Zero Fast vs Vela

Your fast, explained as it happens. Zero Fast times your fast, shows you the moment your body switches to fat-burning and ketosis, and lets you race friends in group challenges. No calorie counting. No strict diets.

See what your body is doing, hour by hour. Vela tracks all phases of fasting, from digestion to Immune reset, with science explained clearly. Every protocol from 12:12 to 72 hours is free, forever. WHAT MAKES VELA DIFFERENT • Real biology, not buzzwords. Every fasting phase explained with science you can actually read. • Premium minimalist design. Editorial typography. Dark mode that respects your eyes. • Multi-language from day one (English, Spanish, Portuguese). • Anti-diet positioning. No shame loops, no leaderboards, no gamified bodies. Just a calm tool. EVERY PROTOCOL. FREE. • 12:12. Beginner • 14:10. Beginner • 16:8. Most popular • 18:6. Intermediate • 20:4. Advanced • OMAD (23:1). Advanced • 24h. Extended • Up to 72h. Extended The timer is never paywalled. WHAT YOUR BODY IS DOING, HOUR BY HOUR See every phase of fasting: 1. Digestion (0–4h) 2. Post-absorptive (4–8h) 3. Fat mobilization (8–12h) 4. Early ketosis (12–18h) 5. Autophagy (18–24h) 6. Deep fast (24–48h) 7. Peak autophagy (48–72h) 8. Immune reset (72h+) The science behind each phase is included free, with smart phase-shift notifications and the Apple Watch app. VELA PRO. $39.99/year or $5.99/month. Includes a 7-day free trial. No dark patterns. The free version stays fully usable. Pro adds: • Personalized insights based on your fasting patterns • Complete statistics and data of every fast you complete • Monthly summary exports • Home Screen widgets Pro • Pro achievements • All future premium features THE BLUE FLAME On day 7, the flame turns blue. Vela's signal that your body has adapted, when fasting stops being a habit and becomes who you are. No badges. No points. Just a quiet moment of recognition. WHEREVER YOU NEED IT • Apple Watch. Start, monitor, and end your fast from your wrist. Free. • Lock screen notifications. Only the moments that matter. Free. • Home Screen widgets (Pro). Current phase, next fast, lifetime stats. PRIVACY Your data is yours. End-to-end auth, encrypted in transit and at rest. No third-party ads. No data sold. NOT MEDICAL ADVICE Vela is a tracking and education tool, not a substitute for medical advice. If you have a medical condition, are pregnant, or take medication, consult your physician before starting any fasting protocol. Privacy Policy: https://www.velafast.com/privacy Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Support: https://www.velafast.com/contact