# SIGFU vs Clock Scan

The clearest difference is update cadence: Clock Scan at every 3 weeks against SIGFU's every 6 weeks. SIGFU'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.

SIGFU ships an update every 6 weeks, Clock Scan every 3 weeks. The most recent releases landed on October 12, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | SIGFU | Clock Scan |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 3 weeks** |
| Size | 126 MB | 43 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [MINISTERE DE LA CONSTRUCTION, DU LOGEMENT ET DE L'URBANISME](https://appshunter.io/developer/1662480972) | [Helmut KLOMANYI](https://appshunter.io/developer/1804321843) |

## What reviewers say

### SIGFU

[App page](https://appshunter.io/ios/app/sigfu/id1662480970)

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

**In-app purchases:** none


### Clock Scan

[App page](https://appshunter.io/ios/app/clock-scan/id6747992254)

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

**In-app purchases:** none


## Frequently asked questions

### Is SIGFU free?

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

### Is Clock Scan free?

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

### Do SIGFU or Clock Scan have ads?

Neither SIGFU nor Clock Scan shows ads.

### Which is updated more often, SIGFU or Clock Scan?

SIGFU ships an update every 6 weeks, and Clock Scan every 3 weeks. Most recently, SIGFU was updated on October 12, 2026 and Clock Scan on September 22, 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.*