# Mailer vs PDF Reader & Document Viewer

The clearest difference is update cadence: PDF Reader & Document Viewer at daily against Mailer's every 3 weeks. Mailer's advantage is iOS requirement (13.0 vs 15.5). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Mailer sells 5 in-app purchases, starting at $3.99 per 7 days and PDF Reader & Document Viewer sells 3 in-app purchases, starting at $5.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Mailer ships an update every 3 weeks, PDF Reader & Document Viewer daily. The most recent releases landed on November 4, 2026 and November 13, 2026 respectively.

## The numbers

| Metric | Mailer | PDF Reader & Document Viewer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (30 ratings)](https://appshunter.io/ios/app/mailer-ai-email-assistant/id6504745156/reviews)** | — |
| Number of ratings | **30** | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Daily** |
| Monetization | Free with in-app purchases | — |
| Size | 127 MB | 44 MB |
| Requires iOS | **13.0** | 15.5 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Lascade](https://appshunter.io/developer/1703521232) | [Mohamed Alaa Zekroum](https://appshunter.io/developer/6821140701) |

## What reviewers say

### Mailer

[App page](https://appshunter.io/ios/app/mailer-ai-email-assistant/id6504745156)

This AI-powered tool simplifies email writing by generating, translating, and optimizing messages. It offers customizable templates and helps users create professional, impactful emails efficiently. Ideal for anyone looking to enhance their email communication.

**Highlights:** AI-powered email generation, Email content optimization, Customizable email templates, Professional email formatting, Language translation for emails

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Offer Price | $3.99 | per 7 days |
| Weekly Subscription | $7.99 | per 7 days |
| Yearly Offer | $24.99 | per year |
| Yearly Subscription | $49.99 | per year |
| Life Time Access | $79.99 | one-time |


### PDF Reader & Document Viewer

[App page](https://appshunter.io/ios/app/pdf-reader-and-document-viewer/id6821140699)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Premium | $5.99 | per 7 days |
| Monthly Premium | $13.99 | per month |
| Yearly Premium | $79.99 | per year |


## Frequently asked questions

### Is Mailer free?

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

### Is PDF Reader & Document Viewer free?

PDF Reader & Document Viewer is free to download, with in-app purchases available.

### Do Mailer or PDF Reader & Document Viewer have ads?

Neither Mailer nor PDF Reader & Document Viewer shows ads.

### Which is updated more often, Mailer or PDF Reader & Document Viewer?

Mailer ships an update every 3 weeks, and PDF Reader & Document Viewer daily. Most recently, Mailer was updated on November 4, 2026 and PDF Reader & Document Viewer on November 13, 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.*