ZodiacFinder
ZodiacFinder answers one question from home or the beach: where is the boat, and is it all right? It reads the latest position from the GPS tracker on my Zodiac and shows it on a map with its speed and the age of the fix, green when fresh and red when the tracker goes quiet.
It also watches the boat's battery: a voltage history with an estimate of how long until it drops to 12.5 V, and a live tab that talks straight to an ANCEL BM200 battery monitor over Bluetooth, with no account and no cloud.
- Anchor alarm
- Bluetooth
- GPS tracker
Personal project, early version (1.0), made for one boat. Not on the App Store.
iOS 26.5 or later · version 1.0
Inside ZodiacFinder
Live position on a map
Shows the Zodiac's last fix with its speed and how long ago it came in, refreshed every 30 seconds. The marker turns red when the tracker has been silent for more than five minutes.
Recent track at a tap
Draws where the boat has been over the last 30 minutes or 6 hours, with the distance travelled.
Anchor watch with alarm
Set the anchor at the boat's position, choose a swing circle from 20 to 300 metres and arm the watch. If the boat drifts outside the circle, the phone raises a time-sensitive alert, and it keeps checking in the background.
Battery forecast
Graphs the boat's supply voltage over the last hour up to 30 days and works out, from the trend, how long until it falls to 12.5 V.
Bluetooth battery monitor
Connects directly to an ANCEL BM200 on the battery and shows the charge level as a gauge, with voltage, temperature, charging status and a live voltage graph.
Six months of readings
Battery readings are logged on the device for six months and can be exported as a CSV file to share.
Good to know
- Made for one boat: positions and voltage history come from my own GPS tracking server, so the app shows nothing without that setup.
- The Bluetooth tab needs an ANCEL BM200 monitor in range. The monitor accepts only one connection at a time, so close its own app first.
- Anchor alarms arrive as notifications, and background checks run only when iOS allows, every few minutes at best. Treat it as a helper, not a guarantee.