# EXTRA Signer vs PrebuiltML Hub

The clearest difference is update cadence: PrebuiltML Hub at every 3 months against EXTRA Signer's every 7 months. 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.

EXTRA Signer ships an update every 7 months, PrebuiltML Hub every 3 months. The most recent releases landed on October 10, 2026 and September 12, 2026 respectively.

## The numbers

| Metric | EXTRA Signer | PrebuiltML Hub |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 3 months** |
| Size | 4 MB | 20 MB |
| Requires iOS | 16.0 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Extra Trax LLC](https://appshunter.io/developer/588450368) | [PrebuiltML](https://appshunter.io/developer/1494032292) |

## What reviewers say

### EXTRA Signer

[App page](https://appshunter.io/ios/app/extra-signer/id1240871009)

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

**In-app purchases:** none


### PrebuiltML Hub

[App page](https://appshunter.io/ios/app/prebuiltml-hub/id1494032293)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is EXTRA Signer free?

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

### Is PrebuiltML Hub free?

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

### Do EXTRA Signer or PrebuiltML Hub have ads?

Neither EXTRA Signer nor PrebuiltML Hub shows ads.

### Which is updated more often, EXTRA Signer or PrebuiltML Hub?

EXTRA Signer ships an update every 7 months, and PrebuiltML Hub every 3 months. Most recently, EXTRA Signer was updated on October 10, 2026 and PrebuiltML Hub on September 12, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*