Three Garmin Connect IQ apps that show the GB Ordnance Survey Grid Reference of the current GPS position.
I have put the calculation class in a separate source file that's shared between the 3 apps. It could be used to make a monkey barrel but I found that tricky for debugging and testing, so I just use the source directly. The monkey.jungle files specify where it's found.
The apps are available from the Garmin Connect IQ Store. Widget: https://apps.garmin.com/en-US/apps/10473162-3729-40e9-9a72-b7c16528c758 Simple Data Field: https://apps.garmin.com/en-US/apps/d56ff2c7-98d6-4390-8e99-4c844f1f32d1 Data Field: https://apps.garmin.com/en-US/apps/3b19825b-2021-44e2-81f7-62c87877a456