Mulbyul - Freediving Training
Apnea, CO2 tables, breath hold
Free
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.
■ Routine generation and sync
· On supported devices, draft a CO2-style dry-training routine from a single line of text.
· Routines are stored on device and can sync via CloudKit depending on your Apple account and iCloud setup.
■ 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.
Ratings & Reviews
- This app has not received enough ratings or reviews to display an overview.
One breath deeper. Training, smoother than ever.
We’ve refined the whole flow—from building a routine to training and reviewing your records.
• Added goal-based starter routines. On supported devices, AI can also draft a routine tailored to your goals.
• Routine editing, countdowns, and transitions during training now feel more natural.
• “Completed” and “successful” are now clearly separated, so success rates and results are more accurate.
• Backing up, restoring, and sharing records is easier.
• Refined layouts and interactions across iPhone, iPad, and Apple Watch, with stronger language and accessibility support.
• In-app web pages now show loading progress.
Hold your breath, not your patience.
Dive safely—one breath at a time.
The developer, InnoSquad, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Identifiers
- Usage Data
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Health & Fitness
- Identifiers
- Usage Data
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Provider
- InnoSquad
- Size
- 183.7 MB
- Category
- Health & Fitness
- Compatibility
Requires iOS 26.0 or later.
- iPhone
Requires iOS 26.0 or later. - iPad
Requires iPadOS 26.0 or later. - Mac
Requires macOS 26.0 or later. - Apple Vision
Requires visionOS 26.0 or later. - Apple Watch
Requires watchOS 26.0 or later.
- iPhone
- Languages
English and 7 more
- English, Arabic, German, Japanese, Korean, Simplified Chinese, Spanish, Traditional Chinese
- Age Rating
13+
- 13+
- Contains
Advertising
Health or Wellness Topics
- Copyright
- © 2026 InnoSquad