Spy Video Recorder

This app records video in background while your device is blocked or another app is running.
Record with back or front camera.
You can make and receive phone calls while recording(some devices record the conversation).
You can use others applications while recording(except radio and media players).
Set the maximum recording time, 1 or 3 minutes(unlimited in PRO version).
The device does not plays any sound when the recording starts or stops (Some devices do not support this depending on your country laws, also remember to disable sounds when you click something in your device, settings>sound>audible selection , checkbox disable).
The app creates an icon called "docs" in your desktop , pressing that icon starts or stops the recording, only you know that the device is recording.
A notification appears at the top left corner of the screen while recording.
You can delete the shortcut, and if you need it afterwards, you can create another one from the app .
Select the folder where you want to save the videos (PRO version).
Open the destination folder of the video recordings if you have a file manager installed at your device.

This app allows you to make video recordings and the people around you will not notice. Once the recording is started you can use the others app in your phone, even receive and make phone calls, or lock the screen. The device does not plays any sound, you only notice the start or stop recording when you have it in your hand with a little vibration.

This is the free version, you can make recordings with a maximum duration of 1 or 3 minutes. Get PRO version if you want unlimited time recording and save the videos in the folder that you choose.