OPUMP vs Beluga

As the first FDA-approved breathing trainer, OPUMP finally meets you. Used for respiratory muscle training, OPUMP is the first intelligent breathing trainer that can be used independently and connected to OPUMP App to test inspiratory capacity, have breathing training, learn different breathing methods, and track the progress. OPUMP Breathing Trainer Features: - Test inspiratory and expiratory vital capacity; - Various breathing training methods; - Analysis of historical breathing records; - Added: Breathing training game, breathing training course. Disclaimer: OPUMP is not a medical device and should not be used to diagnose or treat any medical condition. The data reflected in the product is for reference and used for APP content only. Please consult a doctor if you need any medical advice. (PS. OPUMP has completed the FDA registration in the United States and obtained the medical device certification in China.)

Beluga is a clean, focused breath-hold timer for freedivers and spearfishers, built to run your apnea training without getting in the way. YOURS, AND ONLY YOURS - 100% offline: no account, no login, no network, ever - No ads, no tracking, no analytics, no data collection of any kind - Everything stays on your device - Export and import your records, custom tables and settings whenever you want, and you choose where they go TRAINING MODES - CO2 tables: build tolerance to carbon dioxide with shrinking rest intervals - O2 tables: extend your breath-hold with growing hold times - Static apnea: open-ended holds tracked against your personal best - Lung stretching: full-lung and empty-lung routines to build flexibility and lung compliance - Custom tables: build your own rounds, rest and hold, exactly how you train VOICE GUIDANCE Calm spoken cues walk you through every phase: phase changes, mid-phase checkpoints, and a final countdown, so you can keep your eyes closed and stay relaxed. All speech is generated on your device. BUILT FOR REAL SESSIONS - A background-safe timer keeps accurate time even when your screen is off, backed by local notifications - Log contractions as they happen - Review every session in a calendar history - Track your progress with clean stats: personal best, weekly frequency, completion rate Beluga is completely free. Train safe. Never freedive alone, and never practice breath-holds in or near water without qualified supervision.