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Send SMSs like telegraphing on your light sensor! Even with the screen off.

customize your own message and tap code!

send sms with your geo location info even with the screen off!

instructions: with the App open(you can close the screen with the app on background) , just tap your light sensor to send your pre-stored messages(like a speed dial) .Long tap means 1, short tap means 0.

2012 Penn apps. Developed by the team from George Washington University.

What's New in the Latest Version 1.0

Last updated on Aug 8, 2016 light sensitivity had been improved.
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