# FeedZ2 vs Subintervals

The clearest difference is in-app purchases: FeedZ2 at none against Subintervals's 4. FeedZ2 also leads on iOS requirement (11.0 vs 15.1). 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. FeedZ2 asks for nothing beyond the download.

FeedZ2 ships an update every 10 days, Subintervals weekly. The most recent releases landed on July 16, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | FeedZ2 | Subintervals |
| --- | --- | --- |
| 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 | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 10 days | **Weekly** |
| Monetization | — | Free with in-app purchases |
| Size | 361 MB | 95 MB |
| Requires iOS | **11.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Prieto-Bellver SL](https://appshunter.io/developer/1683500184) | [Inaki Arroyo Nebreda](https://appshunter.io/developer/1736987639) |

## What reviewers say

### FeedZ2

[App page](https://appshunter.io/ios/app/feedz2/id6448104562)

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is FeedZ2 free?

FeedZ2 is free to download, with no in-app purchases.

### Is Subintervals free?

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

### Do FeedZ2 or Subintervals have ads?

Neither FeedZ2 nor Subintervals shows ads.

### Which is updated more often, FeedZ2 or Subintervals?

FeedZ2 ships an update every 10 days, and Subintervals weekly. Most recently, FeedZ2 was updated on July 16, 2026 and Subintervals on September 10, 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.*