Thanks to everyone that voted on this issue and gave us constructive feedback.
We've released GPS Clock-ins to the Tanda app on the latest version of the app for iOS and Android.
You can read about enabling it here (http://help.tanda.co/time-and-attendance/setup-tanda-s-mobile-app/tanda-app-gps-clock-in).
Whilst this feature is in its early days we'd love to hear all feedback and improvements.
Feel free to reach out if you have any questions about this feature. Thanks!