# 3AK Sprinting vs Carus App

The clearest difference is in-app purchases: Carus App at none against 3AK Sprinting's 10. Carus App also leads on iOS requirement (15.1 vs 18.0). 3AK Sprinting's advantage is chart position (#146 vs unranked). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. 3AK Sprinting sells 9 in-app purchases, starting at $6.99 per 7 days. Carus App asks for nothing beyond the download.

3AK Sprinting ships an update every 5 days, Carus App every 9 days. The most recent releases landed on November 5, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | 3AK Sprinting | Carus App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (2.4K ratings)](https://appshunter.io/ios/app/3ak-sprinting/id6756290066/reviews)** | — |
| Number of ratings | **2.4K** | — |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 5 days** | Every 9 days |
| Monetization | Subscription | — |
| Best chart rank | **#146** | — |
| Size | 66 MB | 32 MB |
| Requires iOS | 18.0 | **15.1** |
| Devices | **iPhone, iPad, Apple Watch** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [CHRISTIAN MICAH JONES](https://appshunter.io/developer/1859885443) | [KYLE ZONGHAO WANG](https://appshunter.io/developer/1894392285) |

## What reviewers say

### 3AK Sprinting

[App page](https://appshunter.io/ios/app/3ak-sprinting/id6756290066)

**Currently charting:** #146 Top Grossing · Sports, #209 Top Free · Sports (US App Store)

This app provides advanced AI-powered tools for runners, including stride analysis, personalized coaching, and structured workout programs. It also features nutrition tracking and daily challenges to help athletes improve performance and build discipline.

**Highlights:** AI stride and form analysis, Personalized AI coaching, Custom workout programs, Smart nutrition tracking, Daily challenges, Performance tracking and analytics

**Features:** Family Sharing, Apple Watch app, Vision Pro support

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $6.99 | per 7 days |
| Weekly Pro | $9.99 | per 7 days |
| Monthly | $9.99 | per month |
| Yearly | $29.99 | per year |
| Yearly | $29.99 | per year |
| Yearly | $39.99 | per year |
| Yearly | $39.99 | per year |
| Yearly | $39.99 | per year |
| Yearly | $49.99 | per year |


### Carus App

[App page](https://appshunter.io/ios/app/carus-app/id6762496906)

**In-app purchases:** none


## Frequently asked questions

### Is 3AK Sprinting free?

3AK Sprinting is free to download, with in-app purchases available.

### Is Carus App free?

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

### Do 3AK Sprinting or Carus App have ads?

Neither 3AK Sprinting nor Carus App shows ads.

### Which is updated more often, 3AK Sprinting or Carus App?

3AK Sprinting ships an update every 5 days, and Carus App every 9 days. Most recently, 3AK Sprinting was updated on November 5, 2026 and Carus App on October 25, 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.*