At first glance, it’s an ordinary calculator — but hidden inside are secret apps you unlock with a special number combination. Store and hide videos, photos, and text of all your math problems without anyone noticing.

Play step-by-step solution videos, control brightness, change text backgrounds, use text-to-speech, FM radio, music player, voice recorder, or even transfer files as a removable disk. Plus, the Emergency Button instantly switches back to calculator mode if someone gets suspicious