Just Fast vs Fasting Timer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Just Fast
This app tracks both your fasting periods and your eating windows, offering a unique dual-countdown feature. It visualizes metabolic phases like fat burning and ketosis, supports various fasting methods, and provides insights into your progress. It's designed to be user-friendly and privacy-conscious, working entirely offline.
- Eating window countdown
- Fasting phases visualization
- Support for multiple fasting methods
- Streak tracking with grace periods
- Pattern insights
- Weight and BMI tracking
- Smart notifications
- 100% offline functionality
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Just Fast is the intermittent fasting timer that tracks both your fast and your eating window — a combination no other fasting app offers. Whether you're new to 16:8 or pushing into 20:4, OMAD, or custom schedules, Just Fast gives you a clear, distraction-free timer alongside the insights to understand what your body is doing and build habits that stick. EATING WINDOW COUNTDOWN — ONLY IN JUST FAST Most fasting apps tell you when your fast ends. Just Fast also tells you when your eating window closes. Know exactly how much time you have left to eat, so you stop overrunning your window by accident. KEY FEATURES • Eating Window Countdown — track when your eating window closes, not just when your fast ends • Fasting Phases — see fat burning, ketosis, and autophagy stages visualized in real time • All Major Fasting Methods — 16:8, 18:6, 20:4, OMAD, 14:10, 12:12, 24h, and custom durations • Streak Tracking with Grace Periods — maintain your momentum even on tough days • Pattern Insights — review your fasting history and discover your most consistent windows • Weight Tracking with BMI — log weight entries and track progress over time • Smart Notifications — reminders that support your schedule, not disrupt it • Beginner-Friendly Onboarding — choose your goal, fasting expertise, and preferred schedule in minutes • 100% Offline — no account, no signup, no cloud required • 15 Languages — English, German, French, Spanish, Polish, Portuguese, Italian, Japanese, Korean, Arabic, Russian, Swedish, Finnish, Norwegian, Turkish UNDERSTAND YOUR FAST, NOT JUST YOUR TIMER Just Fast visualizes the metabolic phases of fasting as they happen: fat burning begins around hour 12, ketosis deepens past hour 18, autophagy activates beyond hour 24. You do not need a biology degree — the app shows you where you are and what your body is doing. FREE AND LIGHTWEIGHT All core features are free. No subscription. No paywall. Just Fast is also one of the lightest full-featured fasting apps available — under 50MB download, compared to 200MB+ for most competitors. Fast to download, fast to start. Note: The app is free with light banner ads on secondary screens (history, settings). The main fasting timer screen is completely ad-free. PERFECT FOR • Beginners starting their first 16:8 protocol • Intermediate fasters exploring 18:6, 20:4, or OMAD • Anyone who wants fasting phases explained without complexity • People managing multiple fasting schedules across 15 languages • Privacy-conscious users who prefer no-account apps Download Just Fast and start your first fast today — no signup required. --- Privacy Policy: https://justfast.app/privacy Support: support@justfast.app
Fasting Timer
This app tracks intermittent fasting, visualizing your body's biological phases and progress. It offers customizable timers, water tracking, a journal, and gamified elements to motivate users. Monitor body measurements and weight to see your transformation.
- Biological phase tracking
- Customizable fasting timers
- Home screen widgets
- Body measurements and weight tracking
- Water tracking with reminders
- Fasting journal
- Gamified progress with XP and badges
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Nova Fast is the intermittent fasting tracker that shows you what's really happening inside your body — from fat burning to autophagy and cellular renewal. WHY NOVA FAST? Nova Fast combines a powerful fasting timer with real-time biological phase tracking, beautiful widgets, body measurements, water tracking, a fasting journal, and a gamification system that makes fasting fun and rewarding. BIOLOGICAL PHASE TRACKING See your body's real-time fasting stages. Watch as you transition through 7 phases — from burning glucose to entering ketosis, activating autophagy, and triggering deep cellular repair. Understand the science behind every hour of your fast. SMART FASTING TIMER Start any protocol with one tap. Choose from popular intermittent fasting plans including 16:8, 18:6, 20:4, OMAD (23:1), 14:10, and 12:12 — or create your own custom fasting schedule. HOME SCREEN WIDGETS Keep your fasting progress visible with beautiful widgets. See your timer, current biological phase, and streak right from your home screen or lock screen. BODY MEASUREMENTS & WEIGHT TRACKING Track more than just weight. Log body measurements, see your progress over time, and watch your transformation unfold with detailed charts and trends. WATER TRACKING Stay hydrated during your fasts with built-in water tracking and customizable reminders. Proper hydration is essential for maximizing your fasting results. FASTING JOURNAL Document your fasting journey. Log how you feel, what you ate, your energy levels, and any notes. Look back on your progress and find the patterns that work best for you. GAMIFICATION — EARN XP, LEVEL UP, COLLECT BADGES Fasting should be fun. Earn experience points for every fast, level up your profile through 30 ranks, unlock 29 achievement badges, and build streaks that keep you motivated. Turn healthy habits into a rewarding daily challenge. PERFECT FOR BEGINNERS AND EXPERIENCED FASTERS Whether you're just starting with intermittent fasting or you're an experienced faster looking for a better tracker — Nova Fast has everything you need to succeed. Start your fasting journey today. --- LEGAL: Privacy Policy: http://www.jakubl.com/privacy.html Terms of Use (EULA): http://www.jakubl.com/terms.html SUPPORT: support@jakubl.com X: @jakublaszczyk
Screenshots
Verdict
The clearest difference is rating: Just Fast at 5.0 against Fasting Timer's 4.5. Just Fast also leads on update cadence (every 3 weeks vs every 4 months) and ratings volume (7 vs 2). Fasting Timer's advantage is ads (none vs shown) and monetization model (free vs ad-supported). On price, review sentiment, 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. Neither carries in-app purchases, so what you see is what you pay.
Just Fast holds the better App Store score, 5.0 against 4.5. Both are backed by a comparable volume of ratings — 7 and 2 respectively. Written reviews split almost evenly too, at 100% and 100% positive.
Just Fast ships an update every 3 weeks, Fasting Timer every 4 months. The most recent releases landed on September 20, 2026 and September 7, 2026 respectively.
| Parameter | Just Fast | Fasting Timer |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (7 ratings) — better | 4.5 (2 ratings) |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 7 — better | 2 |
| Update frequency | Every 3 weeks — better | Every 4 months |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | Ad-supported | Free — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 14.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 47 MB | 10 MB |
| Age rating | 17+ | 4+ |
| Developer | Adrian Cabala | Jakub Laszczyk |
Customer experience
Just Fast
Fasting Timer
In-app purchases
Just Fast
No in-app purchases
Fasting Timer
No in-app purchases
Questions
Is Just Fast free?
Is Fasting Timer free?
Which has better reviews, Just Fast or Fasting Timer?
Do Just Fast or Fasting Timer have ads?
Which is updated more often, Just Fast or Fasting Timer?
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