# IIT OTP vs Sign Documents

The clearest difference is in-app purchases: IIT OTP at none against Sign Documents's 7. On price and iOS requirement there is nothing between them.

Both are free to download. Sign Documents sells 7 in-app purchases, starting at $2.99 per 7 days. IIT OTP asks for nothing beyond the download.

## The numbers

| Metric | IIT OTP | Sign Documents |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | — | No |
| Update frequency | — | Every 6 days |
| Size | 2 MB | 25 MB |
| Requires iOS | **15.0** | 16.0 |
| Devices | — | **iPhone** |
| Age rating | 4+ | 4+ |
| Developer | [IIT, JSC](https://appshunter.io/developer/1447134477) | [Taras Bublyk](https://appshunter.io/developer/1848178073) |

## What reviewers say

### IIT OTP

[App page](https://appshunter.io/ios/app/iit-otp/id6738125632)

**In-app purchases:** none


### Sign Documents

[App page](https://appshunter.io/ios/app/sign-documents-autosign/id6754394797)

**Features:** macOS Compatibility

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Digital Signature | $2.99 | per 7 days |
| Digital Signature | $4.99 | per 7 days |
| Digital Signature | $6.99 | per 7 days |
| Digital Signature | $9.99 | per 7 days |
| Digital Signature | $19.99 | per year |
| Digital Signature | $29.99 | per year |
| Digital Signature | $34.99 | per year |


## Frequently asked questions

### Is IIT OTP free?

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

### Is Sign Documents free?

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

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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.*