# Baselproblem vs Data Structures and Algorithms

The clearest difference is in-app purchases: Baselproblem at none against Data Structures and Algorithms's 1. Baselproblem also leads on iOS requirement (15.0 vs 17.0). Data Structures and Algorithms's advantage is update cadence (every 10 days vs every 11 months). On price, ads and device support there is nothing between them.

Both are free to download. Data Structures and Algorithms sells 1 one-off in-app purchase. Baselproblem asks for nothing beyond the download.

Baselproblem ships an update every 11 months, Data Structures and Algorithms every 10 days. Both last shipped on September 29, 2026.

## The numbers

| Metric | Baselproblem | Data Structures and Algorithms |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 11 months | **Every 10 days** |
| Size | 0 MB | 36 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Andreas Horvath](https://appshunter.io/developer/1484572340) | [子健 高](https://appshunter.io/developer/1791450219) |

## What reviewers say

### Baselproblem

[App page](https://appshunter.io/ios/app/baselproblem/id1484572342)

**Features:** macOS Compatibility

**In-app purchases:** none


### Data Structures and Algorithms

[App page](https://appshunter.io/ios/app/data-structures-and-algorithms/id6783425095)

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| DSA | $2.99 | one-time |


## Frequently asked questions

### Is Baselproblem free?

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

### Is Data Structures and Algorithms free?

Data Structures and Algorithms is free to download, with in-app purchases available.

### Do Baselproblem or Data Structures and Algorithms have ads?

Neither Baselproblem nor Data Structures and Algorithms shows ads.

### Which is updated more often, Baselproblem or Data Structures and Algorithms?

Baselproblem ships an update every 11 months, and Data Structures and Algorithms every 10 days. Most recently, Baselproblem was updated on September 29, 2026 and Data Structures and Algorithms on September 29, 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.*