# Subintervals vs RunningCalc

The clearest difference is in-app purchases: RunningCalc at none against Subintervals's 4. Subintervals's advantage is iOS requirement (15.1 vs 17.6). On price, rating, ratings volume and update cadence there is nothing between them.

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

On the App Store both sit at effectively the same score — 5.0 for Subintervals against 5.0 for RunningCalc. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

Subintervals ships an update weekly, RunningCalc every 5 days. The most recent releases landed on September 10, 2026 and June 11, 2026 respectively.

## The numbers

| Metric | Subintervals | RunningCalc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/subintervals/id6479748688/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/runningcalc/id6743201791/reviews) |
| Number of ratings | **2** | 1 |
| 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 | **Free** |
| Size | 95 MB | 2 MB |
| Requires iOS | **15.1** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Inaki Arroyo Nebreda](https://appshunter.io/developer/1736987639) | [Byung Hyun Martin Larvia](https://appshunter.io/developer/1801911344) |

## 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 |


### RunningCalc

[App page](https://appshunter.io/ios/app/runningcalc/id6743201791)

This app helps runners calculate and convert running pace, speed, distance, and time. It offers features like pace calculation, pace band generation, and split analysis to aid in workout planning and race preparation.

**Highlights:** Pace, speed, and distance calculation, Customizable pace band generator, Split analysis for runs, Cheat sheet creator for pace/speed conversion, Flexible unit support (km, miles, km/h, mph), Light and dark mode

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Subintervals free?

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

### Is RunningCalc free?

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

### Which has better reviews, Subintervals or RunningCalc?

Subintervals and RunningCalc are both rated 5.0 out of 5 on the App Store, from 2 and 1 ratings respectively.

### Do Subintervals or RunningCalc have ads?

Neither Subintervals nor RunningCalc shows ads.

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

Subintervals ships an update weekly, and RunningCalc every 5 days. Most recently, Subintervals was updated on September 10, 2026 and RunningCalc on June 11, 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.*