Motion Detector Plus is a free Android application developed by Awesome Apps that enables motion detection functionality on your device's camera. Once enabled, the camera will capture photos only when motion is detected. All taken photos will be saved in your gallery or on your SD card. The app also offers several options such as activation time, sample rate, number of pictures to shoot, picture resolution, sending SMS message when motion is detected, and sensitivity level for motion sensor.

To use the app, simply adjust all settings in the settings menu and place the device on the desired location without moving it. Press the start/stop button to initiate the motion detection process and wait for the percentage bar to show how much the image has changed. When it reaches the sensitivity level set in the settings menu, the camera will start shooting images, and an alert will pop up with the message "motion has been detected." All captured images will be saved into your gallery, and you can open them using any image viewer app.

Motion Detector Plus is a great way to provide safety, security, and protection for your home or workplace. However, the sensitivity of the detection varies by surrounding light conditions, so it's recommended to test and choose the best option for the given areas. Overall, this app is a useful tool for anyone looking for an automatic motion detection system on their Android device.