Dive logs are a requirement for any serious diver — a record of where you've been, how deep, for how long, and with what gear. Most divers use a paper log. Some use commercial apps that require a subscription and sync to servers you can't control.
I wanted something simple, offline-first, and mine. The diving log is a PWA: install it on your phone, use it with no internet, and all data lives in IndexedDB on the device.
Features: site tracking with GPS coordinates (saved when available, entered manually when not), dive profiles, equipment lists, and a buddy log.