# Subintervals vs Tarmac Trainer

The clearest difference is in-app purchases: Tarmac Trainer at none against Subintervals's 4. Subintervals's advantage is iOS requirement (16.4 vs 18.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Subintervals sells 4 one-off in-app purchases. Tarmac Trainer asks for nothing beyond the download.

Subintervals ships an update weekly, Tarmac Trainer every 5 days. The most recent releases landed on October 24, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Subintervals | Tarmac Trainer |
| --- | --- | --- |
| 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 | **No** |
| Ads | No | No |
| Update frequency | Weekly | **Every 5 days** |
| Monetization | Free with in-app purchases | — |
| Size | 109 MB | 225 MB |
| Requires iOS | **16.4** | 18.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Inaki Arroyo Nebreda](https://appshunter.io/developer/1736987639) | [iJisho](https://appshunter.io/developer/286264162) |

## 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 |


### Tarmac Trainer

[App page](https://appshunter.io/ios/app/tarmac-trainer/id6739281799)

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

**In-app purchases:** none


## Frequently asked questions

### Is Subintervals free?

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

### Is Tarmac Trainer free?

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

### Do Subintervals or Tarmac Trainer have ads?

Neither Subintervals nor Tarmac Trainer shows ads.

### Which is updated more often, Subintervals or Tarmac Trainer?

Subintervals ships an update weekly, and Tarmac Trainer every 5 days. Most recently, Subintervals was updated on October 24, 2026 and Tarmac Trainer on October 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.*