Draft entry. Specs not yet verified against the manufacturer.

Ratio

Ratio iDive Free

A freediving-focused watch computer with Taravana and hemoptysis-risk guidance, plus basic scuba mode.

Cable sync only (libdivecomputer)

Third-party apps can read it, but only over a USB/serial cable, not wirelessly.

Ratio iDive Free
Released—
Max depth rating220m
AlgorithmBühlmann ZHL-16B (scuba mode)
Air integrationnone
Wireless—
Display80x80 pixel matrix display, sapphire crystal
Batteryrechargeable
Digital compassYes
Gas typesair, nitrox
Gas switches—
CCR capableNo
Pros
  • Monitors recovery time between freedive runs to help manage Taravana risk
  • Guides progressively deeper repeat dives to reduce hemoptysis risk in a session
  • Corrosion-resistant 316L stainless steel case, 3D compass, barometer, and weather forecast
Cons
  • Freediving-first design, basic single-gas scuba mode only, no multi-gas support
  • No single authoritative USD price found, a single Amazon listing (as SalviMar iDive Free) showed ~$567 but was out of stock, no confirmed official US price
  • Smaller support network in North America than major dive-computer brands

The iDive Free is Ratio’s freediving-first entry in the iDive watch line, built around Taravana and hemoptysis-risk monitoring between dive runs, with a basic air/single-nitrox scuba mode included.