Comparison

Simple Fast vs FastJoy

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

Head to head
About

Simple Fast

Features
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Take control of your intermittent fasting journey with Simple Fast – Fasting Tracker. Whether you follow 16:8, 18:6, 20:4, or 12:12 fasting plans, Simple Fast gives you everything you need to stay on track – without complicated setup or unnecessary features. FASTING TIMER Start and stop your daily fasting session with one tap. A clear countdown shows exactly how much time remains, while the elapsed timer shows your progress. Know at a glance whether you are in a fasting window or an eating window. HISTORY Review every session at a glance. Each entry shows start time, end time, total duration, and completion status. Check your current streak and average fasting time – all in one place. Filter sessions by day to find exactly what you need. STATISTICS & INSIGHTS Visualize your fasting hours per day, completed days, and streaks with easy-to-read charts. Track your current streak and longest streak to stay motivated. Switch between chart types to explore your data the way you prefer. WEIGHT LOG Log your weight in kilograms or pounds. View a trend chart to see how your weight changes over time, and scroll through your full weight history. Quick-add today's weight right from your profile. BMI TRACKER Set your height and let Simple Fast calculate your body mass index automatically from your logged weight. A visual semi-circular gauge shows exactly where your BMI falls across four ranges – Underweight, Normal, Overweight, and Obese – with a color-coded legend and category label. Track how your BMI shifts over time as you log new weights. PERSONALIZED SETTINGS Choose your preferred fasting plan and adjust it anytime. Enter your height in centimeters or feet and inches so your BMI stays accurate. Toggle reminders so you never miss a fasting window. Switch between metric and imperial units for weight and height display. SMART COMPLETION LOGIC At the end of each session, Simple Fast asks whether you completed your fast. The app automatically compares your actual fasting time against your plan and marks the session accordingly – keeping your streaks accurate and honest. REMINDERS Enable push notifications to receive timely reminders when your fasting window begins or ends. Stay consistent without having to watch the clock. HOME SCREEN WIDGET Add the Simple Fast widget to your home screen for instant visibility into your fasting progress. See at a glance whether you are fasting, how much time remains, and your current streak β€” all without opening the app. Tap the widget to jump straight into the timer. PRIVACY FIRST Simple Fast does not collect personal health data. It tracks fasting time only. All data stays on your device. Review the privacy policy and disclaimer at any time from Settings. WHY SIMPLE FAST? β€’ No account required – start tracking immediately β€’ Clean, distraction-free interface β€’ One session per day – simple and focused β€’ BMI tracking with visual gauge built in β€’ Weight trend charts to monitor progress β€’ Home screen widget for at-a-glance fasting status β€’ Works completely offline β€’ Free to use Download Simple Fast – Fasting Tracker today and build the fasting habit that sticks. Disclaimer: This app does not provide medical advice. Please consult a qualified healthcare professional before starting any fasting routine. The app creators are not responsible for any health issues that may occur. Users should seek proper medical guidance before practicing fasting.

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 β€” 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 β€” 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 β€” 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

Simple Fast4 screens
FastJoy4 screens

Verdict

The call

The clearest difference is iOS requirement: FastJoy at 13.0 against Simple Fast's 15.0. On price, ads, in-app purchases and device support there is nothing between them.

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

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Scorecard1 real difference Β· 5 level
Simple Fast versus FastJoy: the parameters behind the verdict, then further details
ParameterSimple FastFastJoy
PriceFreeFree
Update frequencyEvery 2 monthsβ€”
AdsYesYes
In-app purchasesNoNo
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.013.0 β€” better
Further details β€” not scored
Size45 MB41 MB
Age rating17+12+
DeveloperDuc Dang NgocFerran Espuna

In-app purchases

None

Simple Fast

No in-app purchases

None

FastJoy

No in-app purchases

Questions

Is Simple Fast free?
Simple Fast is free to download, with no in-app purchases.
Is FastJoy free?
FastJoy is free to download, with no in-app purchases.
Do Simple Fast or FastJoy have ads?
Both Simple Fast and FastJoy show ads.

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