Comparison

Power Interval Timer vs RoundBell

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

Head to head
About

Power Interval Timer

Features
Read full description

Power Interval Timer - Professional Workout Timer for Tabata, HIIT & Custom Intervals Transform your workouts with Power Interval Timer, a minimal, fast, and powerful interval training app designed for athletes. PERFECT FOR: • Tabata workouts (20s work, 10s rest) • HIIT (High-Intensity Interval Training) • Custom interval workouts • Circuit training • Cardio sessions • Strength training intervals • Home and gym workouts KEY FEATURES: MULTIPLE DISPLAY MODES 10 unique display styles (3 free, 7 premium): • Circular, Digital, Linear (Free) • Minimal, Analog, Dual, Chronograph, Segmented Circular, Minimalist, Nested Circular (Premium) FULLY CUSTOMIZABLE • Custom colors, font sizes (24-120pt), timer sizes • Custom stroke widths, letter spacing • Personal timer images from gallery AUDIO & HAPTICS • Multiple alert sounds (beep, bubble, high_beep, pop, tabata, whistle) • Countdown beeps (3-2-1), transition sounds, vibration • Custom sound selection, test before using TV & CASTING SUPPORT • Native Apple TV (tvOS) app • AirPlay casting support • Optimized TV layouts for large displays • Perfect for group workouts and gyms FLEXIBLE TIMER CONFIGURATION • Custom work duration (1-3600s) • Custom rest duration (1-3600s) • Rounds (1-1000) • Prepare phase with countdown • Cooldown period • Skip intervals during workout • Pause and resume anytime • Reset timer to start over • Work in background (timer continues when app is in background) SAVED TIMERS • Create and save custom timers (Premium: unlimited, Free: up to 2) • Save your favorite configurations • Drag-to-reorder timer list • Swipe-to-edit or delete • Quick access to saved workouts • Reset anytime BEAUTIFUL UI • Dark mode support • Light mode support • System theme auto-detection • Smooth animations • Responsive layouts for all devices • Optimized for phones, tablets, and TVs LOCALIZATION • 12 languages: English, Hebrew, Spanish, French, German, Italian, Portuguese, Russian, Japanese, Chinese, Arabic, Korean • 17 regional variants, RTL support RESPONSIVE LAYOUTS Optimized for phones, tablets, TVs, and casting PERFORMANCE • Works completely offline • No internet connection required • Fast and lightweight • Minimal battery usage • Instant timer start PERFECT FOR: Home workouts, gym training, outdoor workouts, group fitness, personal trainers, athletes PRIVACY • No data collection • No tracking • Works offline • Your workouts stay private Power Interval Timer is the perfect companion for interval training. Whether you're doing Tabata, HIIT, or custom workouts, this app provides everything you need in a clean, distraction-free interface. --- SUPPORT & FEEDBACK Have questions or suggestions? Contact us at zuki.apps.dev@gmail.com Visit our website: https://zukiapps.com/power-interval-timer Terms of Use: https://zukiapps.com/power-interval-timer/terms Privacy Policy: https://zukiapps.com/power-interval-timer/privacy

About

RoundBell

This interval timer app is designed for boxing, kickboxing, and martial arts training. It offers customizable round settings, audio and haptic alerts, and built-in presets. Track your training history and sync with Apple Health.

Highlights
  • Customizable round and interval times
  • Gong, horn, and countdown beeps
  • Voice alerts for remaining time
  • 6 built-in training presets
  • Save custom presets
  • Training history tracking
  • Apple Health integration
Features
Read full description

RoundBell is the ultimate interval timer for boxing, kickboxing, and martial arts training. FEATURES: - Round Timer: Customize round time, interval time, and total rounds - Gong & Horn: Round start/end gong sounds and warning horn before round ends - Countdown Beeps: Audio countdown for the final 3 seconds - Voice Alerts: "1 minute remaining" and "30 seconds remaining" voice notifications - 6 Built-in Presets: Beginner 1min, Boxing 3min, Kickboxing 2min, HIIT 30s, MMA 5min, and Tabata 20/10 - Custom Presets: Save favorite settings and switch instantly - Training History: Review completed sessions, streaks, and total rounds - Apple Health: Optionally save completed workouts - Haptic Feedback: Vibration notifications when sound isn't enough - Screen Wake Lock: Screen stays on during your workout - Japanese/English support PERFECT FOR: - Boxing and kickboxing training - Pad work and heavy bag sessions - Sparring round management - HIIT and interval training Clean dark theme design with large, easy-to-read timer display - visible from across the gym.

Screenshots

Power Interval Timer4 screens
RoundBell1 screens

Verdict

The call

The clearest difference is ads: RoundBell at none against Power Interval Timer's shown. On price, update cadence, 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. Power Interval Timer sells 1 one-off in-app purchase and RoundBell sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Power Interval Timer ships an update weekly, RoundBell every 6 days. The most recent releases landed on October 25, 2026 and October 31, 2026 respectively.

Scorecard1 real difference · 7 level
Power Interval Timer versus RoundBell: the parameters behind the verdict, then further details
ParameterPower Interval TimerRoundBell
PriceFreeFree
Positive reviews—100.0% of reviews
Update frequencyWeeklyEvery 6 days — better
AdsYesNo — better
In-app purchasesYesYes
Monetization—Free with in-app purchases
DevicesiPhone, iPad, Apple Watch — betteriPhone, iPad
Requires iOS17.017.0
Further details — not scored
Size37 MB5 MB
Age rating4++4
DeveloperLior ZukmanStarcrown Inc

In-app purchases

1 purchases

Power Interval Timer

One-time1
  • Premium Upgrade$2.99
3 purchases

RoundBell

One-time3
  • Coffee$0.49
  • Cookie$2.99
  • Cake$6.99

Questions

Is Power Interval Timer free?
Power Interval Timer is free to download, with in-app purchases available.
Is RoundBell free?
RoundBell is free to download, with in-app purchases available.
Do Power Interval Timer or RoundBell have ads?
Power Interval Timer shows ads; RoundBell does not.
Which is updated more often, Power Interval Timer or RoundBell?
Power Interval Timer ships an update weekly, and RoundBell every 6 days. Most recently, Power Interval Timer was updated on October 25, 2026 and RoundBell on October 31, 2026.

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