Requirements: Android 2.2+
Overview: Spy Camera OS(D) is DONATE version of open source Spy Camera OS project
Spy Camera OS is an open source spy camera project
Everyone at one time will want to capture image without anyone notice it, this application will give you an easy, fast and smart way doing it.
With transparent UI, no one will notice it.

Features:
– Small size application
– Full/max camera resolution
– Fast capture
– Back/front camera
– Auto shot with delay setting
– Face detection auto shot
– Black screen (touch to capture)
– Pinch to zoom
– Hide/show folder on Gallery
– Vibration
– Open source

Next Features:
– Widget
– Minimize & floating app
– Human detection?
– Submit your idea/code at bitbucket* / XDA / email me

What’s new on V0.4.1:
– New language: Polish (thanks to Maciej)
– Android 6.0 runtime permission request
– Prevent video corrupt because of empty battery shutdown
– Add headset button action configuration
– Bug fixes

Screenshots

The app was not found in the store. 🙁