Depth & pool apnea · Free
Your watch already reads depth and heart rate. What it can't do is tell you when it's safe to dive again — or count laps while you're mid-swim. inDepth Blue makes it a real freediving computer, with the surface-rest safety models freedivers actually train under. inDepth Pool runs your dynamic sessions — every dive, turn and length caught automatically. Together they're inDepth Apnea — both free.
Two apps, one logbook
Depth · Freediving & spearfishing
The freediving computer your Garmin was supposed to be — it tells you when you're safe to dive again, reads live depth, can pop the last dive up the moment you surface, opens mid-dive profiles, spots your hangs, marks the reefs and wrecks you want to find again, and keeps your dive log on the wrist.
See inDepth Blue →
Lengths · Dynamic apnea
Your pool training partner — it catches every dive, turn and length on its own, splits every lap, charts your heart rate between reps, and runs the workouts you build on your phone.
See inDepth Pool →One system, three parts
Two free apps that live on your Garmin and run every session on their own — no phone anywhere near the water. inDepth Blue: live depth, five surface-rest safety models, alarms, hang detection. inDepth Pool: automatic turns and laps, splits, heart-rate charts.
One phone app for both — it pulls your depth and pool sessions off the watch over Bluetooth into a single logbook, with the graphs, trends and personal bests a watch screen can't draw.
A desktop app that puts both apps on your Garmin over USB in seconds. No developer account, no side-loading gymnastics.
Built by a freediver, for freedivers
I built inDepth Blue because I got tired of many missing features and unnecessary limitations of my Fenix and Descent. I wanted a clear idea when it was safe to dive again. I wanted better alarms, hang detection, better on watch history. Every feature is in here because the watch on my wrist didn't have it.
It's still built that way: I test releases on my own dives, and the device table changes when divers report what their watches really do.
— Mariusz, founder & freediver
Supported hardware
No new gear to buy. inDepth runs on eighteen Garmin models today — the Fēnix 5, 5 Plus, 7 and 8 families plus the Descent Mk2 and Mk3 — and more are coming. How deep it reads depends on the watch: the Fēnix 5, 5 Plus and 8 families read true depth (field-verified to 30 m and uncapped), while Garmin's firmware limits what third-party apps can read on the Fēnix 7 and on both Descent generations. Each row below carries its own figure.
| Watch | inDepth Blue | inDepth Pool |
|---|---|---|
| Fēnix 5 | ✓True depth | — |
| Fēnix 5S | ✓True depth | — |
| Fēnix 5X | ✓True depth | — |
| Fēnix 5 Plus | ✓True depth | ✓ |
| Fēnix 5S Plus | ✓True depth | ✓ |
| Fēnix 5X Plus | ✓True depth | ✓ |
| Fēnix 7 | ✓Depth to ~3m | ✓ |
| Fēnix 7S | ✓Depth to ~3m | ✓ |
| Fēnix 7X | ✓Depth to ~3m | ✓ |
| Fēnix 8 43mm | ✓True depth | ✓ |
| Fēnix 8 47mm | ✓True depth | ✓ |
| Fēnix 8 Pro 47mm | ✓True depth | ✓ |
| Fēnix 8 Solar 47mm | ✓True depth | ✓ |
| Fēnix 8 Solar 51mm | ✓True depth | ✓ |
| Descent Mk2 / Mk2i | ✓Depth to ~3m | ✓ |
| Descent Mk2 S | ✓Depth to ~3m | ✓ |
| Descent Mk3 43mm | ✓Depth to ~3m | ✓ |
| Descent Mk3i 51mm | ✓Depth to ~3m | ✓ |
True depth = uncapped depth reading on Fēnix 5, 5 Plus and 8 (field-verified to 30 m).Depth to ~3m = firmware-limited on Fēnix 7 and Descent.
~40 m is the practical limit on Fēnix, whose cases are rated 10 ATM. On the seven ~3 m rows — the Fēnix 7 family and both Descent generations — inDepth Blue offers only the surface-rest models that don't need depth (2× / 3× Dive Time and Manual, default 2×): Adaptive (AIDA), Taravana and Molchanovs need a depth they can trust, and fed a ~3 m reading all three already came out at plain 2×, so the label now matches the arithmetic — rests don't get shorter. Those seven rows don't all rest on the same evidence: the Descent Mk3 is measured, the Fēnix 7 is inferred, and the Descent Mk2 is reported clamped at ~3 m by a diver, not instrumented. Molchanovs' 60 m / 24-hour rule isn't enforced on any watch; that one stays yours to keep. How we know each number. More Garmin watches are planned — tell us which one you use and we'll let you know if it's added.
Free
The desktop installer puts the watch app on your Garmin and the phone app on your iPhone or Android — all free.
