# Justfit vs Interval Trainer

The clearest difference is in-app purchases: Interval Trainer at none against Justfit's 4. Justfit's advantage is update cadence (every 3 days vs every 15 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Justfit sells 4 in-app purchases, starting at $1.99 per month. Interval Trainer asks for nothing beyond the download.

Justfit ships an update every 3 days, Interval Trainer every 15 months. The most recent releases landed on October 3, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | Justfit | Interval Trainer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/justfit-interval-timer-clock/id6449503037/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 15 months |
| Monetization | Freemium | — |
| Size | 104 MB | 40 MB |
| Requires iOS | **15.0** | 16.4 |
| Devices | iPhone, iPod, Apple Watch | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Ferda Nahit Fidanci](https://appshunter.io/developer/1689464732) | [Luke Taylor](https://appshunter.io/developer/1609194513) |

## What reviewers say

### Justfit

[App page](https://appshunter.io/ios/app/justfit-interval-timer-clock/id6449503037)

This app provides customizable interval timers for various activities like HIIT, Tabata, meditation, and studying. Track your progress with detailed history and analytics, and personalize your experience with custom sounds and colors.

**Highlights:** Fully customizable interval timers, Full-screen circular countdown/countup stopwatch, Pre-made templates for HIIT, Tabata, Meditation, Customizable audio for intervals, sets, and rest, Detailed progress tracking and analytics, Timer sharing via export/import, Multilanguage support

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $1.99 | per month |
| Annual | $7.99 | per year |
| Lifetime Access | $3.99 | one-time |
| Lifetime Access | $7.99 | one-time |


### Interval Trainer

[App page](https://appshunter.io/ios/app/interval-trainer/id6477546684)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Justfit free?

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

### Is Interval Trainer free?

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

### Do Justfit or Interval Trainer have ads?

Neither Justfit nor Interval Trainer shows ads.

### Which is updated more often, Justfit or Interval Trainer?

Justfit ships an update every 3 days, and Interval Trainer every 15 months. Most recently, Justfit was updated on October 3, 2026 and Interval Trainer on September 28, 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.*