# Write a letter vs OneAGI

The clearest difference is price: Write a letter at Free against OneAGI's $19.99. OneAGI's advantage is review sentiment (70% vs 27%) and rating (4.7 vs 4.0). On ratings volume, ads and device support there is nothing between them.

Write a letter is free to download; OneAGI costs $19.99 up front. Write a letter sells 3 in-app purchases, starting at $2.99 per month. OneAGI asks for nothing beyond the download.

OneAGI holds the better App Store score, 4.7 against 4.0. Both are backed by a comparable volume of ratings — 29 and 21 respectively. Written reviews point the same way: 27% of Write a letter's written reviews are positive against 70% of OneAGI's.

Write a letter ships an update every 3 months, OneAGI every 2 weeks. The most recent releases landed on October 26, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Write a letter | OneAGI |
| --- | --- | --- |
| Price | **Free** | $19.99 |
| Rating | [4.0 (29 ratings)](https://appshunter.io/ios/app/write-a-letter/id912523076/reviews) | **[4.7 (21 ratings)](https://appshunter.io/ios/app/oneagi-agi-for-everyone/id6740195165/reviews)** |
| Number of ratings | **29** | 21 |
| Positive reviews | 27.4% of reviews | **70.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 weeks** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 40 MB | 177 MB |
| Requires iOS | 26.0 | **16.4** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [Jan-Hendrik Damerau](https://appshunter.io/developer/725299865) | [ESOTECH Ltd](https://appshunter.io/developer/1777749632) |

## What reviewers say

### Write a letter

[App page](https://appshunter.io/ios/app/write-a-letter/id912523076)

Create professional letters quickly and easily. Save them as PDFs for emailing, printing, or sharing. Customize your letters with formatting, templates, and fonts to match your style.

**Highlights:** Professional letter creation, PDF export, Email, print, and share options, Customizable templates, Text formatting, Signature integration, Sender address management

**Features:** Family Sharing, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Premium | $2.99 | per month |
| Annual Premium | $22.99 | per year |
| Lifetime Premium | $39.99 | one-time |


### OneAGI

[App page](https://appshunter.io/ios/app/oneagi-agi-for-everyone/id6740195165)

This app offers a unified AI experience, combining local and cloud-based artificial intelligence. It provides tools for productivity, learning, creation, and daily tasks, with options for offline privacy and advanced developer features.

**Highlights:** Local AI (Offline LLMs), Cloud AI (Multiple Models), AI Tools for Productivity, AI Tools for Learning, AI Tools for Creation, AI Control Center (OpenClaw), Developer Tools

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

**In-app purchases:** none


## Frequently asked questions

### Is Write a letter free?

Write a letter is free to download, with in-app purchases available.

### Is OneAGI free?

OneAGI costs $19.99, with no in-app purchases.

### Which has better reviews, Write a letter or OneAGI?

OneAGI is rated higher. Write a letter averages 4.0 out of 5 from 29 ratings, while OneAGI averages 4.7 from 21 ratings.

### Do Write a letter or OneAGI have ads?

Neither Write a letter nor OneAGI shows ads.

### Which is updated more often, Write a letter or OneAGI?

Write a letter ships an update every 3 months, and OneAGI every 2 weeks. Most recently, Write a letter was updated on October 26, 2026 and OneAGI on October 28, 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.*