Earthquake notification, proximity - magnitude alerts, track and analysis tool.
Chat anonymously with nearby people with encrypted proximity chat via ultrasounds.
Turn the display on or off using the proximity sensor
Turn on the display by waving
Get notifications of person with coronavirus within 100m you.
Notify service within 100m of visitor's visiting area
Unlock Screen Lock is the best app to lock and unlock the screen without use the keys of your phone.
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