Comparison

Repbook Iron plan vs FastOnce

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

Head to head
About

Repbook Iron plan

Features
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Repbook Iron plan is a focused workout tracker for lifters who want fast logging and clear progress without account setup or noisy coaching. Build routines on iPhone, log workouts from your phone or Apple Watch, and review progress after each session. Repbook keeps recommendations conservative and practical by using your routine targets and recent workout history. No subscriptions. Pay once get it all. No AI All data is stored on device nothing goes to third party servers.

About

FastOnce

Features
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One giant button. That is the whole app. Tap it to start a fast, tap it to end. A real 24-hour clock face shows exactly where your fast sits in the day, not an abstract bar. Available in English, Spanish, French, Arabic, Russian, Hindi and Ukrainian. RAMADAN Switch on Ramadan mode and the timer stops being a number of hours you picked. Your fast runs from suhoor to iftar, worked out on the phone for wherever you are, and both times move a few minutes every day exactly as they really do. Six calculation methods: Umm al-Qura, Dubai, the Egyptian General Authority, the Muslim World League, Karachi and North America. The one used where you are is chosen for you. Everything is computed on the device from your location, so it works with no signal at all and nothing is sent anywhere. Ramadan mode appears in the app as the month comes round. WHY FASTONCE Nearly every fasting app rents you a timer. You answer a quiz, hand over an email, then pay monthly for a clock. FastOnce asks for none of that. No account, no sign-up, and it opens straight onto the button. WHAT YOU GET, FREE A dial that actually reads as time The ring wraps a 24-hour wall clock, so you can see at a glance that your fast ends at 8pm rather than decoding a percentage. Plans that fit your day 12:12, 14:10, 16:8, 18:6, 20:4 and OMAD, or set your own hours. You can also pick the time you want to finish and the length is worked out for you. It keeps going by itself When your fast ends the eating window opens, and when that closes the next fast begins. Weeks can pass without opening the app. Forgot to hit start Backdate the start time and the ring, the stages and every reminder recalculate instantly. Stages, explained in plain language Blood sugar drop, fat burning, ketosis and autophagy, each with a short friendly explanation. No clinical claims, no scare tactics. Your calendar, your streaks, your totals A month calendar of completed fasts, current and longest streaks, and your totals. Free, and staying free. Gentle nudges, only if you want them Optional pings at the halfway mark, at each stage, when your fast completes, and short encouragement while you are in it. Quiet overnight. Your fast, outside the app The running fast lives on the Lock Screen and in the Dynamic Island, counting down without the app open, and it stands up in StandBy while the phone charges. There are Lock Screen widgets, a home-screen widget in three sizes, a Control Center switch, and "start my fast" for Siri. Made for iPad The dial takes the full screen and the four destinations move into a sidebar, so the whole app is one tap deep. FASTONCE PRO, ONE PAYMENT Pro is a single purchase. No subscription, nothing renews. It adds three things and nothing else: Charts and trends Hours per day, how often you reach your goal, your weekly average, and the hour you actually start. Export your log Every fast you have finished, as a spreadsheet file that leaves the app and is yours to keep. Still no account, still offline Pro changes what you can see, not where it lives. PRIVACY No account, no analytics, no advertising, no server of ours. Nothing you record ever leaves your iPhone, and neither does your location. The only time FastOnce talks to anything is when you buy Pro, which goes through the App Store. FastOnce shares general wellbeing information, not medical advice. Talk to a doctor before changing your eating habits.

Screenshots

Repbook Iron plan4 screens
FastOnce4 screens

Verdict

The call

The clearest difference is update cadence: FastOnce at every 5 days against Repbook Iron plan's every 3 months. On price, ads, in-app purchases and device support 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Repbook Iron plan ships an update every 3 months, FastOnce every 5 days. The most recent releases landed on September 12, 2026 and September 28, 2026 respectively.

Scorecard1 real difference · 5 level
Repbook Iron plan versus FastOnce: the parameters behind the verdict, then further details
ParameterRepbook Iron planFastOnce
PriceFreeFree
Update frequencyEvery 3 monthsEvery 5 days — better
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, Apple WatchiPhone, iPad
Requires iOS17.017.0
Further details — not scored
Size9 MB8 MB
Age rating4+4+
DeveloperAndreas EngebretsenAndrii Zakharov

In-app purchases

None

Repbook Iron plan

No in-app purchases

None

FastOnce

No in-app purchases

Questions

Is Repbook Iron plan free?
Repbook Iron plan is free to download, with no in-app purchases.
Is FastOnce free?
FastOnce is free to download, with no in-app purchases.
Do Repbook Iron plan or FastOnce have ads?
Neither Repbook Iron plan nor FastOnce shows ads.
Which is updated more often, Repbook Iron plan or FastOnce?
Repbook Iron plan ships an update every 3 months, and FastOnce every 5 days. Most recently, Repbook Iron plan was updated on September 12, 2026 and FastOnce on September 28, 2026.

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