# SmartHIIT vs RoundShift

The clearest difference is update cadence: RoundShift at every 2 days against SmartHIIT's every 4 days. RoundShift also leads on device support (4 vs 1) and iOS requirement (15.0 vs 18.5). On price, ads and in-app purchases there is nothing between them.

Both are free to download. SmartHIIT sells 2 in-app purchases, starting at $4.99 per month and RoundShift sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

SmartHIIT ships an update every 4 days, RoundShift every 2 days. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | SmartHIIT | 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 | No | No |
| Update frequency | Every 4 days | **Every 2 days** |
| Monetization | — | Free with in-app purchases |
| Size | 33 MB | 143 MB |
| Requires iOS | 18.5 | **15.0** |
| Devices | iPhone | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Diego Dias de Macedo](https://appshunter.io/developer/1293397655) | [Carl Law](https://appshunter.io/developer/1671704999) |

## What reviewers say

### SmartHIIT

[App page](https://appshunter.io/ios/app/smarthiit-quick-workouts/id6754564855)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SmartHIIT Pro Monthly | $4.99 | per month |
| SmartHIIT Pro Annual | $34.99 | per year |


### 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 SmartHIIT free?

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

### Is RoundShift free?

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

### Do SmartHIIT or RoundShift have ads?

Neither SmartHIIT nor RoundShift shows ads.

### Which is updated more often, SmartHIIT or RoundShift?

SmartHIIT ships an update every 4 days, and RoundShift every 2 days. Most recently, SmartHIIT was updated on November 5, 2026 and RoundShift on October 31, 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.*