How can we help?
Answers to common questions, plus how to restore or cancel Premium. Still stuck? Email us and a person will reply.
Contact
Email support@holdfast.app. If something isn’t working, tell us your iPhone and Apple Watch models and your iOS version.
Frequently asked questions
Is it safe?
Holdfast is for dry training only: seated or lying down, on land. Never practice breath-holds in or near water alone, and don’t hyperventilate before a hold. Shallow-water blackout gives no warning, and CO₂ tolerance does not protect you from it. Stop if you feel dizzy or unwell. Holdfast is a training aid, not a substitute for proper freediving instruction.
Do I need an Apple Watch?
No. Every table runs on iPhone alone. With an Apple Watch, sessions run on your wrist with the screen off and a haptic cue for each phase, and the watch reads your heart rate live.
What’s free?
The breath check, personalized and standard CO₂ and O₂ tables, Apple Watch sessions with haptics and live heart rate, your history and personal bests, and share cards. No ads, and no time limit.
What does Premium add?
Multi-week programs, the custom table builder, and advanced analytics. Premium is a monthly or yearly subscription, or a one-time Lifetime purchase, and the app shows the price in your local currency. If a subscription ends, your tables and history stay, and an active program pauses until you come back.
Does it work offline?
Yes. Tables, the breath check, your history and Apple Watch sessions all work in airplane mode, and there’s no account to create. You only need a connection to buy or restore Premium.
Which languages?
English and Spanish. The app follows your iPhone’s language setting.
Restore purchases
Bought Premium before, or on another device with the same Apple ID? Open Holdfast, go to Settings › Holdfast Premium, and tap Restore purchases. Make sure you’re signed in to the App Store with the Apple ID you used to buy it.
Cancel a subscription
Subscriptions are billed and managed by Apple, so you cancel them in your Apple account, not in the app:
- Open the Settings app on your iPhone.
- Tap your name, then Subscriptions.
- Choose Holdfast and tap Cancel Subscription.
Cancel at least 24 hours before the renewal date to avoid the next charge. Premium stays on until the end of the period you’ve paid for, and your tables and history stay either way. Apple’s guide: Cancel a subscription from Apple.
Lifetime is a one-time purchase, so there’s nothing to cancel. For a refund, use Apple’s Report a Problem page.
Redeem a code
Got an offer code? In the App Store app, tap your photo at the top right, then Redeem Gift Card or Code.
Apple Watch
Holdfast installs on your Apple Watch together with the iPhone app. If it’s missing, open the Watch app on your iPhone, scroll to Available Apps, and tap Install next to Holdfast.
Apple Health
Holdfast never asks for Health access when you open it. It offers once, after your first completed session, and you can turn it on or off later in Holdfast’s Settings or in iPhone Settings › Privacy & Security › Health › Holdfast. With access on, sessions are saved as mindful minutes and the app can show your heart rate.
Never practice breath-holds in or near water alone — shallow-water blackout gives no warning. No hyperventilation. Stop immediately if you feel dizzy or unwell. Holdfast is a training aid, not a substitute for proper freediving instruction.
See also the Privacy Policy and Terms of Service.