# Subintervals vs Musette Fuel

The clearest difference is update cadence: Subintervals at weekly against Musette Fuel's fortnightly. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Subintervals sells 4 one-off in-app purchases and Musette Fuel sells 2 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

Subintervals ships an update weekly, Musette Fuel fortnightly. The most recent releases landed on November 4, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Subintervals | Musette Fuel |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/subintervals/id6479748688/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Fortnightly |
| Monetization | Free with in-app purchases | — |
| Size | 109 MB | 11 MB |
| Requires iOS | 16.4 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Inaki Arroyo Nebreda](https://appshunter.io/developer/1736987639) | [Ceri Pritchard](https://appshunter.io/developer/6795530952) |

## What reviewers say

### Subintervals

[App page](https://appshunter.io/ios/app/subintervals/id6479748688)

Visualize your training data with detailed displays and interactive graphs. Customize your analysis and sync seamlessly with intervals.icu for up-to-the-minute insights into activities, events, and performance metrics.

**Highlights:** Detailed activity and event visualization, Interactive performance graphs, Seamless intervals.icu sync, Customizable data analysis, Actionable training insights

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Coffee | $3.99 | one-time |
| Lunch | $11.99 | one-time |
| Big Thanks | $17.99 | one-time |
| Sponsor | $44.99 | one-time |


### Musette Fuel

[App page](https://appshunter.io/ios/app/musette-fuel/id6795530950)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Musette Connected Monthly | $1.99 | per month |
| Musette Connected Annual | $14.99 | per year |


## Frequently asked questions

### Is Subintervals free?

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

### Is Musette Fuel free?

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

### Do Subintervals or Musette Fuel have ads?

Neither Subintervals nor Musette Fuel shows ads.

### Which is updated more often, Subintervals or Musette Fuel?

Subintervals ships an update weekly, and Musette Fuel fortnightly. Most recently, Subintervals was updated on November 4, 2026 and Musette Fuel 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.*