Comparison

Vasten vs The Fast

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

Head to head
About

Vasten

Features
Read full description

Vasten does one job well: it keeps an accurate record of your fast. Start in one tap, see elapsed time and your goal on the main screen, and keep the timer visible through a Home Screen widget, Lock Screen Live Activity, and Dynamic Island. Reaching the goal never ends the fast automatically—you decide when it ends. Your history remains useful and under your control. Correct start and end times, review simple totals, import Vasten JSON or Zero history, export everything as JSON or CSV, or delete any record. Features: • One-tap start with an adjustable start time • Custom fasting goals from 1 to 168 hours • Clear widget goal progress and goal end times • Lock Screen and Dynamic Island Live Activity • Small and medium Home Screen widgets • Separate timer and 12-week fasting-activity widgets • Custom accent colors shared across the app and widgets • Editable history and summary statistics • Configurable local goal-time notification • Vasten JSON and Zero fasting-history import • Private device storage with private iCloud synchronization • JSON and CSV export • English and Dutch • No account, ads, analytics, or subscription Stage labels are general educational time ranges. They are not measurements of your body or medical advice.

About

The Fast

Track your fasting periods with a visually engaging timer and home screen widgets. Review your history in a calendar view and share your progress as an image. An account is optional for local use, with cross-device syncing available.

Highlights
  • Customizable fasting timer
  • Home screen widgets
  • Live Activities support
  • Fasting history calendar
  • Shareable progress images
  • Optional account for sync
Features
Read full description

Fasting, at your pace. Choose a duration and start. A slowly moving record marks the time, with elapsed time and time remaining always within reach. ON YOUR HOME SCREEN Small and medium widgets keep your fast in view. Choose elapsed time or time remaining. The larger widget shows both, with the full record and progress. Live Activities keep the timer on your Lock Screen and Dynamic Island on supported iPhones. ON YOUR WRIST Check your timer, choose a duration for this fast, and start or end from Apple Watch. Add a watch-face complication for quick access. Requires The Fast on your paired iPhone. A MONTH, ON RECORD Browse your fasting history in a simple calendar. Finished goals retain their record color. Early endings appear in gray. Open any day to see each fast. YOURS TO SHARE Share one fast or your whole month as a single image. Include record details and exact times when you want to. LIGHT BY DESIGN Use the timer, history and widgets without an account. Your records stay on your device unless you sign in to save them across devices. Optional Apple, Google or email sign-in lets you keep records across devices. Free to use. No ads. The Fast records time. It does not provide medical or dietary advice.

Screenshots

Vasten4 screens
The Fast4 screens

Verdict

The call

The clearest difference is iOS requirement: The Fast at 16.4 against Vasten's 26.5. 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Vasten ships an update every 2 days, The Fast daily. The most recent releases landed on October 31, 2026 and November 10, 2026 respectively.

Scorecard1 real difference · 9 level
Vasten versus The Fast: the parameters behind the verdict, then further details
ParameterVastenThe Fast
PriceFreeFree
Rating—5.0 (5 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—5 — better
Update frequencyEvery 2 daysDaily — better
AdsNoNo
In-app purchasesNoNo
Monetization—Free
DevicesiPhoneiPhone, Apple Watch — better
Requires iOS26.516.4 — better
Further details — not scored
Size2 MB32 MB
Age rating4+4+
DeveloperDennis Van DalenPrime Adventure LLC

In-app purchases

None

Vasten

No in-app purchases

None

The Fast

No in-app purchases

Questions

Is Vasten free?
Vasten is free to download, with no in-app purchases.
Is The Fast free?
The Fast is free to download, with no in-app purchases.
Do Vasten or The Fast have ads?
Neither Vasten nor The Fast shows ads.
Which is updated more often, Vasten or The Fast?
Vasten ships an update every 2 days, and The Fast daily. Most recently, Vasten was updated on October 31, 2026 and The Fast on November 10, 2026.

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