What are the benifits of this application? 1. You can always hold this and easy to use. 2. You can magnify small letters to read small labels. 3. You can see the remote signs more largely. What are the most useful functions? 1. You can see and read at night using flash. 2. You can manually focus any time. 3. You can capture images and save them to your album. [Permissions] - (essential)Camera : Camera is essential for magnifier and telescope - (optional)Storage : Save capture images