# Algo Viewer vs C# Data Structures & Algo

The clearest difference is in-app purchases: C# Data Structures & Algo at none against Algo Viewer's 1. C# Data Structures & Algo also leads on iOS requirement (17.0 vs 26.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Algo Viewer sells 1 one-off in-app purchase. C# Data Structures & Algo asks for nothing beyond the download.

Algo Viewer ships an update every 6 weeks, C# Data Structures & Algo every 2 months. The most recent releases landed on October 26, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | Algo Viewer | C# Data Structures & Algo |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 2 months |
| Size | 22 MB | 19 MB |
| Requires iOS | 26.0 | **17.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | +4 | 4+ |
| Developer | [Abraham Abreu](https://appshunter.io/developer/1260832200) | [ALG Software Lab](https://appshunter.io/developer/1650561236) |

## What reviewers say

### Algo Viewer

[App page](https://appshunter.io/ios/app/algo-viewer/id6754825780)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Unlock | $0.99 | one-time |


### C# Data Structures & Algo

[App page](https://appshunter.io/ios/app/c-data-structures-and-algo/id6756707070)

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

**In-app purchases:** none


## Frequently asked questions

### Is Algo Viewer free?

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

### Is C# Data Structures & Algo free?

C# Data Structures & Algo is free to download, with no in-app purchases.

### Do Algo Viewer or C# Data Structures & Algo have ads?

Neither Algo Viewer nor C# Data Structures & Algo shows ads.

### Which is updated more often, Algo Viewer or C# Data Structures & Algo?

Algo Viewer ships an update every 6 weeks, and C# Data Structures & Algo every 2 months. Most recently, Algo Viewer was updated on October 26, 2026 and C# Data Structures & Algo on October 19, 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.*