Comparison

Meridian vs FastWindow

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

Head to head
About

Meridian

This app offers a straightforward approach to intermittent fasting, focusing on a clean interface and scientific insights into metabolic phases. It allows users to start and stop fasting with ease, track custom schedules, and understand their body's processes without intrusive features or upselling.

Highlights
  • One-tap start/stop timer
  • Metabolic phase insights
  • Built-in and custom schedules
  • Data stays on device
  • Optional Apple Health integration
  • Clean, intentional design
Features
Read full description

Meridian is the fasting app for people who are tired of fasting apps. No 15-screen onboarding quiz. No AI coach upselling you a meal plan. No gamification badges. No paywall on the timer. Just a clean, powerful tool that respects your intelligence and your time. START IN SECONDS One tap to start. One tap to stop. Meridian tracks your fasting window, shows what's happening in your body at each metabolic phase, and stays out of your way. Every schedule built in — 14:10, 16:8, 18:6, 20:4, OMAD, or set your own custom window. REAL SCIENCE, NOT SLOGANS Each body phase is grounded in peer-reviewed metabolic research. Know when glycogen depletes. Know when ketosis begins. Know when autophagy ramps up. Meridian tells you what's actually happening — with citations, not marketing copy. YOUR DATA STAYS ON YOUR DEVICE No account required. No cloud sync you didn't ask for. No analytics tracking your behavior. All data lives on your iPhone and stays there. Optional Apple Health integration reads and writes only with your explicit permission. DESIGNED WITH INTENTION Every screen earns its place. Meridian follows a less-but-better philosophy — no feature creep, no settings bloat, no dark patterns. Dark mode and light mode. Clean typography. A timer that's beautiful enough to leave on your nightstand. BUILT-IN SCHEDULES • 14:10 — Gentle start for beginners • 16:8 — The most popular protocol • 18:6 — Deeper metabolic benefits • 20:4 — The Warrior approach • OMAD — One Meal A Day • Custom — Set any window you want MERIDIAN PREMIUM Unlock deeper insights and advanced features for less than a coffee: • Detailed fasting history and trends • Body phase insights with metabolic data • Advanced streak tracking • Custom schedule presets • Full data export $1.99/month · $14.99/year (save 37%) · $39.99 lifetime No free trial. No tricks. At this price, you'll know within a day if Meridian is for you. Privacy policy: https://trymeridian.today/privacy-policy Terms Of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Support: https://trymeridian.today/support

About

FastWindow

Features
Read full description

FastWindow does one thing. It shows you how long you've been fasting and when you can eat. Every major fasting app has become a wellness platform — coaching subscriptions, quizzes, recipe feeds, and paywall friction. FastWindow strips all of that away. ONE-TAP FASTING TIMER Open the app. Tap start. Done. No quiz about your goals. No onboarding survey. No account creation. Just a clean fasting timer that works. You see two things: • How long you've been fasting (elapsed time) • When you can eat (remaining time) That's it. That's the app. FASTING PRESETS BUILT IN Choose your fasting window in one tap: • 16:8 (16 hours fasting, 8 hours eating) • 18:6 (18 hours fasting, 6 hours eating) • 20:4 (20 hours fasting, 4 hours eating) • OMAD (One Meal A Day) • Custom durations (Pro feature) No coaching. No meal plans. No calorie tracking. Just fasting. FEATURES THAT MATTER • One-tap fasting timer • Live elapsed and remaining time • Fasting presets (16:8, 18:6, 20:4, OMAD) • 7-day fast history at a glance • Calendar heatmap to see patterns • Backdate your start time if you forget to start the timer • Local notifications when your fast ends • No account required. Ever. • No subscription. Ever. FASTWINDOW PRO — One Time Purchase Upgrade once to unlock: • Unlimited fast history (beyond 7 days) • Custom fasting durations (set any hours:minutes) • Weight log with trend visualization • Apple Health export (weight, fasting data) • Advanced stats (average fast length, streak tracking) Pay once. £4.99. Yours forever. No renewal, no monthly fee, no subscription. WHY FASTWINDOW EXISTS The fasting app category has a problem. Every major app pushes you toward: • Subscription upsells (coaching, premium insights, meal plans) • Onboarding quizzes (goals, weight, activity level, dietary preferences) • Wellness bloat (recipes, articles, community challenges, step tracking) FastWindow rejects all of that. If you need a fasting coach, use Zero. If you want recipes and meal plans, use Fastic. If you want community challenges, use BodyFast. But if you just want to know how long you've been fasting — and that's it — FastWindow is for you. PERFECT FOR • People practicing intermittent fasting (16:8, 18:6, OMAD, etc.) • Users frustrated by fasting app subscriptions • Anyone who wants a timer, not a wellness platform • People who value simplicity over features • Users tired of onboarding quizzes and paywalls WHO FASTWINDOW IS NOT FOR FastWindow does not provide: • Coaching or fasting advice • Meal plans or recipes • Calorie tracking or macros • Community features or challenges • Water intake or step tracking • Body measurements beyond weight If you need those features, consider Zero, Fastic, or BodyFast. FastWindow is intentionally minimal. PRIVACY & SIMPLICITY • No account creation required • No email, no password, no profile • All data stored locally on your device • No cloud sync (intentional — keeps it simple) • No third-party analytics or tracking • Offline-first design NO SUBSCRIPTION MEANS NO SUBSCRIPTION Other fasting apps say "free" but push monthly subscriptions for basic features like custom fasting durations or history beyond 7 days. FastWindow is different: one optional upgrade, one price, lifetime access. No coaching upsells, no premium tiers, no renewal fatigue. Free version: 7-day history, preset durations (16:8, 18:6, 20:4, OMAD), basic timer Pro version: £2.99 once, everything unlocked, forever MEDICAL DISCLAIMER FastWindow is not medical advice. Consult a healthcare professional before beginning any fasting program, especially if you have a medical condition or take medications. SUPPORT & CONTACT Questions? Feedback? Contact us at karl@projectsnaplabs.com FastWindow is independently developed with your focus and simplicity as the top priorities. Download FastWindow today and track your fasts without the bloat, subscriptions, or friction.

Screenshots

Meridian4 screens
FastWindow4 screens

Verdict

The call

The clearest difference is iOS requirement: FastWindow at 15.1 against Meridian's 17.6. On price, ads, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Meridian sells 3 in-app purchases, starting at $1.99 per month and FastWindow sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Scorecard1 real difference · 8 level
Meridian versus FastWindow: the parameters behind the verdict, then further details
ParameterMeridianFastWindow
PriceFreeFree
Rating5.0 (1 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings1 — better—
AdsNoNo
In-app purchasesYesYes
MonetizationFreemium—
DevicesiPhone, iPadiPhone, iPod
Requires iOS17.615.1 — better
Further details — not scored
Size3 MB37 MB
Age rating12+4+
DeveloperZACHARY MARK MULLIGANPROJECTSNAPLABS LTD

In-app purchases

3 purchases

Meridian

Subscriptions2
  • Meridian Premium$1.991 Month
  • Meridian Premium$14.991 Year
One-time1
  • Meridian Premium (Lifetime)$39.99
1 purchases

FastWindow

One-time1
  • FastWindow Pro$4.99

Questions

Is Meridian free?
Meridian is free to download, with in-app purchases available.
Is FastWindow free?
FastWindow is free to download, with in-app purchases available.
Do Meridian or FastWindow have ads?
Neither Meridian nor FastWindow shows ads.

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