Profast vs LeanFast
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Profast
This app helps you track intermittent fasting with a smart timer, personalized phases, and detailed progress insights. It also features an AI food scanner for meal tracking and supports various fasting protocols and religious traditions. Connect with friends for shared fasting challenges.
- Intermittent fasting timer
- Smart phase tracking
- AI food scanner
- Calorie, protein, and water tracker
- Weight tracking
- Buddy and group fasting
- Religious fasting support
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FAST SMARTER. LIVE BETTER. Profast is the intermittent fasting app built for real life — whether you fast for health, weight loss, or faith. Beautiful timer. Smart phases. Zero ads. No account required. YOUR FAST. YOUR WAY. Choose from 16+ fasting protocols: · 16:8 — the gold standard · 18:6 — for deeper fat burning · 20:4 — advanced fat loss · OMAD — one meal a day · 5:2 — eat normally 5 days, restrict 2 days · 14:10 — perfect for beginners · Custom — set your own hours Start your fast with one tap. Profast does the rest. WHAT YOUR BODY IS DOING Most people fast without knowing what's happening inside. Profast shows you — hour by hour. · Fed State (0–4h) Digesting your last meal · Early Fasting (4–8h) Blood sugar stabilising, insulin dropping · Fat Burning (8–12h) Your body switches to fat for fuel · Ketosis (12–18h) Ketones being produced, mental clarity peaks · Deep Ketosis (18–24h) Peak fat burning · Autophagy (24h+) Cellular repair and renewal begins Watch your body work. Every single fast. TRACK YOUR PROGRESS · Beautiful circular fasting timer · Real-time phase tracking · Edit past fasts anytime · Fasting history calendar · Streak counter — don't break the chain · Milestone badges and challenges · Weekly progress insights · Progress charts and history EAT SMARTER DURING . YOUR EATING WINDOW AI FOOD SCANNER - Point your camera at any plate. Profast instantly identifies your meal and calculates calories, protein, carbs and fat. Works for every cuisine — Indian, Western, Asian, Middle Eastern. CALORIE TRACKER Know exactly what you're consuming during your eating window. Hit your daily calorie goal. PROTEIN TRACKER Fasting reduces your eating window. Make every bite count — track protein to protect muscle. WATER TRACKER Stay hydrated through your fast. Log intake, set daily goals, get reminders throughout the day. WEIGHT TRACKER Log your weight. See your trend. Watch your progress week by week. CELEBRATE EVERY WIN Every fast completion generates a beautiful shareable card — ready for WhatsApp, Instagram Stories, or anywhere you share. · 7-day streak card · 30-day milestone card · Personal best card · Festival completion card Your achievement. Beautifully captured. Instantly shareable. FAST TOGETHER - Buddy Fast Feature · Invite your partner, friend or family to fast with you. See each other's progress live. · Send one-tap cheers. Build combined streaks. GROUP FASTING · Create a group fast for Navratri, Ramzan or any challenge. · Live leaderboard, combined hours, group celebration when everyone completes. RELIGIOUS FASTING Profast supports major religious fasting traditions with auto-populated dates: Ekadashi · Navratri · Karva Chauth · Maha Shivratri · Ramzan · Lent · Good Friday · Ash Wednesday · Yom Kippur · Daniel Fast · Jain fasts One tap to start. Your tradition, respected. PRIVACY. BY DESIGN. Your personal fasting data never leaves your device. · No account required · No ads. Ever. · No data selling · No cross-app tracking · Everything stored locally on your phone We don't see your data. We can't. That's the point. PROFAST PREMIUM Core fasting is free. Always. Premium unlocks everything: · All 16+ fasting plans · AI food scanner · Calorie and protein tracking · All religious fasting modes · Advanced progress charts · All challenges and badges · Unlimited fasting history Cancel anytime through App Store. Fast smarter. Live better. Profast. Terms of Use (EULA): https://profastapp.com/terms Privacy Policy: https://profastapp.com/privacy
LeanFast
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Plan, track and keep up your intermittent fasting, with water, weight and food in one place. LeanFast shapes a plan around your body and your week, shows Fasting or Eating at a glance, logs your fasts, water, meals and weigh-ins, and suggests recipes for your eating window. No ads, no trackers, AI that stays on your device, and safety built in. Free to start. WHY LEANFAST • No ads, ever. No trackers, and your data is never sold. • Private AI: with Apple Intelligence, Coach answers your questions on your device, with the sources behind each answer, and Lens reads labels and barcodes there too. Smart Lens is optional, runs in Europe and doesn't keep your photo. • Safety first: a short health check adapts your plan, and "I don't feel well" stops your fast and calls the local emergency number in 234 countries and territories. • Backed by science: every source is listed in Settings › Health sources. • Accessible: VoiceOver, Dynamic Type at every size and Reduce Motion. • Everywhere: iPhone, iPhone Duo, iPad and Apple Watch. ALWAYS OBVIOUS One big word tells you where you are: Fasting, Eating or Not fasting, on Today, your Lock Screen, widgets and Apple Watch. Tap Start fast in the evening reminder, or turn on Autopilot: every planned fast starts when your eating window closes and ends when the next one opens. PLANS AS UNIQUE AS YOU LeanFast recommends Spark (from 12:12), Flow (the classic 16:8) or Blaze (longer fasts) and eases you in over four weeks. Shape every day on a 24-hour dial: brunch on Sunday, a late dinner on Friday, rest days when you need them. A TIMER YOU CAN GLANCE AT Follow your body stage by stage, with a new explanation at each milestone, on your Lock Screen, in the Dynamic Island, widgets and Control Center. Siri can start your fast, and the Watch app keeps going when your iPhone is out of range. MOTIVATION THAT'S GOOD FOR YOU Weekly challenges and levels reward consistency, water and logging, never longer fasts. A sick day never breaks your streak, and friendly water reminders let you log a glass from the notification. LEANFAST PRISM • Lens: a Fast-Friendly grade, nutrition facts and healthier swaps for any meal, label or barcode. • Kitchen: 96 photographed recipes to break your fast, with cook mode, timers and a shopping list. • Coach: a weekly review, answers to your questions and a nudge when your plan should change. • Deep insights: weight trend, goal forecast, consistency calendar and time in each stage. • Ring themes, app icons, progress photos, Streak Shields and custom fasts. WORKS WITH APPLE HEALTH Fill in your profile from Apple Health, import weigh-ins from your smart scale and save the weight and water you log. You choose what's shared. PRICING Free to use, no account needed. Prism is available monthly or yearly (each with a 7-day free trial) or as a one-time lifetime purchase. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period; manage them in your Apple Account settings. LeanFast provides general wellness information and is not a medical device or a substitute for professional medical advice. Terms: https://lean-fast.com/terms Privacy: https://lean-fast.com/privacy
Screenshots
Verdict
The clearest difference is ads: LeanFast at none against Profast's shown. LeanFast also leads on update cadence (every 4 days vs every 9 days). Profast's advantage is iOS requirement (18.1 vs 26.1). On price, in-app purchases and device support 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. Profast sells 6 in-app purchases, starting at $4.99 per 7 days and LeanFast sells 3 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.
Profast ships an update every 9 days, LeanFast every 4 days. The most recent releases landed on October 22, 2026 and October 31, 2026 respectively.
| Parameter | Profast | LeanFast |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 9 days | Every 4 days — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, Apple Watch | iPhone, iPad, Apple Watch |
| Requires iOS | 18.1 — better | 26.1 |
| Further details — not scored | ||
| Size | 142 MB | 47 MB |
| Age rating | 4+ | 12+ |
| Developer | Deepak Sharma | Hajer Trabelsi |
In-app purchases
Profast
- Profast Weekly$4.997 Days
- Profast Monthly$14.991 Month
- Profast Annual$49.991 Year
- 10 Scan Credits$2.99
- 50 Scan Credits$8.99
- 200 Scan Credits$29.99
LeanFast
- Prism Monthly7 Days trial$3.991 Month
- Prism Yearly7 Days trial$29.991 Year
- Prism Lifetime$49.99









