Source code available on Github: https://github.com/safetytracker/open-sms-locator
“SafetyTracker” is released under the GNU General Public License (GPL, or “free software”).
This license grants people a number of freedoms:
- You are free to use SafetyTracker, for any purpose
- You are free to distribute SafetyTracker
- You can study how SafetyTracker works and change it
- You can distribute changed versions of SafetyTracker
The GPL strictly aims at protecting these freedoms, requiring everyone to share their modifications when they also share the software in public. That aspect is commonly referred to as Copyleft.