Comparison

Interval Walking Timer vs FastOn

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

Head to head
About

Interval Walking Timer

This app provides a simple timer for interval fast walking routines, automatically switching between slow and fast walking every 3 minutes. It offers real-time tracking of heart rate, distance, and time, with Apple Watch vibration notifications for mode changes. A summary screen displays post-workout metrics, and users can control music playback directly from the app.

Highlights
  • Interval timer for fast walking
  • Automatic mode switching (slow/fast walk)
  • Apple Watch vibration notifications
  • Real-time heart rate, distance, and time display
  • Post-workout summary with key metrics
  • Music and podcast playback control
Read full description

Simple timer for interval fast walking. It switches between slow walking mode and fast walking mode every 3 minutes. The Apple Watch vibrates to notify you when it is time to switch modes. Heart rate, total time, and total distance are displayed in real time, so you can monitor your current heart rate and adjust your walking speed to meet your target heart rate. Features: ・Simple timer for interval fast walking. ・Switch between slow walking mode and fast walking mode every 3 minutes. ・When the mode is switched, Apple Watch vibrates to notify you. ・Displays heart rate, total distance, and total time in real time. ・When finished, a summary screen is displayed, showing total time, total distance, total energy, average heart rate, and maximum heart rate. ・The Pause button can be used to pause the program. ・When starting, you can select whether to start in slow walk mode or fast walk mode. ・Slide the screen to the right to control music and podcasts.

About

FastOn

Features
Read full description

A fasting timer that lets you see what's happening inside your body — even without opening the app. FastOn helps you keep a 16-hour intermittent fast with a clean, focused timer. It works fully offline, needs no account, and keeps all your data on your device. VISUALIZE YOUR FAST As time passes, FastOn shows what's happening inside your body in real time: Digesting → Blood sugar → Fat burning → Ketosis → Autophagy → Growth hormone → Deep repair It's not just a countdown — knowing "fat burning starts soon" is what keeps you going. Tap any stage to learn the science behind it and what benefits to expect. FREE FEATURES - Start/stop a fast in one tap (backdate from your last meal) - Circular timer + real-time body stage - 16:8 plan - Streak tracking - Last 7 days of history - Water intake tracker - Mood & energy self-logging - Confetti celebration + SNS share card on completion PREMIUM - All plans (18:6 / 20:4 / OMAD / 5:2 / Custom) - Home screen Widget + Live Activity (remaining time & stage on Lock Screen and Dynamic Island) - Full statistics + insights - AI Advice (personalized tips based on your fasting patterns) - Weight tracking + goal weight line + HealthKit - 20 badges / achievements with categories - CSV data export - Eating window end & streak crisis notifications - No ads NOTE This app does not provide medical advice. Body-stage information is a general guideline based on common scientific knowledge and varies by individual. If you have a medical condition or are pregnant, please consult your doctor. SUBSCRIPTION - Monthly ¥480 / Yearly ¥2,900 (yearly includes a 7-day free trial) - Payment is charged to your Apple ID at confirmation. - It renews automatically unless auto-renew is turned off at least 24 hours before the end of the period. - Manage or cancel in Settings > Apple ID > Subscriptions. Terms of Use and Privacy Policy are available in the app settings and from the store links.

Screenshots

FastOn4 screens

Verdict

The call

The clearest difference is in-app purchases: Interval Walking Timer at none against FastOn's 3. Interval Walking Timer also leads on ads (none vs shown) and iOS requirement (13.0 vs 15.0). FastOn's advantage is update cadence (every 3 days vs every 14 months). On price 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. FastOn sells 3 in-app purchases, starting at $2.99 per month. Interval Walking Timer asks for nothing beyond the download.

UpkeepUpdate frequency

Interval Walking Timer ships an update every 14 months, FastOn every 3 days. The most recent releases landed on October 8, 2026 and September 21, 2026 respectively.

Scorecard4 real differences · 4 level
Interval Walking Timer versus FastOn: the parameters behind the verdict, then further details
ParameterInterval Walking TimerFastOn
PriceFreeFree
Positive reviews100.0% of reviews—
Update frequencyEvery 14 monthsEvery 3 days — better
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPod, Apple WatchiPhone, iPad, iPod
Requires iOS13.0 — better15.0
Further details — not scored
Size1 MB30 MB
Age rating4+4+
DeveloperTakahiro NakagawaMasahiro Akebi

In-app purchases

None

Interval Walking Timer

No in-app purchases

3 purchases

FastOn

Subscriptions2
  • Premium (Monthly)$2.991 Month
  • Premium (Yearly)7 Days trial$17.991 Year
One-time1
  • Premium (Lifetime)$22.99

Questions

Is Interval Walking Timer free?
Interval Walking Timer is free to download, with no in-app purchases.
Is FastOn free?
FastOn is free to download, with in-app purchases available.
Do Interval Walking Timer or FastOn have ads?
FastOn shows ads; Interval Walking Timer does not.
Which is updated more often, Interval Walking Timer or FastOn?
Interval Walking Timer ships an update every 14 months, and FastOn every 3 days. Most recently, Interval Walking Timer was updated on October 8, 2026 and FastOn on September 21, 2026.

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