Comparison

Fasting Mastery vs LogBook

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

LogBook

Features
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LogBook is a habit tracker with a diary attached. You tick what you kept, then you write the day down. Months later the streak tells you what you did, and the page tells you why. WHAT IT DOES โ€ข One check-in a day. At a time you choose, LogBook asks. Tick the habits you kept, add a photo, write a line or a paragraph. Two minutes, once. โ€ข A streak you can see. Tally marks, not a number in a badge. Every habit keeps a grid of its own โ€” a month, or a year, at a glance. โ€ข Pages you can reread. Every check-in becomes a dated page in the log. Scroll back through it like a notebook, because that is what it is. โ€ข Habits you build, habits you quit. Track the run you want to start and the scroll you want to stop, side by side. โ€ข A home-screen widget. Your grid, on the home screen, without opening anything. โ€ข Share the day, or don't. Post a day to a small feed of people you trust and react to theirs. Off by default. Nothing is public, and there is no follower count. โ€ข Dark mode that was actually designed. Same paper, dimmed โ€” not an inverted screenshot. โ€ข Works offline. Everything is written on the phone first and synced when there is a signal. Aeroplane, tube, cabin in the woods: the check-in still happens. WHAT IT DOESN'T DO No streaks-as-guilt. No push notifications begging you back. No leaderboard, no points, no streak insurance to buy. Miss a day and the ledger just says so โ€” you can tick it late if you actually did it. THE FREE LOGBOOK Three habits, kept forever, with the full check-in, the full journal, the widget and the feed. No trial timer on the basics. THE FULL LOGBOOK Unlimited habits and every page kept for good. โ€ข $2.99 a month, or $19.99 a year (7 days free on both) โ€ข $29.99 once, if you would rather not subscribe Subscriptions renew until cancelled; manage them in your App Store settings. Cancel any time during the trial and you are not charged. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ WHO IT IS FOR People who have tried a habit app, hit day forty, and found nothing to look back on. LogBook is built so the looking back is the point.

Screenshots

Fasting Mastery4 screens
LogBook4 screens

Verdict

The call

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

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 LogBook sells 3 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

ScorecardNo meaningful differences
Fasting Mastery versus LogBook: the parameters behind the verdict, then further details
ParameterFasting MasteryLogBook
PriceFreeFree
Update frequencyEvery 5 daysโ€”
AdsNoNo
In-app purchasesYesYes
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.0 โ€” better15.1
Further details โ€” not scored
Size45 MB43 MB
Age rating12+4+
DeveloperYasiru AbeygunawardanaGengolia Ltd.

In-app purchases

3 purchases

Fasting Mastery

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

LogBook

Subscriptions2
  • LogBook Pro Monthly7 Days trial$2.991 Month
  • LogBook Pro Yearly7 Days trial$19.991 Year
One-time1
  • LogBook Pro Lifetime$29.99

Questions

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

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