Comparison

Fasting Mastery vs FastFlow

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

Head to head
About

Fasting Mastery

Features
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You fasted for 14 hours yesterday. You just don't know it yet. Fasting Tracker shows you exactly where you are in your fast โ€” right now, in real time. No meal plans. No food databases. No judgment. Just the clock, the phase you're in, and a little nudge to keep going. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://lavender-utahraptor-b7c.notion.site/Privacy-policy-2f68fbc25c0f80b293d0fba19d8ba7a5 YOUR FAST, LIVE - See your fasting duration tick up every second โ€” Fat Burning, Autophagy, whatever phase you're chasing - Log your last meal in 3 taps. Seriously. Three. - Quick presets: Now, 15m ago, 1h ago โ€” because nobody wants to type the exact time they ate a biscuit STAY HYDRATED, STAY FASTING - Log every sip with quick presets and your own custom "My cup" size - Live hydration score shows how you're doing over the last 24 hours โ€” full tank means you nailed it - A dedicated water page: today's intake, weekly bars, hourly patterns, and a confidence range that sharpens as you log - Water never breaks your fast โ€” it has zero calories, so the clock keeps running while you stay topped up DATA THAT ACTUALLY TELLS YOU SOMETHING - 24-hour timeline cards: see your fasting vs eating windows painted across every day of the week - Phase stacked bar chart: find out which fasting phase you're actually spending time in - Insights screen: your streak, your personal best, your eating window, your program match โ€” all in one scroll - Calorie breakdown by meal type with your personal BMR as a reference line (optional body profile) - Filter your history by Water, Food, or Alcohol with a single tap YES, ALCOHOL LOGGING TOO - Log drinks from 11 types: Lager, Red Wine, Spirits, Cocktails and more - Automatic calorie calculation from ABV and serving size - Real-time Blood Alcohol Level estimate with dissolution curve, drink-event markers, and predicted sober time - It participates in your fasting clock, because biology doesn't take the night off BUILD STREAKS THAT ACTUALLY STICK - Auto-detected fasting patterns (16:8, 18:6, 20:4 and more) - Week-over-week trend arrows โ€” is your fast getting longer or slipping? - Personal best tracker โ€” your longest fast, sitting there daring you to beat it - Fasting program comparison: see how close you actually are to your goal - YOUR DATA, EVERYWHERE - Works 100% offline โ€” no account needed to start - Optional cloud sync via Google Sign-In โ€” your history (water included) follows you across devices - Cloud backup and restore โ€” nothing gets lost No guilt. No streaks of shame. No diet culture. Just your data, honestly. And a very satisfying timer going up. Download free. Start your fast.

About

FastFlow

Features
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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/

Screenshots

Fasting Mastery4 screens
FastFlow4 screens

Verdict

The call

The clearest difference is ads: Fasting Mastery at none against FastFlow's shown. Fasting Mastery also leads on device support (3 vs 1) and iOS requirement (13.0 vs 17.0). On price, update cadence and in-app purchases there is nothing between them.

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

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Fasting Mastery sells 3 in-app purchases, starting at $1.99 per month and FastFlow sells 2 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Fasting Mastery ships an update every 4 days, FastFlow every 5 days. The most recent releases landed on September 11, 2026 and September 16, 2026 respectively.

Scorecard3 real differences ยท 3 level
Fasting Mastery versus FastFlow: the parameters behind the verdict, then further details
ParameterFasting MasteryFastFlow
PriceFreeFree
Update frequencyEvery 4 days โ€” betterEvery 5 days
AdsNo โ€” betterYes
In-app purchasesYesYes
DevicesiPhone, iPad, iPod โ€” betteriPhone
Requires iOS13.0 โ€” better17.0
Further details โ€” not scored
Size73 MB11 MB
Age rating12+4+
DeveloperYasiru Abeygunawardanaๆตฉ้“ญ ้กพ

In-app purchases

3 purchases

Fasting Mastery

Subscriptions3
  • Monthly$1.991 Month
  • Quarterly$2.993 Months
  • Annual$9.991 Year
2 purchases

FastFlow

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

Questions

Is Fasting Mastery free?
Fasting Mastery is free to download, with in-app purchases available.
Is FastFlow free?
FastFlow is free to download, with in-app purchases available.
Do Fasting Mastery or FastFlow have ads?
FastFlow shows ads; Fasting Mastery does not.
Which is updated more often, Fasting Mastery or FastFlow?
Fasting Mastery ships an update every 4 days, and FastFlow every 5 days. Most recently, Fasting Mastery was updated on September 11, 2026 and FastFlow on September 16, 2026.

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