Skip to main content
—— Gear Review · Watches ·12 weeks

Mares Smart Apnea

Freediving computer · Bluetooth · 30m depth rating

The best dive-log data access at this price range: Bluetooth sync delivers full depth profiles to your phone after every session, ideal for divers who track training progress carefully.

8.3 / 10
—— Verdict
Recommended for data-focused divers
Mares · Watches
—— Price (USD)
~$200
Affiliate link · disclosed below
—— What we like
  • + Bluetooth sync to companion app, full depth profiles on your phone
  • + Detailed session data: depth profile, surface intervals, dive count
  • + Comfortable form factor
  • + Good display readability at depth
—— What to know
  • − 30m depth rating, adequate for recreational use but tight for serious training
  • − Alarm options less flexible than the Suunto D4f
  • − App dependency can frustrate if phone isn't nearby for sync
Marcus Webb
Marcus Webb
Freediving Instructor & Gear Reviewer
Published · Jul 10, 2025 Updated · Apr 28, 2026
—— Frequently asked

Questions about
Mares Smart Apnea.

01 Is the 30m depth rating a real limitation? +
For recreational diving to 20-25m, it's adequate with a small margin. For divers doing serious depth training or pushing past 25m, the 30m rating is too close to working depth for comfort. The Suunto D4f's 100m rating provides appropriate headroom. If you're consistently diving 20m+, the D4f is the safer choice.
02 How does the app work? +
The Mares Dive app (iOS and Android) syncs via Bluetooth after a session. It shows the full depth profile: depth vs time graphed for each dive, surface intervals as gaps, personal bests highlighted. The data is clean and useful for tracking session-to-session progress.
—— Compare with

Related watches reviews.

freediving-watches

Suunto D4f Review - Best Dedicated Freedive Computer

The reference freedive computer: purpose-built for breath-hold diving, with programmable alarms, surface interval tracking, and a companion app. The standard pick for serious recreational and training divers.
freediving-watches

Cressi Newton Freediving Computer Review - Best Value Entry

Everything a beginner and early intermediate diver needs at half the price of the Suunto D4f: depth, time, surface interval, and a usable log without unnecessary complexity.
freediving-watches

Garmin Descent Review - Best Everyday Watch + Dive Computer

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.
Freediving Guides · 2026 Edition 04