# Isokinetix vs Interval Timer

The clearest difference is in-app purchases: Isokinetix at none against Interval Timer's 12. Isokinetix also leads on device support (3 vs 1) and iOS requirement (11.0.0 vs 16.0). Interval Timer's advantage is update cadence (every 4 weeks vs every 41 months). On price and ads there is nothing between them.

Both are free to download. Interval Timer sells 12 in-app purchases, starting at $1.99 per month. Isokinetix asks for nothing beyond the download.

Isokinetix ships an update every 41 months, Interval Timer every 4 weeks. The most recent releases landed on October 2, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | Isokinetix | Interval Timer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.7 (3.5K ratings)](https://appshunter.io/ios/app/interval-timer/id1610398390/reviews)** |
| Number of ratings | — | **3.5K** |
| Positive reviews | — | 66.5% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 41 months | **Every 4 weeks** |
| Monetization | — | Subscription |
| Size | 33 MB | 243 MB |
| Requires iOS | **11.0.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Krazy Cajun Hydraulic Training Co.](https://appshunter.io/developer/1571735229) | [HIIT Apps Sp. z o.o.](https://appshunter.io/developer/1713395721) |

## What reviewers say

### Isokinetix

[App page](https://appshunter.io/ios/app/isokinetix/id1571735227)

**Features:** macOS Compatibility

**In-app purchases:** none


### Interval Timer

[App page](https://appshunter.io/ios/app/interval-timer/id1610398390)

This app is a versatile interval timer designed for various training styles like Tabata and HIIT. It offers customizable workout parameters, voice guidance, and music ducking for an enhanced training experience. Save your custom workouts and track your progress.

**Highlights:** Customizable interval settings, Voice assistant with text-to-speech, Music ducking for audio integration, Save custom workouts, Tabata, Rounds, Stopwatch modes, Apple Health integration

**Features:** Family Sharing, Vision Pro support

**In-app purchases (12)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Intervals: monthly membership | $1.99 | per month |
| Intervals: membership | $3.99 | per 3 months |
| Intervals: monthly membership | $4.99 | per month |
| Intervals: yearly membership | $6.99 | per year |
| Intervals: yearly membership | $9.99 | per year |
| Intervals: yearly membership | $19.99 | per year |
| Intervals: yearly membership | $24.99 | per year |
| Intervals: membership | $24.99 | per year |
| Intervals \| PRO version | $14.99 | one-time |
| Intervals \| Membership | $14.99 | one-time |
| Intervals \| Membership | $34.99 | one-time |
| Intervals \| Membership | $39.99 | one-time |

**What reviewers like**

- 👍 Easy to use
- 🚀 Customizable workouts
- 🚀 Versatile and efficient
- 🚀 Helpful voice prompts
- 👍 Seamless music integration

**What reviewers complain about**

- 🐛 Bugs causing lost workouts
- 🔋 High battery consumption
- 💰 Subscription-based model
- 🔒 Forced free trial
- 🐛 Timing issues with intervals

**Reported bugs**

- Workouts disappearing
- App crashes and freezes
- Timing issues with intervals

**Requested features**

- Apple Watch integration
- More customization options
- Additional audio cues and prompts
- Improved workout tracking and history


## Frequently asked questions

### Is Isokinetix free?

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

### Is Interval Timer free?

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

### Do Isokinetix or Interval Timer have ads?

Neither Isokinetix nor Interval Timer shows ads.

### Which is updated more often, Isokinetix or Interval Timer?

Isokinetix ships an update every 41 months, and Interval Timer every 4 weeks. Most recently, Isokinetix was updated on October 2, 2026 and Interval Timer on October 17, 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.*