Comparison

Rhythm Fasting vs FastJoy

Price, ratings, monetisation and update history for both apps, side by side โ€” with what reviewers say about each.

Head to head
About

Rhythm Fasting

Features
Read full description

Rhythm Fasting is your smart, minimalist intermittent fasting companion. Start a fast with a single tap, follow your daily eating window, and build a healthy rhythm that actually sticks โ€” no clutter, no ads, just the tools you need. Whether you're new to fasting or a seasoned faster, Rhythm Fasting adapts to you. Choose a plan like 16:8, 18:6, 20:4, or OMAD, set your weekly schedule, and let the timer and reminders keep you on track. WHY YOU'LL LOVE IT โ€ข One-tap fasting timer with a live countdown โ€ข Clean, distraction-free design โ€” completely ad-free โ€ข Works in 10 languages โ€ข Your data stays yours, synced privately to your Apple account FASTING MADE SIMPLE โ€ข Popular plans built in: 16:8, 18:6, 20:4, OMAD, and more โ€ข Set a custom eating window for each day of the week โ€ข See your current phase, countdown, and a 24-hour timeline at a glance โ€ข Live Activity and a Home Screen widget keep your timer one glance away โ€ข Smart reminders for when it's time to fast or eat TRACK YOUR PROGRESS โ€ข Log your weight and watch your trend toward your goal โ€ข Track body measurements โ€” chest, waist, hips, and more โ€ข Water intake tracking with a daily hydration goal โ€ข Detailed reports: streaks, success rate, longest fast, and history โ€ข Celebrate streak milestones as you stay consistent STAY MOTIVATED โ€ข Helpful tips during fasting and eating windows โ€ข A weekly summary of how your fasting week went โ€ข Gentle nudges so you never lose your streak PRIVATE & YOURS โ€ข Sync with your Apple Account and back up to iCloud Drive โ€ข Export your data to CSV anytime โ€ข No accounts, no tracking, no ads RHYTHM FASTING PRO Upgrade to Pro to unlock advanced fasting plans, body-measurement tracking, detailed analytics, custom weekly scheduling, and smart daily reminders. The core timer and tracking stay free, forever. Build your rhythm. Feel the difference. Download Rhythm Fasting today. -- Intermittent fasting is a lifestyle choice and not medical advice. Consult a healthcare professional before starting any fasting or weight-loss program, especially if you are pregnant, nursing, or have a medical condition.

About

FastJoy

Features
Read full description

FastJoy is the simple, private way to track intermittent fasting. Pick a protocol, start the timer, and watch your fasting and eating windows in real time โ€” no account, no paywall on the core timer, and everything stays on your device. WHY FASTWINDOW - Beautiful animated fasting timer with live elapsed time and progress ring - Choose 16:8, 18:6, 20:4, OMAD or a custom fasting window - Informational fasting stages as the hours add up (fat burning, ketosis, autophagy zone) - Current streak, today's eating window and target end time at a glance - Edit your start time anytime โ€” perfect when you forget to hit start TRACK EVERYTHING - Full history of every fast with met-goal status - GitHub-style consistency heatmap of your fasting days - Weekly fasting hours and calendar overview STATS & PROGRESS - Average fast length, longest fast, completion rate and streaks - Fast-duration trend chart and this-week-vs-last comparison - Patterns by weekday and start time of day - Optional weight log with a clean trend chart - Dozens of achievements to keep you motivated REMINDERS THAT HELP - Get notified the moment your fasting goal is reached - Optional "time to start fasting" and hydration reminders - 100% local notifications โ€” no servers, no tracking of your habits PRIVATE BY DESIGN - No sign-up, works fully offline - Optional Face ID / Touch ID lock - Export and import your data as JSON anytime - Available in English, Spanish, French, Italian, German and Portuguese FastJoy is a tracking aid only and does not provide medical or nutritional advice. Intermittent fasting is not suitable for everyone, including during pregnancy or with certain medical conditions. Consult a qualified healthcare professional before changing your eating patterns. Start your first fast today and build a routine that lasts.

Screenshots

Rhythm Fasting4 screens
FastJoy4 screens

Verdict

The call

The clearest difference is price: FastJoy at Free against Rhythm Fasting's $9.99. FastJoy also leads on in-app purchases (none vs 3) and iOS requirement (13.0 vs 17.6). Rhythm Fasting's advantage is ads (none vs shown). On device support there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

FastJoy is free to download; Rhythm Fasting costs $9.99 up front. Rhythm Fasting sells 3 one-off in-app purchases. FastJoy asks for nothing beyond the download.

Scorecard4 real differences ยท 2 level
Rhythm Fasting versus FastJoy: the parameters behind the verdict, then further details
ParameterRhythm FastingFastJoy
Price$9.99Free โ€” better
Update frequencyEvery 3 daysโ€”
AdsNo โ€” betterYes
In-app purchasesYesNo โ€” better
DevicesiPhone, iPadiPhone, iPad, iPod โ€” better
Requires iOS17.613.0 โ€” better
Further details โ€” not scored
Size36 MB41 MB
Age rating4+12+
DeveloperPiyush AhujaFerran Espuna

In-app purchases

3 purchases

Rhythm Fasting

One-time3
  • Small Tip$0.99
  • Helping developer$4.99
  • Amazing Tip$9.99
None

FastJoy

No in-app purchases

Questions

Is Rhythm Fasting free?
Rhythm Fasting costs $9.99, and also offers in-app purchases.
Is FastJoy free?
FastJoy is free to download, with no in-app purchases.
Do Rhythm Fasting or FastJoy have ads?
FastJoy shows ads; Rhythm Fasting does not.

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