Comparison

Fast.io vs SimpleFast

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

Head to head
About

Fast.io

Features
Read full description

Fast.io is a beautifully simple intermittent fasting timer designed to help you stay consistent and focused on your fasting goals. Track your fast in real time, monitor hydration, and stay motivated with clear insights, widgets, and Live Activities. Perfect for popular fasting schedules like **16:8, 18:6, or OMAD**. #### TRACK YOUR FAST β€’ Start fasting sessions with presets like 16:8, 18:6, or create custom fasting intervals β€’ See elapsed time, remaining time, and fasting phases\ β€’ Follow your fasting progress in real time #### TRACK YOUR WEIGHT β€’ Sync weight with Apple Health β€’ Monitor weight changes during fasting β€’ Understand how fasting affects your body #### STAY CONSISTENT β€’ Local reminders for fasting milestones β€’ Daily hydration tracking β€’ Motivation through achievements and streaks #### SEE YOUR PROGRESS β€’ History with notes and mood tracking β€’ Weekly, monthly, and yearly statistics β€’ Understand and improve your fasting habits #### BUILT FOR APPLE DEVICES β€’ Live Activities and Dynamic Island β€’ Home Screen and Lock Screen widgets β€’ Apple Watch companion app #### PRO FEATURES β€’ One‑time purchase (no subscription) β€’ Advanced customization β€’ Extended fasting history Fast.io is designed to make intermittent fasting simple, beautiful, and effective.

About

SimpleFast

Features
Read full description

SimpleFast: Fasting Tracker A clean and simple way to track your fasting windows, eating windows, and daily habits - all in one place. SimpleFast is designed to help you stay consistent without distractions. Whether you’re just starting or following a structured plan like 16:8, it keeps everything clear, calm, and easy to use. - 100% Free. No ads. No distractions. SimpleFast is completely free to use, with no ads and no subscriptions. Focus on your fasting routine without interruptions. - Track your fast, effortlessly Start a fasting session with one tap and let SimpleFast handle the rest - even when the app is closed. Choose from popular fasting styles: * 16:8 Intermittent Fasting * Overnight Fasting * Alternate Day Fasting * Custom durations - Flexible eating windows After your fast, start an eating window and adjust it to match your real schedule. * Set custom start time * Adjust window length * Track fasting and eating cycles - See your progress * Daily streak tracking * Total fasting time * Longest fast * Weekly overview - Reflect and stay consistent * Mood tracking * Hunger level * Notes after each fast - Helpful reminders * Fast complete alerts * Eating window reminders * Window ending alerts - Private by design Your data stays on your device. No account required. No tracking. - Disclaimer SimpleFast is a fasting tracker for personal use. It does not provide medical advice.

Screenshots

Fast.io4 screens
SimpleFast4 screens

Verdict

The call

The clearest difference is in-app purchases: SimpleFast at none against Fast.io's 1. On price, ads, device support and iOS requirement 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. Fast.io sells 1 one-off in-app purchase. SimpleFast asks for nothing beyond the download.

Scorecard1 real difference Β· 5 level
Fast.io versus SimpleFast: the parameters behind the verdict, then further details
ParameterFast.ioSimpleFast
PriceFreeFree
Update frequencyMonthlyβ€”
AdsNoNo
In-app purchasesYesNo β€” better
DevicesiPhone, Apple WatchiPhone, iPad
Requires iOS26.0 β€” better26.2
Further details β€” not scored
Size23 MB6 MB
Age rating4+4+
DeveloperStefan SturmKhitdhikhun Klinsang

In-app purchases

1 purchases

Fast.io

One-time1
  • Fast.io Pro$6.99
None

SimpleFast

No in-app purchases

Questions

Is Fast.io free?
Fast.io is free to download, with in-app purchases available.
Is SimpleFast free?
SimpleFast is free to download, with no in-app purchases.
Do Fast.io or SimpleFast have ads?
Neither Fast.io nor SimpleFast shows ads.

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