# Sign documents Fast & Secure vs KarHub

The clearest difference is iOS requirement: Sign documents Fast & Secure at 15.6 against KarHub's 18.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Sign documents Fast & Secure sells 2 in-app purchases, starting at $5.99 per 7 days and KarHub sells 2 in-app purchases, starting at $7.99 per month. Whichever you choose, the download price is not the number that matters.

Both ship on a similar rhythm, roughly monthly. The most recent releases landed on October 19, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | Sign documents Fast & Secure | KarHub |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Monthly | Monthly |
| Size | 28 MB | 6 MB |
| Requires iOS | **15.6** | 18.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [UPPER UNIT Korlatolt Felelossegu Tarsasag](https://appshunter.io/developer/1896555201) | [Challa Hadley](https://appshunter.io/developer/1817713037) |

## What reviewers say

### Sign documents Fast & Secure

[App page](https://appshunter.io/ios/app/sign-documents-fast-and-secure/id6768265137)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock full access | $5.99 | per 7 days |
| Fast & Secure Sign Pro | $5.99 | per 7 days |


### KarHub

[App page](https://appshunter.io/ios/app/karhub/id6799822483)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| KarHub Plus Monthly | $7.99 | per month |
| KarHub Plus Annual | $59.99 | per year |


## Frequently asked questions

### Is Sign documents Fast & Secure free?

Sign documents Fast & Secure is free to download, with in-app purchases available.

### Is KarHub free?

KarHub is free to download, with in-app purchases available.

### Do Sign documents Fast & Secure or KarHub have ads?

Neither Sign documents Fast & Secure nor KarHub shows ads.

### Which is updated more often, Sign documents Fast & Secure or KarHub?

Sign documents Fast & Secure ships an update monthly, and KarHub monthly. Most recently, Sign documents Fast & Secure was updated on October 19, 2026 and KarHub on October 20, 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.*