# Sign Documents vs Key Library

The clearest difference is iOS requirement: Sign Documents at 16.0 against Key Library's 18.6. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Sign Documents sells 7 in-app purchases, starting at $2.99 per 7 days and Key Library sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | Sign Documents | Key Library |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (23 ratings)](https://appshunter.io/ios/app/sign-documents-signiq/id6748138501/reviews)** | — |
| Number of ratings | **23** | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Monetization | Free with in-app purchases | — |
| Size | 48 MB | 4 MB |
| Requires iOS | **16.0** | 18.6 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Danyil Podziraev](https://appshunter.io/developer/1826997437) | [JOSHUA ADAM PEARCE-GARCIA](https://appshunter.io/developer/6801278941) |

## What reviewers say

### Sign Documents

[App page](https://appshunter.io/ios/app/sign-documents-signiq/id6748138501)

Easily fill, sign, and manage documents digitally. Securely add signatures, initials, and text to PDFs imported from cloud services or your device. Export and share signed documents instantly.

**Highlights:** Securely sign PDFs, Import from cloud/device, Add initials and text, Save and reuse signature, Export and share as PDF

**Features:** macOS Compatibility

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Signature – Sign Documents | $2.99 | per 7 days |
| Signature – Sign Documents | $4.99 | per 7 days |
| Signature – Sign Documents | $6.99 | per 7 days |
| Signature – Sign Documents | $9.99 | per 7 days |
| Signature – Sign Documents | $19.99 | per year |
| Signature – Sign Documents | $29.99 | per year |
| Signature – Sign Documents | $39.99 | per year |


### Key Library

[App page](https://appshunter.io/ios/app/key-library/id6801278939)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Standard | $4.99 | one-time |
| Unlimited | $12.99 | one-time |


## Frequently asked questions

### Is Sign Documents free?

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

### Is Key Library free?

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

### Do Sign Documents or Key Library have ads?

Neither Sign Documents nor Key Library shows ads.

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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.*