Dynamic apnea · Free
Stop counting laps.
You’ve got harder things
to think about.
inDepth Apnea Pool turns your Garmin into a dynamic apnea training buddy. It knows when each dive starts and ends, catches every turn, times every length, and shows full heart-rate charts while you hang on the wall. It also runs the multi-set workouts you build on your phone, and you can tweak them on the watch. Works for DYN, DYNB, DNF and STA.
Built for pool apnea
A training partner that counts your laps and reads your heart.
In the pool, the details matter: splits, rests, heart rate and a history you can trust. inDepth Pool tracks all of it for you and keeps it on both the watch and your phone.
Automatic everything
The watch knows when a dive starts and ends, catches every turn and counts laps by itself. You get a split for every length without pressing a single button mid-swim.
02Heart-rate charts on the wrist
Open any rep during the session to see its splits and the full heart-rate trace, from the rest before it through the swim itself.
03Workouts that travel
Build workouts with multiple reps and sets on your phone, sync them to the watch, and tweak them at the pool when plans change.
Workouts Plan on the phone, swim it on the watch
Dynamic apnea workouts, built on your phone and tweaked at the pool.
On-watch review
Check every rep before you swim the next one.
Between swims, open any rep to see its distance, swim time, rest and the full heart-rate chart, from your resting heart rate on the surface to your heart rate during the length. You can see how well you’ve recovered before you push off again.
On your phone Deeper graphs & data
The deep dive happens on your phone.
inDepth Apnea pulls your pool sessions off the watch over Bluetooth and turns them into proper graphs: splits, rests, heart rate, trends and personal bests, right next to your depth sessions.
Built by a freediver, for freedivers
inDepth started on a dive line.
I built inDepth Blue because my Fenix and Descent kept letting me down. I wanted help keeping track of surface rests. I wanted better alarms, hang detection and a proper history on the watch. Pretty much every feature in the app started as something my own watch couldn't do.
That hasn't changed. I test every release on my own dives, and the device table gets updated whenever divers tell me how their watch behaves in the water.
Mariusz, founder & freediver
- Free, no accountThe phone app and all three watch apps are free. Your logbook stays yours.
- Measured, not assumedOur depth figures come from real logged dives and pressure-chamber runs. Here’s the evidence for each one.
- Shaped by diversWhen a diver tells us how their watch behaves in the water, the device table changes.
Supported hardware
Works on the Fēnix, Forerunner, epix or Descent you already own.
You don't need new gear. inDepth Pool and inDepth Dry each run on 35 Garmin watches, including the Forerunner 255, 265, 570 and 955, the epix (Gen 2) and the Fēnix 9. inDepth Blue, the freediving app, runs on the Fēnix 5, 5 Plus, 7 and 8 families plus the Descent Mk2, Mk3 and G2, with more coming. How deep Blue can read depends on the watch. The Fēnix 5, 5 Plus and 8 families read true depth (uncapped, and checked in the water to 30 m). On the Fēnix 7 and the Descent Mk2 and Mk3, Garmin's firmware limits what third-party apps can read. Nobody has tested a Descent G2 yet, so we don't quote a figure for it and the app plays it safe. Each row below tells you which group a watch is in.
| Watch | inDepth Blue | inDepth Pool | inDepth Dry |
|---|---|---|---|
| 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 | ✓ | ✓ |
| Descent G2 | ✓Depth unverified | ✓ | ✓ |
| Forerunner 255 | — | ✓ | ✓ |
| Forerunner 255 Music | — | ✓ | ✓ |
| Forerunner 255S | — | ✓ | ✓ |
| Forerunner 255S Music | — | ✓ | ✓ |
| Forerunner 955 / Solar | — | ✓ | ✓ |
| Forerunner 265 | — | ✓ | ✓ |
| Forerunner 570 42mm | — | ✓ | ✓ |
| Forerunner 570 47mm | — | ✓ | ✓ |
| epix (Gen 2) | — | ✓ | ✓ |
| epix Pro (Gen 2) 42mm | — | ✓ | ✓ |
| epix Pro (Gen 2) 47mm | — | ✓ | ✓ |
| epix Pro (Gen 2) 51mm | — | ✓ | ✓ |
| Fēnix 9 43mm | — | ✓ | ✓ |
| Fēnix 9 47mm / 51mm | — | ✓ | ✓ |
| Fēnix 9 Pro 43mm | — | ✓ | ✓ |
| Fēnix 9 Pro 47mm | — | ✓ | ✓ |
| Fēnix 9 Pro 51mm | — | ✓ | ✓ |
| Fēnix 9 Pro Solar 47mm | — | ✓ | ✓ |
| Fēnix 9 Pro Solar 51mm | — | ✓ | ✓ |
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, Descent Mk2 and Mk3.Depth unverified = the Descent G2, which nobody has tested yet.
~40 m is the practical limit on a Fēnix, since the case is rated 10 ATM. On the seven ~3 m rows (the Fēnix 7 family, the Descent Mk2 and the Descent Mk3) inDepth Blue only offers the surface-rest models that don't need depth: 2× / 3× Dive Time and Manual, with 2× as the default. Adaptive (AIDA), Taravana and Molchanovs need a depth reading they can trust. Fed a ~3 m reading, all three came out at plain 2× anyway, so now the label says what the math was already doing. Your rests don't get any shorter. The evidence isn't the same for all seven rows: the Descent Mk3 is measured, the Fēnix 7 is inferred, and the Descent Mk2 is based on a diver's report that it stops at ~3 m, not on our own instruments. The Descent G2 is the eighth row without a true-depth badge, and it has no figure at all because nobody has tested one. It's a Descent, so we expect the same cap and the app treats it that way, which means the same three rest models are hidden there too. Molchanovs' 60 m / 24-hour rule isn't enforced on any watch, so keeping to that one is up to you. 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.
Chasing meters down instead of across? inDepth Blue is the depth side of things: a Garmin freediving computer with estimated minimum surface rests.
Already have sessions in Garmin Connect? Import your pool and deep dive logs into the inDepth phone app.
Free
Swim it before everyone else.
inDepth Pool is free. The download page has the desktop installer for the watch app, plus the phone app.