What are the benefits of this application? 1. You can always hold this and easy to use. 2. You can check your makeup without keeping the mirror in your bag. 3. It's very useful to check your appearance of your dress. 4. You can use this as rear mirror for surveillance. 5. You can see your face with small screen (small and tiny mirror) What are the most useful functions? 1. See the back of your head 2. Capture images and save them 3. Minimize for a small and tiny mirror [Permissions] - (essential)Camera : Camera is essential for mirror - (optional)Storage : Save capture images