Fasting Well vs Burn
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Fasting Well
Track your intermittent fasting journey with science-backed insights. Monitor your progress through different metabolic stages and view your history with a visual heatmap. Offers built-in plans and detailed scientific articles.
- Stage-aware fasting progress visualization
- Live timer with customizable ring
- Six built-in fasting plans
- Journal and weekly progress charts
- Science-backed articles on fasting
- Calendar heatmap of activity
- Privacy-first, on-device data storage
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Fasting Well is a beautiful, science-grounded intermittent fasting tracker. Designed for the moments your fast actually happens — at home, in transit, before bed — with the kind of polish you'd expect from an app you open every day. EVERY FAST IS A JOURNEY A fast isn't a single state — it's a sequence. Anabolic. Catabolic. Fat-burning. Ketosis. Deep ketosis. Fasting Well shows you exactly where you are in that journey, with stage-aware visuals and a quiet narration of what's happening inside. WHAT YOU GET (FREE) • Live timer with the ring you'll want to watch • Six built-in plans: 16:8, 18:6, 20:4, OMAD, 24h, 36h • Stage-aware progress: see Anabolic → Ketosis unfold • Notifications when you cross a stage or hit your goal • Journal of your last 30 days with a weekly chart • Five long-form science articles, beautifully illustrated • Calendar heatmap of recent activity • Dark and light themes that look right on every screen WHY ANOTHER FASTING APP Because the popular ones either gutted their free tier or never felt like apps you'd open without a reason. Fasting Well is built to be the home screen icon you actually like seeing. PRIVACY-FIRST Your fasts and weight data stay on your device — no account, no cloud sync, no servers we own. To make the app better we collect anonymous usage signals (e.g. "a fast was started on the 18:6 plan" or "an article was opened") through PostHog. These contain no personally identifying information and can be turned off entirely in Settings → Privacy. SCIENCE-BACKED, NOT WELLNESS-HYPE Built on peer-reviewed fasting research. No talk of "detox." No supplements to sell. Just the metabolic story your body is actually telling. FASTING WELL PRO Go deeper with Pro: build custom fasting protocols, log your weight and watch the trend, unlock advanced statistics (12-week heatmap, completion rate, best streak), share beautiful fast cards, and pick from every accent color. Pro is a monthly or annual subscription, or a one-time lifetime purchase — and the core tracker stays free forever. QUESTIONS, FEEDBACK hello@fastingwell.app We're a small team. Every email gets read. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://fastingwell.app/privacy
Burn
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Snap your plate or type what you ate. Burn splits it into foods and portions, and you check each one before anything is logged. After two weeks of logging and a few weigh-ins, Burn estimates what you actually burn in a day, from your own numbers. The food diary is free to use, with macros, barcode scanning and label reading, and no Burn account. AI meal scans come with Burn Pro. SNAP YOUR MEAL. CHECK EVERY FOOD. With Burn Pro, take a photo of your plate or type a few words. Burn's AI splits your meal into foods, portions and calories, then shows you each one before anything is logged. Change a portion, swap a food or add one it missed. AI results are estimates, and you always make the final call. CALORIES LEFT, AT A GLANCE Today shows the calories you have left in one clear ring, with protein, carbs and fat below. Connect Apple Health and your activity can count too. LOG ANYTHING IN SECONDS Search foods, scan a barcode, photograph a nutrition label or quick-add calories. Recent foods, saved foods and your own recipes are a tap away, with real portions like cups, slices and grams. YOUR REAL DAILY BURN, LEARNED FROM YOU Calorie formulas are only a starting point. After a few weeks of logging and weigh-ins, Burn's weekly check-in estimates how many calories you actually burn, shows how sure it is and explains how it worked it out. Your target changes only when you choose to change it. PROGRESS YOU CAN SEE Trend weight smooths out daily ups and downs so you can see where you are really heading. Weekly calories, streaks and every weigh-in live in one place. ON YOUR HOME SCREEN AND LOCK SCREEN Widgets show calories and macros left without opening the app. WORKOUTS See steps, active energy and workouts from Apple Health, or log exercise yourself. PRIVATE BY DESIGN No Burn account and no sign-up. Your food diary is kept on your iPhone and in your own device backups. Export your records whenever you like. A photo or text is sent for analysis only when you ask Burn to scan a meal. FREE TO USE, WITH BURN PRO WHEN YOU WANT IT Manual logging is free: food search, barcode scanning, quick add, recipes, macros, weight tracking and the weekly check-in. Burn Pro adds AI meal scans by photo or text, Home Screen and Lock Screen widgets, and a personal maintenance range when you maintain. Eligible new subscribers can try Burn Pro free for 7 days with the yearly plan. A monthly plan is also available. Payment is charged to your Apple Account when you confirm the purchase (for the yearly plan, when the free trial ends). Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period. Manage or cancel any time in your App Store account settings. Burn gives estimates, not medical advice. Talk to a healthcare professional before making big changes to what you eat. Burn's calorie guidance is for adults 18 and over. Privacy Policy: https://burn.campflame.dev/privacy/ Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is in-app purchases: Fasting Well at none against Burn's 4. Burn's advantage is update cadence (every 3 days vs every 3 months). On price, ads, device support and iOS requirement there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Burn sells 4 in-app purchases, starting at $5.99 per month. Fasting Well asks for nothing beyond the download.
Fasting Well ships an update every 3 months, Burn every 3 days. The most recent releases landed on October 13, 2026 and October 25, 2026 respectively.
| Parameter | Fasting Well | Burn |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 3 months | Every 3 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Freemium | — |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 17.0 | 17.0 |
| Further details — not scored | ||
| Size | 45 MB | 53 MB |
| Age rating | 4+ | 12+ |
| Developer | Generalizable | Waitery Inc |
In-app purchases
Fasting Well
No in-app purchases
Burn
- Burn Pro Monthly$5.991 Month
- Burn Pro Monthly$9.991 Month
- Burn Pro Annual7 Days trial$19.991 Year
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- Burn Pro Annual7 Days trial$29.991 Year









