Mulbyul - Freediving Training

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Everyone
1+
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Content rating
Everyone
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About this app

Mulbyul is a dry-training routine app for freedivers.

Build repeatable hold-and-rest workouts you can do on dry land — like CO2 tables — run them with a step-by-step timer, and log every result. Organize the routines your coach gives you or the ones you do most, and watch your progress day by day.

■ Your own training routines
· Combine hold and rest steps to build exactly the routine you want.
· Save coach-prescribed or go-to routines and start them in one tap.
· Or jump straight in with the built-in preset routines.

■ Step timer and contraction logging
· Follow your routine through its rest and hold phases.
· Tap once to mark your first diaphragm contraction during a hold.
· Record both your target and actual time for every set.

■ Safety first
· A safety notice appears before every session.
· Stop immediately if you feel dizzy.
· Never train in water alone.

■ Track and reflect
· Log target time, actual time, and contraction timing for each set.
· Review past sessions and plan your next one.

■ Made for
· Freedivers doing dry training at home on weeknights
· Students following a coach's routine consistently
· Anyone who wants to track their breath-hold progress properly

Build your training, one session at a time, with Mulbyul.

Note: Mulbyul is a tool for dry training in a safe environment. Never practice breath-hold training in water without a qualified buddy.
Apnea, CO2 tables, breath hold
Updated on
Aug 29, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
  • This app may share these data types with third parties
    Location, App activity and 2 others
  • This app may collect these data types
    Location, App activity and 2 others
  • Data is encrypted in transit
  • You can request that data be deleted

What’s new

Initial release of Mulbyul. Create dry-training routines, follow timed hold and rest steps, log contractions and results, and connect with Wear OS during training.