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 times, audio cues, and voice alerts to keep you on track during workouts. Save your preferred settings for quick access and enjoy a clear, large display visible from a distance.

Highlights
  • Customizable round and interval times
  • Gong and horn sound alerts
  • Audio countdowns and voice notifications
  • Save and load custom presets
  • Haptic feedback for notifications
  • Screen wake lock for continuous display
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
RoundBell3 screens

Verdict

The call

The clearest difference is in-app purchases: RoundBell at none against Power Interval Timer's 1. RoundBell also leads on ads (none vs shown). Power Interval Timer's advantage is device support (3 vs 1). On price, update cadence and iOS requirement 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. RoundBell asks for nothing beyond the download.

UpkeepUpdate frequency

Power Interval Timer ships an update weekly, RoundBell every 5 days. The most recent releases landed on September 10, 2026 and September 20, 2026 respectively.

Scorecard3 real differences · 5 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 5 days — better
AdsYesNo — better
In-app purchasesYesNo — better
Monetization—Free
DevicesiPhone, iPad, Apple Watch — betteriPhone
Requires iOS17.017.0
Further details — not scored
Size37 MB3 MB
Age rating4+4+
DeveloperLior ZukmanStarcrown Inc

In-app purchases

1 purchases

Power Interval Timer

One-time1
  • Premium Upgrade$2.99
None

RoundBell

No in-app purchases

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 no in-app purchases.
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 5 days. Most recently, Power Interval Timer was updated on September 10, 2026 and RoundBell on September 20, 2026.

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