Comparison

FastTime vs RoutineFlow

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

Head to head
About

FastTime

Track your fasting periods and daily weight with a simple timer and calendar. Set custom fasting and eating windows, monitor progress with charts, and log weight changes easily. Personalize your experience with reminders and theme options.

Highlights
  • Simple fasting timer
  • Customizable fasting windows
  • Weight tracking calendar
  • Progress charts and statistics
  • Goal alerts and reminders
  • Light and dark mode
Features
Read full description

Keep fasting simple, and keep your records together. FastTime is a fasting timer and weight tracker for checking your fasting hours, daily weights and progress at your own pace. A timer that's easy to follow Start and end your fast with a tap. See elapsed time, time remaining and your expected finish time. Adjust start and end times or add past fasting records when needed. Daily plans and extended goals Choose a daily plan such as 12:12, 14:10, 16:8, 18:6 or 20:4, or customize your fasting and eating windows. A separate extended fasting plan supports goals from 24 to 72 hours. Fasting records at a glance Review past fasts on a calendar. Weekly charts show fasting durations without tapping, while monthly statistics summarize your time and goal achievements. A calendar for your weight See daily weights directly on the weight calendar. Add or edit past entries, follow your weight graph and compare your latest weight with the previous entry. The full record list stays available below the calendar. Make it fit your routine Use optional goal alerts and start reminders, follow your streak, and choose light or dark mode. Your fasting and weight records are saved on your device. The app includes ads.

About

RoutineFlow

Features
Read full description

RoutineFlow is a personal routine app for running and recording workouts, meals, and daily schedules in one place. Focus on today • See meals, workouts, and schedules on one clear Today screen • Complete meals and scheduled items with one tap • See pending routines first • Record a reason when an item cannot be completed • Check current weather with a compact icon and temperature Log workouts set by set • Enter repetitions for every set • Add optional weight for each set • Review completed workouts by date Manage weekly routines • Create weekday templates for meals, workouts, and schedules • Add the same routine to multiple days at once, then edit each day separately • Quickly select every day, weekdays, or weekends • Drag to reorder meals and workouts; scheduled items stay in time order • Import a weekly routine in JSON format • Set local notifications for scheduled items History, widgets, and Apple Watch • Review completion, skipped items, reasons, and workout logs by date • See a simple weekly completion rate without complicated charts • Check today's progress from the Home Screen widget • View, complete, or undo essential routines from Apple Watch • Keep today's progress in sync between iPhone and Apple Watch • Check today's progress from the Smart Stack Routine data is stored on your devices without an account or developer-operated server. The records needed by your paired Apple Watch sync between your devices. Location is used when requesting weather, and coordinates are not stored by the app. Workout and meal information is intended for personal planning and record keeping. It does not replace professional medical or nutrition advice. Have a feature idea or suggestion? Feel free to email bbiggu4195@gmail.com anytime.

Screenshots

FastTime4 screens
RoutineFlow4 screens

Verdict

The call

The clearest difference is ads: RoutineFlow at none against FastTime's shown. RoutineFlow also leads on update cadence (every 8 days vs every 6 weeks). FastTime's advantage is iOS requirement (15.0 vs 18.0). On price, 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

FastTime ships an update every 6 weeks, RoutineFlow every 8 days. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.

Scorecard3 real differences · 7 level
FastTime versus RoutineFlow: the parameters behind the verdict, then further details
ParameterFastTimeRoutineFlow
PriceFreeFree
Rating5.0 (1 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings1 — better—
Update frequencyEvery 6 weeksEvery 8 days — better
AdsYesNo — better
In-app purchasesNoNo
MonetizationAd-supported—
DevicesiPhone, iPad, iPod — betteriPhone, Apple Watch
Requires iOS15.0 — better18.0
Further details — not scored
Size40 MB4 MB
Age rating4+4+
DeveloperSeulki EomHyunJoon Kang

In-app purchases

None

FastTime

No in-app purchases

None

RoutineFlow

No in-app purchases

Questions

Is FastTime free?
FastTime is free to download, with no in-app purchases.
Is RoutineFlow free?
RoutineFlow is free to download, with no in-app purchases.
Do FastTime or RoutineFlow have ads?
FastTime shows ads; RoutineFlow does not.
Which is updated more often, FastTime or RoutineFlow?
FastTime ships an update every 6 weeks, and RoutineFlow every 8 days. Most recently, FastTime was updated on November 5, 2026 and RoutineFlow on October 31, 2026.

Other comparisons