# Opti vs 3D Dekalb

The clearest difference is device support: Opti at 2 against 3D Dekalb's —. 3D Dekalb's advantage is iOS requirement (11.0 vs 15.1). On price and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | Opti | 3D Dekalb |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | — |
| Update frequency | Every 6 weeks | — |
| Size | 89 MB | 140 MB |
| Requires iOS | 15.1 | **11.0** |
| Devices | **iPhone, iPod** | — |
| Age rating | 4+ | 4+ |
| Developer | [Logaviv](https://appshunter.io/developer/868100254) | [Bayer Group](https://appshunter.io/developer/480186736) |

## What reviewers say

### Opti

[App page](https://appshunter.io/ios/app/opti-a-by-armbruster/id1664088863)

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

**In-app purchases:** none


### 3D Dekalb

[App page](https://appshunter.io/ios/app/3d-dekalb/id6450748527)

**In-app purchases:** none


## Frequently asked questions

### Is Opti free?

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

### Is 3D Dekalb free?

3D Dekalb is free to download, with no in-app purchases.

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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.*