# Interval Timer by STRNTH vs RoundShift

The clearest difference is ads: RoundShift at none against Interval Timer by STRNTH's shown. RoundShift also leads on update cadence (every 2 days vs every 3 weeks). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Interval Timer by STRNTH sells 1 one-off in-app purchase and RoundShift sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Interval Timer by STRNTH ships an update every 3 weeks, RoundShift every 2 days. Both last shipped on November 10, 2026.

## The numbers

| Metric | Interval Timer by STRNTH | RoundShift |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/roundshift-interval-timer/id6793125180/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 3 weeks | **Every 2 days** |
| Monetization | — | Free with in-app purchases |
| Size | 56 MB | 143 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPad, iPod, Apple Watch | iPhone, iPad, iPod, Apple Watch |
| Age rating | 12+ | 4+ |
| Developer | [Next Big Leap Ltd](https://appshunter.io/developer/369344938) | [Carl Law](https://appshunter.io/developer/1671704999) |

## What reviewers say

### Interval Timer by STRNTH

[App page](https://appshunter.io/ios/app/interval-timer-by-strnth/id6787253056)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove ads | $9.99 | one-time |


### RoundShift

[App page](https://appshunter.io/ios/app/roundshift-interval-timer/id6793125180)

This interval timer app provides voice coaching for various workout types, allowing you to keep your eyes on your exercise rather than the screen. It offers customizable presets, multiple voice options, and can even display workouts on a larger screen for group sessions. Advanced features like adaptive rest and Apple Health integration are available with a Pro upgrade.

**Highlights:** Voice coaching for workouts, Customizable interval presets, Plain language workout builder, Multi-language coach voices, Screen-off and face-down operation, AirPlay for group sessions, Adaptive rest with Apple Watch

**Features:** Apple Watch app

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Intervo Pro (Lifetime) | $4.99 | one-time |


## Frequently asked questions

### Is Interval Timer by STRNTH free?

Interval Timer by STRNTH is free to download, with in-app purchases available.

### Is RoundShift free?

RoundShift is free to download, with in-app purchases available.

### Do Interval Timer by STRNTH or RoundShift have ads?

Interval Timer by STRNTH shows ads; RoundShift does not.

### Which is updated more often, Interval Timer by STRNTH or RoundShift?

Interval Timer by STRNTH ships an update every 3 weeks, and RoundShift every 2 days. Most recently, Interval Timer by STRNTH was updated on November 10, 2026 and RoundShift on November 10, 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.*