# RD Quantum vs IamWriter

The clearest difference is in-app purchases: RD Quantum at none against IamWriter's 13. IamWriter's advantage is update cadence (every 10 days vs every 5 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. IamWriter sells 13 in-app purchases, starting at $1.69 per 7 days. RD Quantum asks for nothing beyond the download.

RD Quantum ships an update every 5 weeks, IamWriter every 10 days. The most recent releases landed on October 7, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | RD Quantum | IamWriter |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (13 ratings)](https://appshunter.io/ios/app/iamwriter-ai-note-taker/id6477868217/reviews)** |
| Number of ratings | — | **13** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 10 days** |
| Monetization | — | Free with in-app purchases |
| Size | 23 MB | 85 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPod, Mac, Apple Watch** |
| Age rating | 4+ | 12+ |
| Developer | [Stiftelsen Revenue Development](https://appshunter.io/developer/1597478317) | [Exinor Inc.](https://appshunter.io/developer/6811217599) |

## What reviewers say

### RD Quantum

[App page](https://appshunter.io/ios/app/rd-quantum/id1597477895)

**Features:** macOS Compatibility

**In-app purchases:** none


### IamWriter

[App page](https://appshunter.io/ios/app/iamwriter-ai-note-taker/id6477868217)

This AI-powered writing assistant helps improve text quality and efficiency for various tasks. It offers multilingual support, content creation, and tools for grammar checking, summarization, and personalized prompts.

**Highlights:** AI-powered writing improvement, Multilingual text generation and translation, Content creation for social media, emails, and documents, Summarization of text and YouTube videos, Real-time grammar checking and paraphrasing, Customizable prompt generator

**Features:** Family Sharing, Apple Watch app, Vision Pro support

**In-app purchases (13)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $1.69 | per 7 days |
| Weekly | $1.99 | per 7 days |
| Weekly | $2.39 | per 7 days |
| Weekly | $2.69 | per 7 days |
| Weekly Premium | $2.89 | per 7 days |
| Monthly | $4.99 | per month |
| Monthly | $5.99 | per month |
| Monthly | $6.99 | per month |
| Monthly | $7.99 | per month |
| Annual | $33.49 | per year |
| Annual | $40.49 | per year |
| Annual | $46.99 | per year |
| Annual | $53.99 | per year |


## Frequently asked questions

### Is RD Quantum free?

RD Quantum is free to download, with no in-app purchases.

### Is IamWriter free?

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

### Do RD Quantum or IamWriter have ads?

Neither RD Quantum nor IamWriter shows ads.

### Which is updated more often, RD Quantum or IamWriter?

RD Quantum ships an update every 5 weeks, and IamWriter every 10 days. Most recently, RD Quantum was updated on October 7, 2026 and IamWriter on October 10, 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.*