Ultimate Fasting

The fasting app that catches your cheat coffee.

Android

Health & Fitness

Wearables

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Hey Product Hunt 👋 I lied to my fasting app every day for six months. Every morning: tap „start fast", drink coffee with milk, ignore the 80 kcal, pretend my 18-hour window was clean. Weight stalled. The app kept congratulating me. So I built one that doesn't trust me. Ultimate Fasting reads your food tracker via Health Connect — MyFitnessPal, Yazio, Cronometer, Samsung Health — and shows what you actually ate inside your fast window. Sneak a latte? It's logged. Calorie surplus instead of a deficit? You'll see it before the scale does. The app stops lying to you because you can't lie to it anymore. That's the entire pitch. 🛠️ How the Smart Coach actually works I want to be upfront: there's no LLM here, no „AI" theatre, no monthly token bill behind the curtain. The Smart Coach is a deterministic decision tree branching on your fasting hours, weight trend, steps, sleep, and intake — built carefully, validated against real users for 6 months. Weight predictions use regression on your own history, not someone else's „we trained on millions of users" black box. Boring? Maybe. Honest? Yes. Your data leaves your phone? Never, unless you opt in. 🎯 Three things make this app different 1. Real verification, not self-reporting The Intake-During-Fast card pulls live nutrition from any Health Connect food app and shows your real energy balance: deficit · surplus · clean. Goodbye „I forgot the cream". 2. Spiritual fasting, taken seriously Most fasting apps stop at 16:8. I shipped: Astronomical Ekadashi calculations (cross-validated with drikpanchang.com for the Smartha/Vaishnava split), three food modes — Nirjala · Phalāhārī · Naktabhoji — and a full food guide Orthodox Christian fasting calendar Ramadan + Islamic voluntary fasts (Mondays, Thursdays, Ayyam al-Bīḍ) All free. No paywall on faith. 3. Smart Coach with three personalities Pick the voice that doesn't make you cringe: Motivating (free) — „You got this, two more hours 💪" Scientific (Pro) — „Autophagy peaks around hour 16 — keep going" Calm (Pro) — „Breathe. Hunger is a wave, not a wall." Same rule engine. Different soul. 📦 Everything else included 14-day weight sparkline · 4-week weight prediction with confidence intervals · daily deficit/surplus row · pace warnings with actionable suggestions (rate per week or date push) · Wear OS companion ( start / stop your routine ) · three home widgets (Aurora 4×4 premium clock · compact card · mini tile) · clean-fast streaks · seasonal achievements (Christmas, Valentine's, Ekadashi runs) · leaderboards (Google sign-in) · weekly + monthly insight dashboards · custom protocols · encrypted backup & cloud sync (optional) · offline-first SQLite · share cards · interactive first-launch tour · 8 themes · 13 languages (EN, BG, DE, ES, FR, HI, JA, KO, NL, PT, RU, ZH, AR). 🛣 Roadmap BMI / health-safety rails on goal-setting Multi-horizon weight forecast (1 w / 4 w / 8 w) iOS launch (Android-first today · iOS Q4) 🙏 What I'd love your feedback on Verification angle — does it click in 5 seconds, or does it need more onboarding to land? Spiritual fasts visibility — non-Hindu / non-Orthodox users: are the sections invisible enough when not relevant? Pricing — Pro comes in monthly, yearly, and lifetime tiers. Lifetime is rare in this space (Zero / Fastic / Simple are subscription-only). Fair tiering? Should I drop one?