# One Step Challenges vs ScanLean AI

The clearest difference is update cadence: One Step Challenges at every 3 days against ScanLean AI's every 6 days. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. One Step Challenges sells 2 in-app purchases, starting at $4.99 per month and ScanLean AI sells 2 in-app purchases, starting at $7.99 per month. Whichever you choose, the download price is not the number that matters.

One Step Challenges ships an update every 3 days, ScanLean AI every 6 days. The most recent releases landed on October 10, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | One Step Challenges | ScanLean AI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/scanlean-ai/id6799600859/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 6 days |
| Monetization | — | Free with in-app purchases |
| Size | 30 MB | 59 MB |
| Requires iOS | **15.1** | 16.4 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 12+ | 4+ |
| Developer | [JUSTIN MORGAN MAYEUR](https://appshunter.io/developer/1896273983) | [Growthvault LLC](https://appshunter.io/developer/1895801107) |

## What reviewers say

### One Step Challenges

[App page](https://appshunter.io/ios/app/one-step-challenges/id6766305390)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| One Step Pro Monthly | $4.99 | per month |
| One Step Pro Annual | $34.99 | per year |


### ScanLean AI

[App page](https://appshunter.io/ios/app/scanlean-ai/id6799600859)

This app uses AI to analyze your body from a photo and calculate body fat percentage. It offers personalized meal and workout plans with a subscription to help you achieve your fitness goals. Track your progress over time by rescanning every four weeks.

**Highlights:** AI body fat percentage scan, Personalized meal plans, Custom workout plans, Calorie target calculation, Progress tracking, Body transformation goals

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ScanLean Pro monthly | $7.99 | per month |
| ScanLean Pro Annual | $49.99 | per year |


## Frequently asked questions

### Is One Step Challenges free?

One Step Challenges is free to download, with in-app purchases available.

### Is ScanLean AI free?

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

### Do One Step Challenges or ScanLean AI have ads?

Neither One Step Challenges nor ScanLean AI shows ads.

### Which is updated more often, One Step Challenges or ScanLean AI?

One Step Challenges ships an update every 3 days, and ScanLean AI every 6 days. Most recently, One Step Challenges was updated on October 10, 2026 and ScanLean AI on October 13, 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.*