- + 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
- − 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
Overview
The Mares Smart Apnea fills a gap between the Cressi Newton (basic log, no app) and the Suunto D4f (better alarms, app, higher price). Its defining feature is the Bluetooth sync: full depth profiles to your phone after every session, accessible without cables or PC software. The Mares Puck Pro+ covers the same apnea metrics but downloads its log over a cable.
For divers who track training seriously (comparing sessions week to week, looking for consistent depth improvements) the app integration is a meaningful tool. You can see where in the ascent you're being inconsistent, which surface intervals are too short, which dives are hitting target depth.
The 30m depth rating is the purchase caveat to check against your training depth. Recreational divers to 20m: fine. Divers pushing 25-28m: the margin is uncomfortably tight. Buy the D4f instead.