OpenFugu

for the eFugu freediving pressure equalization trainer

An open-source Android app that streams live nasal pressure over Bluetooth LE and turns equalization practice into fun exercises and games that reward control, not force.

View source on GitHub Google Play · coming soon

Live pressure

A real-time readout and chart you can pause, scroll, and zoom. Each connected device gets its own color.

Exercises

Find the smallest pressure that reliably equalizes, or hold a steady sub-maximal range, scored on consistency.

Games

Fugu Reef, Feast, Cave, and Flow: arcade modes where pressure steers your fugu and precision wins.

Local multiplayer

Race 2–7 fugu through the same reef on one phone. Last fugu standing.

For instructors

Connect several devices at once, with per-diver profiles and a guided calibration wizard.

Sessions

Exercises and games save automatically. Replay them on a full chart, check your stats, and share.