Comparison

FastFlow vs Fastwell

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 is a lightweight fasting tracker and fasting timer for intermittent fasting plans like 16:8, 18:6, 20:4, and OMAD. It helps you start more easily, stay consistent, and better understand your own rhythm over time. With FastFlow, you can: - choose a common fasting plan or create your own custom schedule - start a fast in one tap and clearly track your duration and goal progress - receive start reminders, phase reminders, and goal reminders - keep a complete fasting history with add, edit, and delete support - review stats and weekly reports, including completions, streaks, and time trends - log weight alongside your fasting rhythm for longer-term reflection - generate share cards for completed fasts and weekly reports FastFlow is not a calorie-counting platform or a heavy social app. It is a calmer, lighter, and more reliable companion for building a fasting rhythm you can actually keep. Important: intermittent fasting is not suitable for everyone. If you are pregnant, breastfeeding, or have a medical condition or blood sugar concern, please consult a qualified healthcare professional first. Privacy Policy: https://fasting-nu.vercel.app/privacy Terms of Use: https://www.apple.com/legal/macapps/stdeula/

About

Fastwell

Features
Read full description

Fastwell is an honest intermittent fasting timer that shows you what's actually happening inside your body — right on your Lock Screen and Dynamic Island. Start a fast, and Fastwell tracks your journey through the real metabolic stages: glycogen depletion, fat burning, ketosis, and autophagy. No guessing, no gimmicks — just a clear, science-based timeline of where you are and what comes next. The core is free forever. No fake trials, no surprise charges, no locking your own timer behind a paywall. WHY FASTWELL • Fasting stages on Live Activity & Dynamic Island — glance at your phone and instantly see if you've hit fat burning or ketosis, without opening the app. • A timer you can actually trust — start, pause, edit your start time, and finish honestly. • Popular windows built in — 16:8, 18:6, 20:4, OMAD, or set your own custom window (12–36h). • Streaks & progress — build momentum with streaks, best-streak tracking, weekly stats, and trend charts. • Weight & BMI tracking — log your weight, see trends, and sync with Apple Health. • Home Screen & Lock Screen widgets — your current stage and countdown, always visible. • Smart reminders — get notified when your fast completes or your eating window is about to close, with quiet hours respected. • Learn the science — clear, no-hype articles on fasting basics, metabolic stages, weight, and longevity. HONEST BY DESIGN Your timer, windows (16:8/18:6), history, streaks, and Live Activity are free — forever. Fastwell Premium unlocks deeper insights, locked custom windows, and expert stage breakdowns, but the essentials never disappear. Fastwell Premium (optional) • Weekly and Yearly plans available. • The Yearly plan includes a 7-day free trial. • Payment is charged to your Apple ID account at confirmation of purchase. • Subscriptions renew automatically unless auto-renew is turned off at least 24 hours before the end of the current period. • Manage or cancel anytime in your App Store account settings. • Any unused portion of a free trial is forfeited when you purchase a subscription. Fastwell is a wellness and educational tool. It is not medical advice and is not intended to diagnose, treat, cure, or prevent any disease. Consult your doctor before starting any fasting program, especially if you are pregnant, nursing, taking medication, or have a medical condition. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

FastFlow4 screens
Fastwell4 screens

Verdict

The call

The clearest difference is ads: Fastwell at none against FastFlow's shown. Fastwell also leads on device support (3 vs 1). FastFlow's advantage is update cadence (every 5 days vs monthly). On price, in-app purchases and iOS requirement there is nothing between them.

Scored on Price Ā· Rating Ā· Positive reviews Ā· Number of ratings Ā· Update frequency Ā· Ads Ā· In-app purchases Ā· Monetization Ā· Best chart rank Ā· Devices Ā· Requires iOS

CostPrice Ā· In-app purchases Ā· Ads Ā· Monetization

Both are free to download. FastFlow sells 2 in-app purchases, starting at $0.99 per month and Fastwell sells 2 in-app purchases, starting at $4.99 per 7 days. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

FastFlow ships an update every 5 days, Fastwell monthly. The most recent releases landed on June 4, 2026 and September 9, 2026 respectively.

Scorecard3 real differences Ā· 3 level
FastFlow versus Fastwell: the parameters behind the verdict, then further details
ParameterFastFlowFastwell
PriceFreeFree
Update frequencyEvery 5 days — betterMonthly
AdsYesNo — better
In-app purchasesYesYes
DevicesiPhoneiPhone, iPad, Apple Watch — better
Requires iOS17.017.0
Further details — not scored
Size11 MB16 MB
Age rating4+4+
Developer굩铭 锾Vadim Semenko

In-app purchases

2 purchases

FastFlow

Subscriptions2
  • FastFlow Pro Monthly$0.991 Month
  • FastFlow Pro Yearly$9.991 Year
2 purchases

Fastwell

Subscriptions2
  • Weekly$4.997 Days
  • Yearly7 Days trial$19.991 Year

Questions

Is FastFlow free?
FastFlow is free to download, with in-app purchases available.
Is Fastwell free?
Fastwell is free to download, with in-app purchases available.
Do FastFlow or Fastwell have ads?
FastFlow shows ads; Fastwell does not.
Which is updated more often, FastFlow or Fastwell?
FastFlow ships an update every 5 days, and Fastwell monthly. Most recently, FastFlow was updated on June 4, 2026 and Fastwell on September 9, 2026.

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