Sure it would and there are existing Pebble time tracking apps. Here's a search ...

zevon 49 days ago | parent | context | favorite | on: Two new PebbleOS watches

Sure it would and there are existing Pebble time tracking apps. Here's a search for "Time Tracker" in the Rebble store but I'm sure you will find more with other search terms: https://store-beta.rebble.io/apps/search?query=time%20tracke...