# Wall Shelf Sort 3D vs Contra

The clearest difference is in-app purchases: Wall Shelf Sort 3D at none against Contra's 2. Wall Shelf Sort 3D also leads on update cadence (daily vs every 2 months) and iOS requirement (13.0 vs 15.1). Contra's advantage is ads (none vs shown). On price and device support there is nothing between them.

Both are free to download. Contra sells 2 in-app purchases, starting at $4.99 per month. Wall Shelf Sort 3D asks for nothing beyond the download.

Wall Shelf Sort 3D ships an update daily, Contra every 2 months. The most recent releases landed on October 13, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | Wall Shelf Sort 3D | Contra |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | **Daily** | Every 2 months |
| Monetization | — | Freemium |
| Size | 347 MB | 75 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 9+ |
| Developer | [Aziza Rahman](https://appshunter.io/developer/1705160547) | [Taj Singh](https://appshunter.io/developer/1847074810) |

## What reviewers say

### Wall Shelf Sort 3D

[App page](https://appshunter.io/ios/app/wall-shelf-sort-3d/id6479971254)

**Features:** macOS Compatibility

**In-app purchases:** none


### Contra

[App page](https://appshunter.io/ios/app/contra/id6761030724)

Engage in structured debates with an AI opponent to sharpen your critical thinking skills. Receive detailed feedback on your logic, rhetoric, evidence, and originality. Practice solo, challenge friends, or join public arenas on diverse topics.

**Highlights:** AI argumentative opponent, Detailed performance scoring, AI coaching and feedback, Solo and 1v1 challenges, Public debate arenas, Daily new topics, Real-time streaming debates

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $4.99 | per month |
| Abonnement annuel | $39.99 | per year |


## Frequently asked questions

### Is Wall Shelf Sort 3D free?

Wall Shelf Sort 3D is free to download, with no in-app purchases.

### Is Contra free?

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

### Do Wall Shelf Sort 3D or Contra have ads?

Wall Shelf Sort 3D shows ads; Contra does not.

### Which is updated more often, Wall Shelf Sort 3D or Contra?

Wall Shelf Sort 3D ships an update daily, and Contra every 2 months. Most recently, Wall Shelf Sort 3D was updated on October 13, 2026 and Contra on September 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.*