# RunPredict vs Running Writings Lab

The clearest difference is price: RunPredict at Free against Running Writings Lab's $9.99. Running Writings Lab's advantage is chart position (#29 vs unranked). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

RunPredict is free to download; Running Writings Lab costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | RunPredict | Running Writings Lab |
| --- | --- | --- |
| Price | **Free** | $9.99 |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/running-writings-lab/id6807671361/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Monetization | — | Paid |
| Best chart rank | — | **#29** |
| Size | 5 MB | 4 MB |
| Requires iOS | 17.6 | **17.0** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Charles Zimmerlin](https://appshunter.io/developer/1680182934) | [Running Writings](https://appshunter.io/developer/6807671363) |

## What reviewers say

### RunPredict

[App page](https://appshunter.io/ios/app/runpredict-pace-calculator/id6757186336)

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

**In-app purchases:** none


### Running Writings Lab

[App page](https://appshunter.io/ios/app/running-writings-lab/id6807671361)

**Currently charting:** #29 Top Paid · Sports (US App Store)

This app offers ten scientific running calculators for race pace, physiological thresholds, and environmental adjustments like hills, heat, and wind. It provides tools for serious runners to plan training and optimize race performance, all built on published research.

**Highlights:** Race pace and split calculators, Physiological threshold calculations, Grade-adjusted pace for hills, Heat and wind adjustment tools, Offline functionality, Haptic dials for input

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

**In-app purchases:** none


## Frequently asked questions

### Is RunPredict free?

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

### Is Running Writings Lab free?

Running Writings Lab costs $9.99, with no in-app purchases.

### Do RunPredict or Running Writings Lab have ads?

Neither RunPredict nor Running Writings Lab shows ads.

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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.*