# MessagesAI vs MyPDFSign

The clearest difference is ads: MyPDFSign at none against MessagesAI's shown. MessagesAI's advantage is update cadence (every 3 days vs monthly). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. MessagesAI sells 3 one-off in-app purchases and MyPDFSign sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

MessagesAI ships an update every 3 days, MyPDFSign monthly. The most recent releases landed on May 17, 2026 and September 2, 2026 respectively.

## The numbers

| Metric | MessagesAI | MyPDFSign |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/mypdfsign/id6762978607/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 3 days** | Monthly |
| Monetization | — | Free with in-app purchases |
| Size | 7 MB | 3 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Juan Miguel Marques Morilla](https://appshunter.io/developer/858465051) | [ScanPDF – All-in-One PDF Tool](https://appshunter.io/developer/1883137463) |

## What reviewers say

### MessagesAI

[App page](https://appshunter.io/ios/app/messagesai-text-generator/id6746381907)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 5 Credits | $0.99 | one-time |
| 10 Credits | $2.99 | one-time |
| 20 Credits | $4.99 | one-time |


### MyPDFSign

[App page](https://appshunter.io/ios/app/mypdfsign/id6762978607)

Easily sign PDF documents with a clean and intuitive interface. This tool allows for quick signature application on forms, contracts, and business documents, with secure on-device processing and high-quality export.

**Highlights:** Sign PDF files quickly, Add signatures anytime, anywhere, Clean and easy-to-use interface, High-quality PDF export, Secure on-device processing, Works for forms and contracts

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime Premium | $9.99 | one-time |


## Frequently asked questions

### Is MessagesAI free?

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

### Is MyPDFSign free?

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

### Do MessagesAI or MyPDFSign have ads?

MessagesAI shows ads; MyPDFSign does not.

### Which is updated more often, MessagesAI or MyPDFSign?

MessagesAI ships an update every 3 days, and MyPDFSign monthly. Most recently, MessagesAI was updated on May 17, 2026 and MyPDFSign on September 2, 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.*