Duper
Remotely ring or locate your phone via SMS, no internet needed.
Description
Duper lets you remotely control your Android phone using simple SMS commands — no internet connection, no account, no server.
Send "duper ring" to make your phone ring at maximum volume with the flashlight blinking, even in silent mode. Useful when you've lost your phone nearby.
Send "duper locate" to receive your GPS coordinates by SMS at regular intervals. Useful in an emergency or when you lend your phone to someone.
Features:
• Ring with flash, bypasses silent mode
• GPS location tracking via SMS
• Both modes stop when the phone is unlocked
• Configurable prefix, password, duration, and interval
• Custom ringtone support
• Works entirely offline over SMS
• No account, no cloud, no tracking
The prefix and optional password are configurable so only people who know them can trigger commands.
Note: On Android 13+, you may need to allow restricted settings once in the app settings before granting permissions.
Open source under GPL-3.0.
Versions
Permissions
What the app asks the system for. Android only grants sensitive access after you confirm it.
- Receive SMSProcess incoming text messages.
- Read SMSRead text messages.
- Send SMSSend text messages (may cost money).
- CameraTake photos and videos.
- Prevent sleepingKeep the device from going to sleep.
- Audio settingsAdjust volume and audio output.
- ACCESS_NOTIFICATION_POLICY
- Foreground serviceKeep running in the background, visible in the status bar.
Show 7 more permissions
- FOREGROUND_SERVICE_SPECIAL_USE
- NotificationsShow notifications.
- Precise locationDetermine the location via GPS.
- Approximate locationDetermine the location via the network.
- Location in backgroundDetermine the location while the app is not open.
- WRITE_SECURE_SETTINGS
- duper.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION
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