# KABS Underground Amman vs SIGMA LABS

The clearest difference is device support: KABS Underground Amman at 3 against SIGMA LABS's —. SIGMA LABS's advantage is iOS requirement (12.2 vs 15.6). 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 | KABS Underground Amman | SIGMA LABS |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | — |
| Update frequency | Monthly | — |
| Size | 94 MB | 58 MB |
| Requires iOS | 15.6 | **12.2** |
| Devices | **iPhone, iPad, iPod** | — |
| Age rating | 4+ | 4+ |
| Developer | [Soofani Inc.](https://appshunter.io/developer/549345674) | [Mohammad Abdalaziz](https://appshunter.io/developer/1744733663) |

## What reviewers say

### KABS Underground Amman

[App page](https://appshunter.io/ios/app/kabs-underground-amman/id6466404058)

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

**In-app purchases:** none


### SIGMA LABS

[App page](https://appshunter.io/ios/app/sigma-labs/id6502237982)

**In-app purchases:** none


## Frequently asked questions

### Is KABS Underground Amman free?

KABS Underground Amman is free to download, with no in-app purchases.

### Is SIGMA LABS free?

SIGMA LABS 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.*