# IntervalTimer(x) vs ZaWorld

IntervalTimer(x) and ZaWorld 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.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on September 17, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | IntervalTimer(x) | ZaWorld |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/intervaltimerx/id6745199760/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Monetization | Free | — |
| Size | 9 MB | 5 MB |
| Requires iOS | 18.1 | **17** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [ShapeHaven Innovations LLC](https://appshunter.io/developer/1747127977) | [OMTea App](https://appshunter.io/developer/1155973880) |

## What reviewers say

### IntervalTimer(x)

[App page](https://appshunter.io/ios/app/intervaltimerx/id6745199760)

This app provides a customizable interval timer for workouts, focus sessions, and breaks. It offers audio cues, visual progress, and tracks workout history locally. Optional body metrics can be entered for calorie estimates, all stored securely on your device.

**Highlights:** Customizable work/rest/sets intervals, Audio cues for transitions, Workout history log, Local calorie estimates, Offline functionality, Siri Shortcuts integration

**Features:** macOS Compatibility

**In-app purchases:** none


### ZaWorld

[App page](https://appshunter.io/ios/app/zaworld-limit-break-timer/id6747093351)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is IntervalTimer(x) free?

IntervalTimer(x) is free to download, with no in-app purchases.

### Is ZaWorld free?

ZaWorld is free to download, with no in-app purchases.

### Do IntervalTimer(x) or ZaWorld have ads?

Neither IntervalTimer(x) nor ZaWorld shows ads.

### Which is updated more often, IntervalTimer(x) or ZaWorld?

IntervalTimer(x) ships an update every 3 weeks, and ZaWorld every 3 weeks. Most recently, IntervalTimer(x) was updated on September 17, 2026 and ZaWorld on October 7, 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.*