# Underground vs Skado

The clearest difference is update cadence: Skado at every 9 days against Underground's every 12 months. Underground's advantage is iOS requirement (13.0 vs 15.6). On price, ads, in-app purchases and device support there is nothing between them.

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

Underground ships an update every 12 months, Skado every 9 days. The most recent releases landed on September 27, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Underground | Skado |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 12 months | **Every 9 days** |
| Size | 90 MB | 72 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Coobi s.r.l.s](https://appshunter.io/developer/996574824) | [Angelo Cassano](https://appshunter.io/developer/897714984) |

## What reviewers say

### Underground

[App page](https://appshunter.io/ios/app/underground/id1511976249)

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


### Skado

[App page](https://appshunter.io/ios/app/skado-expiration-tracker/id6743683519)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Underground free?

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

### Is Skado free?

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

### Do Underground or Skado have ads?

Neither Underground nor Skado shows ads.

### Which is updated more often, Underground or Skado?

Underground ships an update every 12 months, and Skado every 9 days. Most recently, Underground was updated on September 27, 2026 and Skado on October 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.*