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—— Gear Review · Watches

Garmin Descent Mk3i

Smartwatch + dive computer · AMOLED display · GPS

The best option for divers who want one premium device: genuine freediving mode with depth alarms, plus a full smartwatch. Primarily justified by the non-dive features.

8.7 / 10
—— Verdict
Recommended, multipurpose premium
Garmin · Watches
—— Price (USD)
~$650+
Affiliate link · disclosed below
—— What we like
  • + Full smartwatch capabilities combined with a competent dive computer
  • + GPS, fitness tracking, sleep, notifications, a real everyday watch
  • + Genuine freediving mode with depth alarms and dive log
  • + Garmin app ecosystem for detailed session review
  • + Looks like a regular watch off the water
—— What to know
  • − Very expensive, primarily justified by non-dive features
  • − Overkill if you only want a dive computer
  • − Battery drains faster when smartwatch features are active
  • − Heavier and larger than dedicated freedive computers
— Section 01

Overview

The Garmin Descent is the right device if you want one premium watch for running, training, GPS navigation, daily notifications, and freediving, and you're willing to pay for that integration. It is not the right device if you're primarily buying it as a freediving computer and expecting to justify the price on dive features alone.

— Section 02

The Integration Value

Garmin's Connect ecosystem is mature and well-designed. Your freediving sessions sit alongside your runs, swims, and gym workouts in one app. Your dive log shows GPS tracks of surface swims, depth profiles, surface intervals, and personal bests. For divers who are also athletes using Garmin for other sports, the value of having everything in one place is genuine.

— Section 03

The Freediving Mode

Competent. Depth alarm, ascent alarm, surface interval, dive log. It's all there. The AMOLED display reads clearly at depth. The wrist-heart-rate sensor (available on the Mk3i) adds biometric context to dive sessions.

What it's not: the D4f's purpose-built simplicity. The Garmin's freediving mode is accessed through a menu. The D4f is always in freediving mode. Underwater, that difference can be annoying if you need to change settings mid-session.

— Section 04

Daily Wearability

This is the Descent's strongest argument. It looks like a regular sports watch, not a dive computer on your wrist. If your dive sessions are 2-3 days a week and you want to wear the same watch every day, the Descent removes the 'which watch today' decision.

—— Frequently asked

Questions about
Garmin Descent Mk3i.

01 How does the Garmin's freediving mode compare to the Suunto D4f? +
Both have depth alarms, surface interval tracking, and dive logs. The Garmin's freedive mode is competent but was designed as one of several sport modes, not as the primary function. The D4f's interface is more optimized specifically for freediving use underwater. The Garmin wins on data integration (GPS tracks your surface swim, Garmin Connect shows everything in one app) and daily wearability. The D4f wins on underwater usability and being purpose-built.
02 Is the Garmin Descent worth $650+ vs $350 for the D4f? +
If you value the smartwatch features independently: yes. You're buying a $350 freedive computer plus a ~$300-400 GPS smartwatch in one device. If you only dive: no, you're overpaying significantly for features you won't use. The calculation depends on how much the smartwatch side of the device would be worth to you separately.
03 Which Garmin Descent model should I buy? +
The Mk3i is the current generation (as of 2026) with AMOLED display and improved sensor accuracy. Earlier Mk1 and Mk2 models are available cheaper and still function well for freediving. The core freediving features haven't changed dramatically across generations.
—— Sources

What this article is based on

  1. AIDA International, the world freediving federationAIDA International
  2. Freediving safetyDivers Alert Network (Alert Diver)
  3. SSI Freediving programs and certification levelsScuba Schools International