# Power Interval Timer vs RoundBell

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.

Both are free to download. Power Interval Timer sells 1 one-off in-app purchase. RoundBell asks for nothing beyond the download.

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.

## The numbers

| Metric | Power Interval Timer | RoundBell |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Weekly | **Every 5 days** |
| Monetization | — | Free |
| Size | 37 MB | 3 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | **iPhone, iPad, Apple Watch** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Lior Zukman](https://appshunter.io/developer/1845410217) | [Starcrown Inc](https://appshunter.io/developer/1082624152) |

## What reviewers say

### Power Interval Timer

[App page](https://appshunter.io/ios/app/power-interval-timer/id6758246007)

**Features:** macOS Compatibility, Apple Watch app

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Upgrade | $2.99 | one-time |


### RoundBell

[App page](https://appshunter.io/ios/app/roundbell-boxing-timer/id6761452918)

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:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked 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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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*