A slider makes it possible to change the zoom factor up to x4.
The application uses the integrated camera of the device to show a zoomed image on screen.
In addition you can use the camera flash as a flashlight for better sight.

Have your magnifying glass always with you.
Use it to read small text. Use it to analyse tiny objects.
It's like a small microscope in your pocket.

Please note:
Continued use of the flash may dramatically decrease battery life.