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—— Gear Review · Watches ·8 weeks · mixed use

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
Marcus Webb
Marcus Webb
Freediving Instructor & Gear Reviewer
Published · Jul 2, 2025 Updated · Apr 28, 2026
—— 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.
—— Compare with

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Freediving Guides · 2026 Edition 04