# HIIT vs FitAssist

The clearest difference is in-app purchases: FitAssist at none against HIIT's 8. FitAssist also leads on update cadence (every 3 days vs every 2 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. HIIT sells 8 in-app purchases, starting at $0.99 per month. FitAssist asks for nothing beyond the download.

HIIT ships an update every 2 weeks, FitAssist every 3 days. The most recent releases landed on October 6, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | HIIT | FitAssist |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (34 ratings)](https://appshunter.io/ios/app/hiit-simple-interval-timer/id6449472984/reviews)** | — |
| Number of ratings | **34** | — |
| Positive reviews | 57.1% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 3 days** |
| Monetization | Free with in-app purchases | — |
| Size | 83 MB | 9 MB |
| Requires iOS | **17.0** | 17.1 |
| Devices | **iPhone, Apple Watch** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Maxim Kazakov](https://appshunter.io/developer/1290266003) | [ALEKSANDR POLEV](https://appshunter.io/developer/1804245864) |

## What reviewers say

### HIIT

[App page](https://appshunter.io/ios/app/hiit-simple-interval-timer/id6449472984)

Design and track custom interval running workouts with real-time data and audio cues. This app offers detailed post-run analysis and integrates with Apple Health and Apple Watch for phone-free training.

**Highlights:** Customizable intervals (time, distance, open), Support for HIIT, tempo, fartlek, pyramid, progression workouts, Real-time tracking of pace, cadence, heart rate, Audio cues for guidance, Phone-free Apple Watch operation, Post-run analysis and GPX export, Apple Health integration

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

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Monthly Day 2 | $0.99 | per month |
| Premium Weekly | $3.99 | per 7 days |
| Premium Monthly Day 1 | $4.99 | per month |
| Premium Monthly | $9.99 | per month |
| Premium 3 Months | $19.99 | per 3 months |
| Premium Annual Special Offer | $29.99 | per year |
| Interval Run Premium Yearly | $59.99 | per year |
| Intreval Run Premium Lifetime | $39.99 | one-time |


### FitAssist

[App page](https://appshunter.io/ios/app/fitassist-workout-assistant/id6749212213)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is HIIT free?

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

### Is FitAssist free?

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

### Do HIIT or FitAssist have ads?

Neither HIIT nor FitAssist shows ads.

### Which is updated more often, HIIT or FitAssist?

HIIT ships an update every 2 weeks, and FitAssist every 3 days. Most recently, HIIT was updated on October 6, 2026 and FitAssist on September 18, 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.*