# Jim's Challenge vs Modstack

The clearest difference is in-app purchases: Jim's Challenge at none against Modstack's 1. Modstack's advantage is device support. On price and iOS requirement there is nothing between them.

Both are free to download. Modstack sells 1 one-off in-app purchase. Jim's Challenge asks for nothing beyond the download.

## The numbers

| Metric | Jim's Challenge | Modstack |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | — | No |
| Update frequency | — | Every 8 days |
| Size | 64 MB | 30 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | — | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Jimil Burkhart](https://appshunter.io/developer/1732950709) | [NovoBuild LLC](https://appshunter.io/developer/1784126512) |

## What reviewers say

### Jim's Challenge

[App page](https://appshunter.io/ios/app/jims-challenge/id6760668387)

**In-app purchases:** none


### Modstack

[App page](https://appshunter.io/ios/app/modstack-programming-puzzle/id6803866356)

**Features:** Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Full Modstack | $3.99 | one-time |


## Frequently asked questions

### Is Jim's Challenge free?

Jim's Challenge is free to download, with no in-app purchases.

### Is Modstack free?

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

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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.*