instagram, Twitter, etc.) used on your device. A communication app can use this to let you text or call other people on your contact list. Likewise, a malicious app can steal the entire contents of your address book and then target your friends and family with spam, phishing scams, etc.
Location
Allows apps to access your approximate location. Navigation apps can help you get around and a malicious app can secretly track your location to build a profile on your daily habits, or even let thieves know when you’re not at home.
Microphone
Allows apps to use your microphone to record audio. A communication app can use this to allow you to send voice messages to your friends. A malicious app can secretly record what’s going on around you, including private talks with your family, conversations with your doctor, and confidential business meetings.
Phone
Allows apps to know your phone number, current cellular network information, and ongoing call status. Apps can also make and end calls, see who’s calling you, read and edit your calling logs, add voicemail, use VoIP, and even redirect calls to other numbers. A malicious app can spy on your phone habits and make calls without your consent (including paid calls).
SMS
Allows apps to read, receive, and send SMS messages. Communication apps can use this to let you message your friends. A malicious app can spy on your messages, use your phone to spam others, and even subscribe you to unwanted paid services.
Storage
Allows apps to read and write to your internal or external storage. An app can save downloaded songs to your SD card, or a social networking app can save your friends’ photos to your phone. A malicious app can secretly read, change, and delete any of your saved documents, music, photos, and other files.