Comparison

Meridian vs Vow Fasting

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

Vow Fasting

Read full description

Vow is a refined intermittent fasting tracker built for calm daily discipline. Start a fast, follow your progress, and understand each stage as your body moves through metabolic phases like digesting, fat burning, ketosis, and autophagy. Vow keeps fasting focused with a precise timer, clear progress, thoughtful reminders, and a minimal dark design made for daily practice. Whether you follow 16:8, 18:6, 20:4, 24-hour fasts, or custom fasting goals, Vow helps you track every session with clarity. FEATURES • Elegant fasting timer with real-time progress • Intermittent fasting plans including 16:8, 18:6, 20:4, and 24h • Metabolic phase tracking from digesting to fat burning, ketosis, and autophagy • Fasting history, streaks, and weekly insights • Custom and extended fasting durations • Goal reminders and phase update notifications • Minimal dark interface with premium themes • Home Screen widgets and Live Activity support Vow Pro Unlock extended fasting protocols, custom durations, premium themes, advanced insights, and premium widgets. Vow is not medical advice. If you have a medical condition, are pregnant, under 18, or have a history of eating disorders, consult a healthcare professional before fasting. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://vowfasting.com/privacy

Screenshots

Meridian4 screens
Vow Fasting4 screens

Verdict

The call

Meridian and Vow Fasting are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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 Vow Fasting sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

ScorecardNo meaningful differences
Meridian versus Vow Fasting: the parameters behind the verdict, then further details
ParameterMeridianVow Fasting
PriceFreeFree
Rating5.0 (1 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings1 — better—
Update frequency—Fortnightly
AdsNoNo
In-app purchasesYesYes
MonetizationFreemium—
DevicesiPhone, iPad — betteriPhone
Requires iOS17.617.6
Further details — not scored
Size3 MB13 MB
Age rating12+4+
DeveloperZACHARY MARK MULLIGANFILIP LUCCA KEJSER DAMICI

In-app purchases

3 purchases

Meridian

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

Vow Fasting

Subscriptions2
  • Vow Pro Monthly$4.991 Month
  • Vow Pro Annual$39.991 Year

Questions

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

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