https://apps.garmin.com/en-US/apps/b5aead02-e9ba-40ee-a88c-1f67b8e43304
It vibrates every minute and emits a beep on signals (ISAF 5-4-1-0 sequence).
At the start emits an alarm, vibrates and then times up for the race duration.
The timer can be synchronised to the nearest minute, up or down.
It has two modes:
- Standard mode: starts at 5 minutes.
- Pursuit mode: allows offset to be configured. Main timer shows 5 minute sequence, offset timer shows your start.
I have the Fenix 3, so have only tested it on that. The other devices are tested in the simulator and should work in theory, but I'd be grateful for feedback from other watch owners.