Comparison

FastZen vs TimeFast

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

Head to head
About

FastZen

This app helps you manage your intermittent fasting journey with custom schedules, progress tracking, and smart reminders. Achieve your weight loss and energy goals with a clean, intuitive interface and motivational features.

Highlights
  • Custom fasting schedules (16:8, 20:4, OMAD, up to 168 hours)
  • Progress tracking with history, streaks, and insights
  • Smart reminders for fasting start and end times
  • Achievements and milestones for motivation
  • Calendar view of completed fasts
  • Light and dark mode
  • Widgets
Read full description

Fasting made simple — and actually enjoyable. FastZen is a beautifully designed intermittent fasting tracker that helps you reach your goals with 16:8, 18:6, 20:4, OMAD and extended fasts. Whether you want to lose weight, build healthier habits or simply feel better, FastZen keeps you motivated from your first hour to your finish line. WHY YOU'LL LOVE FASTZEN • EFFORTLESS TRACKING — Start any fast in one tap. A live countdown and a smooth progress ring show exactly where you are. • LOCK SCREEN & DYNAMIC ISLAND — Follow your fast at a glance with Live Activities, without even opening the app. • APPLE HEALTH SYNC — Fasting sessions and your weight are saved to Apple Health automatically. • BODY TRACKING — Log your weight and water intake and watch your progress trend over time. • 16 PROTOCOLS + CUSTOM PLANS — From beginner-friendly 12:12 and 16:8 to 24, 48 and 72-hour fasts — or create your own schedule. • SMART REMINDERS — Get notified when your eating window opens and closes, and never miss the end of a fast. • CHALLENGES & STREAKS — Stay consistent with weekly challenges and keep your streak alive. • PROGRESS YOU CAN SEE — Weekly charts, a calendar heatmap and clear stats show how far you've come. • PRIVACY FIRST — Your fast is hidden when you switch apps, and you can export your data anytime. HOW IT WORKS 1. Answer a few quick questions so we can tailor a plan to your goals. 2. Pick your protocol — 16:8, 20:4, OMAD or fully custom. 3. Start your first fast and let FastZen handle the rest. FASTZEN PREMIUM FastZen is a subscription app. Every plan begins with a 7-day free trial, and you can cancel anytime in your App Store account settings before the trial ends. Your fasts, history and progress stay saved across all your devices via iCloud. Terms of Use: https://sites.google.com/view/mefjudevllc/terms-conditions Privacy Policy: https://sites.google.com/view/mefjudevllc/privacy-policy

About

TimeFast

Features
Read full description

TimeFast is the intermittent fasting timer that respects your privacy. Start your fast with one tap, watch a beautiful progress ring track every minute, and see exactly which fasting phase you're in. No account needed, no subscription, no data ever leaves your device. Whether you follow 16:8, OMAD, or your own schedule — TimeFast adapts to you, not the other way around. FASTING PROTOCOLS FOR EVERY GOAL - 6 proven protocols: 12:12, 14:10, 16:8, 18:6, 20:4, and OMAD (23:1) - Create custom fasting plans with any duration from 1 to 72 hours - Difficulty indicators from beginner to expert to help you progress REAL-TIME FASTING TRACKER - Animated progress ring showing elapsed and remaining time - Live countdown timer with hours, minutes, and optional seconds - Fasting phase timeline shows your body's stages: fat burning (12h), ketosis (16h), autophagy (24h) - Percentage-based progress at a glance - Forgot to start? Adjust your start time retroactively FASTING JOURNAL & SESSION DETAILS - Detailed breakdown for every completed fast - See which metabolic phases you reached - Add personal notes and reflections to any session - Track your achieved percentage and duration STREAKS, HISTORY & STATISTICS - Daily streak counter to build your fasting habit - Full session history with interactive calendar view - Success rate, average fasting duration, and total hours tracked - Visual streak badge to keep your motivation high HOME SCREEN & LOCK SCREEN WIDGETS - Small and medium Home Screen widgets for at-a-glance status - Circular and rectangular Lock Screen widgets for quick checks - Live progress updates while fasting - Streak display when you're in your eating window SMART REMINDERS - Get notified when your fast is complete — even while the app is open - Set a daily reminder to start your fast at the time that works for you DESIGNED WITH LIQUID GLASS - Built natively for iOS 26 with Apple's Liquid Glass design - Refined dark-mode interface with translucent glass surfaces - No account required — works immediately out of the box - One-time purchase — no subscription, yours forever PRIVACY BY DESIGN TimeFast stores all data exclusively on your device. No data is collected, transmitted, or shared with anyone. Zero analytics, zero third-party SDKs, zero server connections. Your fasting data belongs to you alone. Available in English and German. All interface elements adapt to your system language.

Screenshots

FastZen3 screens
TimeFast4 screens

Verdict

The call

The clearest difference is price: FastZen at Free against TimeFast's $6.99. TimeFast's advantage is in-app purchases (none vs 5) and update cadence (daily vs every 5 days). On ads, device support and iOS requirement 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

CostPrice · In-app purchases · Ads · Monetization

FastZen is free to download; TimeFast costs $6.99 up front. FastZen sells 5 in-app purchases, starting at $1.99 per 7 days. TimeFast asks for nothing beyond the download.

UpkeepUpdate frequency

FastZen ships an update every 5 days, TimeFast daily. The most recent releases landed on September 23, 2026 and October 15, 2026 respectively.

Scorecard3 real differences · 6 level
FastZen versus TimeFast: the parameters behind the verdict, then further details
ParameterFastZenTimeFast
PriceFree — better$6.99
Rating5.0 (9 ratings) — better—
Number of ratings9 — better—
Update frequencyEvery 5 daysDaily — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFreemium—
DevicesiPhoneiPhone
Requires iOS26.0 — better26.2
Further details — not scored
Size27 MB1 MB
Age rating4+17+
DeveloperMefjuDev LLCKilowatt Media

In-app purchases

5 purchases

FastZen

Subscriptions4
  • Weekly3 Days trial$1.997 Days
  • Monthly$2.991 Month
  • 3 Months$7.993 Months
Show 1 more
  • Yearly$19.991 Year
One-time1
  • Lifetime$39.99
None

TimeFast

No in-app purchases

Questions

Is FastZen free?
FastZen is free to download, with in-app purchases available.
Is TimeFast free?
TimeFast costs $6.99, with no in-app purchases.
Do FastZen or TimeFast have ads?
Neither FastZen nor TimeFast shows ads.
Which is updated more often, FastZen or TimeFast?
FastZen ships an update every 5 days, and TimeFast daily. Most recently, FastZen was updated on September 23, 2026 and TimeFast on October 15, 2026.

Other comparisons