Holdfast: Freedive Trainer

Holdfast is a calm, focused breath-hold trainer for freedivers, spearos, and anyone learning to sit comfortably with the urge to breathe. Run proven CO₂ and O₂ tables on your iPhone — or entirely on your Apple Watch, screen-off and haptic-guided — so every session feels effortless. WHY HOLDFAST - CO₂ tables to blunt the urge to breathe; O₂ tables to extend your hold. - Guided sessions with gentle haptic and audio cues — eyes closed, no screen needed. - Built for Apple Watch: start, run, and finish a full session from your wrist, screen-off, driven by taps. - Progress that motivates: history, streaks, personal bests, and clean charts. - Heart rate during holds via Apple Health (optional). - 100% offline. No account, no sign-up, ever. FREE FOREVER - The full CO₂ and O₂ table trainer, on iPhone and Apple Watch. - Session history, streaks, and personal bests. HOLDFAST PREMIUM - Custom table builder — design your own ramps. - Training plans — structured, progressive programs. - Advanced analytics — deeper trends and recovery insight. TRAIN SAFELY Holdfast is for dry training only. Never practice breath-holding in or near water alone, and never hyperventilate. Shallow-water blackout gives no warning. Stop immediately if you feel dizzy, lightheaded, or tingling, and talk to a doctor before starting breath-hold training if you have heart, lung, blood-pressure, or pregnancy concerns. PRIVATE BY DESIGN Everything runs on your device. No account, no tracking; your health data stays in Apple Health. — Holdfast Premium is an auto-renewing subscription. - Monthly $3.99 / Annual $29.99, with a 7-day free trial (USD; prices vary by region). - Payment is charged to your Apple ID at confirmation of purchase. - It renews automatically unless auto-renew is turned off at least 24 hours before the end of the current period; your account is charged within 24 hours prior to renewal. - Manage or cancel anytime in your App Store account settings. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: [your privacy URL]