Comparison

FastBell vs Aruki

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

Head to head
About

FastBell

Features
Read full description

FastBell is the simplest way to start intermittent fasting. When the bell rings, eat. When it rings again, stop. Simple enough to stick with. 6 FASTING PLANS - 12:12 — 12 hours fasting / 12 hours eating (free, gentle start) - 14:10 — 14 hours fasting / 10 hours eating (free, easy intro) - 16:8 — 16 hours fasting / 8 hours eating (most popular) - 18:6 — 18 hours fasting / 6 hours eating - 20:4 — 20 hours fasting / 4 hours eating - OMAD — One Meal A Day (23:1) KEY FEATURES - Large countdown timer shows remaining time at a glance - Start and stop fasting with a single tap - Streak tracking to build your fasting habit - Push notifications when fasting starts and ends - Dark theme for comfortable nighttime use - Fully offline — no internet required - No ads — stay focused PRIVACY FIRST All data stays on your device. Nothing is ever sent to a server. FASTBELL PRO Upgrade to Pro to unlock the 16:8, 18:6, 20:4, and OMAD plans, detailed statistics, custom notifications, and widgets. 12:12 and 14:10 are free. Subscription Info: - Weekly, monthly, and yearly plans available - Billing begins after you confirm the selected plan - Payment is charged to your Apple ID account - Subscription auto-renews unless canceled at least 24 hours before the end of the current period - Manage or cancel in Settings > Apple ID > Subscriptions Terms of Use (Apple Standard EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://starcrown.co.jp/privacy

About

Aruki

Features
Read full description

Walk briskly. Slow down. Repeat. Aruki guides your Japanese Interval Walking workout with clear voice and vibration cues, so you can keep your phone in your pocket and focus on your walk. Aruki is a simple interval walking timer and coach built around the Japanese Interval Walking method. Follow alternating fast and slow walking intervals without constantly watching the clock. Whether you're walking outdoors or on a treadmill, Aruki keeps your workout structured from start to finish. HOW IT WORKS Start your walk and let Aruki guide every interval. When it's time to walk faster or slow down, you'll hear a voice cue and feel a vibration. No need to check the screen or remember when to switch. Just walk, follow the cues, and stay in rhythm. FEATURES Voice & vibration cues Know exactly when to switch between fast and slow intervals without watching your phone. Japanese Interval Walking Follow the structured fast-and-slow walking method with a simple guided timer. Interval walking timer Stay on track throughout your workout with clear interval and countdown guidance. Walking history Keep a record of your completed walks and review your activity over time. Progress tracking See how consistently you're walking and follow your progress from one workout to the next. Detailed statistics Review your walking activity and workout trends in one place. Outdoor & treadmill walking Use Aruki wherever you prefer to walk, whether you're outside or on a treadmill. Dark mode Enjoy a comfortable interface in low-light conditions. Simple, distraction-free design Everything you need for your walk without unnecessary complexity. WHY ARUKI? Aruki is designed around one simple idea: you shouldn't have to stare at a timer while exercising. Put your phone away, start your workout, and let Aruki tell you when it's time to change pace. Use voice cues with your headphones or rely on vibration when you want to walk without audio. It's a simple way to make interval walking more structured and easier to follow. ARUKI PREMIUM Upgrade to Aruki Premium to unlock the complete Aruki experience: • Unlimited walking history • Custom fast and slow interval durations • Advanced insights with monthly summaries, filters, and sorting • Ad-free experience SUBSCRIPTION DETAILS Aruki Premium is available as an auto-renewable yearly subscription. The price shown in the app applies to your local App Store storefront. Payment is charged to your Apple ID when you confirm your purchase. Your subscription automatically renews unless canceled at least 24 hours before the current subscription period ends. You can manage or cancel your subscription at any time through your Apple ID account settings. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://sites.google.com/view/aruki-ios/privacy-policy

Screenshots

FastBell3 screens
Aruki4 screens

Verdict

The call

FastBell and Aruki are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Scored on Price Ā· Rating Ā· Positive reviews Ā· Number of ratings Ā· Update frequency Ā· Ads Ā· In-app purchases Ā· Monetization Ā· Best chart rank Ā· Devices Ā· Requires iOS

CostPrice Ā· In-app purchases Ā· Ads Ā· Monetization

Both are free to download. FastBell sells 1 in-app purchase, starting at $0.99 per 7 days and Aruki sells 1 in-app purchase, starting at $9.99 per year. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 5 days. The most recent releases landed on October 22, 2026 and October 8, 2026 respectively.

ScorecardNo meaningful differences
FastBell versus Aruki: the parameters behind the verdict, then further details
ParameterFastBellAruki
PriceFreeFree
Update frequencyEvery 5 daysEvery 5 days
AdsNoNo
In-app purchasesYesYes
DevicesiPhone, iPadiPhone, Apple Watch
Requires iOS17.0 — better18.6
Further details — not scored
Size4 MB27 MB
Age rating4+4+
DeveloperStarcrown IncAbhimanyu Sharma

In-app purchases

1 purchases

FastBell

Subscriptions1
  • FastBell Pro Weekly3 Days trial$0.997 Days
1 purchases

Aruki

Subscriptions1
  • Aruki Premium$9.991 Year

Questions

Is FastBell free?
FastBell is free to download, with in-app purchases available.
Is Aruki free?
Aruki is free to download, with in-app purchases available.
Do FastBell or Aruki have ads?
Neither FastBell nor Aruki shows ads.
Which is updated more often, FastBell or Aruki?
FastBell ships an update every 5 days, and Aruki every 5 days. Most recently, FastBell was updated on October 22, 2026 and Aruki on October 8, 2026.

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