Comparison

FastFlow vs Metabo

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

Head to head
About

FastFlow

Features
Read full description

FastFlow helps you build a consistent intermittent fasting routine with a clean timer, simple plans, and quick daily check-ins. Whether you’re doing 16:8, 14:10, 18:6, 20:4, or a custom schedule, FastFlow keeps your day clear: start a fast in one tap, see exactly when your eating window begins, and track how you feel so you can learn what works. What you can do with FastFlow - Fasting timer (one tap) - Start, end, or break a fast anytime - Countdown + progress at a glance -Clear labels for fasting vs eating time Plans & schedule - Choose a plan: 14:10, 16:8, 18:6, 20:4, or Custom - Set your eating start time and we calculate the rest - Adjust anytime—your routine should fit your life Gentle reminders - Notifications for Start fast, End fast, and Hydration - Reminders are optional and can be changed anytime in Settings Daily logs (fast check-in) - Track mood, energy, hunger - Optional weight and notes Insights & trends - Weekly/monthly performance and completion - Wellbeing averages from your logged days Subscription Details: If you choose to purchase FastFlow Premium, payment will be charged to your Apple ID account at confirmation of purchase. Subscriptions auto-renew unless canceled at least 24 hours before the end of the current period. Your account will be charged for renewal within 24 hours prior to the end of the current period. Privacy Policy: https://sites.google.com/view/fastflow-app/privacy Terms of Service: https://sites.google.com/view/fastflow-app/terms-of-use

About

Metabo

Features
Read full description

Metabo is a simple, private intermittent fasting timer. Start a fast with one tap and see which stage your body is likely in as the hours pass — Fed, Fat burning, Ketosis, Autophagy — then keep your streak going day after day. FREE — YOUR FIRST 3 FASTS • Live 16:8 fasting timer with metabolic stage tracking • Day streak, weekly chart and recent fasts • Learn hub based on official public-health sources (NIH) • Home & Lock Screen widgets, Live Activity and a full Apple Watch app • Private by design: your data syncs with your own iCloud — no ads, no trackers METABO PREMIUM (auto-renewing subscription) • Unlimited fasts • Every fasting plan: 14:10, 18:6 and 20:4 • Unlimited fasting history • Detailed insights & weekly trends • Apple Health weight sync Choose yearly, monthly, 3-month or weekly. Payment is charged to your Apple Account at confirmation of purchase; the subscription renews automatically unless cancelled at least 24 hours before the end of the current period. Manage or cancel anytime in your App Store settings. IN YOUR LANGUAGE English, Deutsch, Español, Français, Italiano, Português (BR), Türkçe, Русский, 日本語, 한국어, 简体中文. IMPORTANT Metabo is a wellness tool, not medical advice, and not a medical device. Intermittent fasting is not suitable for everyone — consult a qualified clinician before fasting, especially if you are pregnant, under 18, diabetic, or taking medication. Terms of Use (EULA): https://metabo.webkodingtheme.com/terms.html Privacy Policy: https://metabo.webkodingtheme.com/privacy.html Support: support@webkoding.com

Screenshots

FastFlow4 screens
Metabo4 screens

Verdict

The call

The clearest difference is iOS requirement: FastFlow at 15.1 against Metabo's 17.0. On price, update cadence, ads and in-app purchases 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. FastFlow sells 2 in-app purchases, starting at $2.99 per month and Metabo sells 4 in-app purchases, starting at $5.99 per 7 days. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

FastFlow ships an update every 2 days, Metabo every 3 days. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

Scorecard1 real difference · 5 level
FastFlow versus Metabo: the parameters behind the verdict, then further details
ParameterFastFlowMetabo
PriceFreeFree
Update frequencyEvery 2 days — betterEvery 3 days
AdsNoNo
In-app purchasesYesYes
DevicesiPhone, iPodiPhone, iPad, Apple Watch — better
Requires iOS15.1 — better17.0
Further details — not scored
Size35 MB14 MB
Age rating4+4+
DeveloperUprise iX LLCArif OZELCI

In-app purchases

2 purchases

FastFlow

Subscriptions2
  • Monthly Subscription$2.991 Month
  • Weekly Subscription$8.997 Days
4 purchases

Metabo

Subscriptions4
  • Premium Weekly$5.997 Days
  • Premium Monthly$7.991 Month
  • Premium 3 Months$19.993 Months
Show 1 more
  • Premium Yearly$49.991 Year

Questions

Is FastFlow free?
FastFlow is free to download, with in-app purchases available.
Is Metabo free?
Metabo is free to download, with in-app purchases available.
Do FastFlow or Metabo have ads?
Neither FastFlow nor Metabo shows ads.
Which is updated more often, FastFlow or Metabo?
FastFlow ships an update every 2 days, and Metabo every 3 days. Most recently, FastFlow was updated on October 25, 2026 and Metabo on October 24, 2026.

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