# PDF AI vs Write This

The clearest difference is rating: Write This at 4.6 against PDF AI's 1.0. Write This also leads on update cadence (weekly vs every 7 months) and ratings volume (2.6K vs 1). PDF AI's advantage is monetization model (free with in-app purchases vs subscription) and device support (5 vs 3). On price, ads, in-app purchases and iOS requirement there is nothing between them.

Both are free to download. PDF AI sells 3 in-app purchases, starting at $7.99 per 7 days and Write This sells 4 in-app purchases, starting at $4.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Write This holds the better App Store score, 4.6 against 1.0. That said, the two scores are not equally well evidenced: Write This has 2.6K ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 50% of PDF AI's written reviews are positive against 64% of Write This's.

PDF AI ships an update every 7 months, Write This weekly. The most recent releases landed on October 22, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | PDF AI | Write This |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/pdf-ai-chat-with-pdf-and-docs/id1673142550/reviews) | **[4.6 (2.6K ratings)](https://appshunter.io/ios/app/write-this-ai-text-generator/id6444346785/reviews)** |
| Number of ratings | 1 | **2.6K** |
| Positive reviews | 50.0% of reviews | **63.9% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 7 months | **Weekly** |
| Monetization | **Free with in-app purchases** | Subscription |
| Size | 49 MB | 11 MB |
| Requires iOS | **14.0** | 15.4 |
| Devices | **iPhone, iPad, iPod, Mac, Vision Pro** | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Aryan Chaurasia](https://appshunter.io/developer/1607882889) | [Wordless LLC](https://appshunter.io/developer/1610387195) |

## What reviewers say

### PDF AI

[App page](https://appshunter.io/ios/app/pdf-ai-chat-with-pdf-and-docs/id1673142550)

Instantly get answers from any PDF or research paper using natural language. Simply chat with your documents to understand complex topics, get summaries, and extract key findings. Save time and effort on your research.

**Highlights:** Chat with any PDF, Instant answers via NLP, Summarize main points, Extract key findings, User-friendly interface, Save time and effort

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PDF AI : Chat With Any Paper | $7.99 | per 7 days |
| PDF AI : Chat With Any Paper | $15.00 | per month |
| PDF AI : Chat With Any Paper | $99.99 | per year |


### Write This

[App page](https://appshunter.io/ios/app/write-this-ai-text-generator/id6444346785)

This AI-powered writing assistant helps generate text completions based on your prompts. It offers suggestions for ideas and topics, making it ideal for homework assignments or overcoming writer's block. Choose from templates or start fresh and let the app create your content.

**Highlights:** AI text generation, Prompt-based completions, Idea and topic suggestions, Template-based writing, Homework assistance

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Write This | $4.99 | per 7 days |
| Write This Pro | $14.99 | per year |
| Write This Pro \| Tier 1 | $29.99 | per year |
| WriteThis Unlimited Messaging | $59.99 | per year |

**What reviewers like**

- 🚀 Generating ideas
- 👍 Precise and unique information
- 👍 Helpful for writing and structuring thoughts
- 👍 Intuitive and user-friendly
- 👍 Versatile and powerful

**What reviewers complain about**

- 🐛 Buggy and unstable
- 🔒 Lack of customer support
- 💰 Expensive subscription
- 🔍 Limited functionality without subscription
- 🕰️ Inaccurate date information

**Reported bugs**

- Subscription issues and inability to cancel
- Inconsistent and unreliable responses
- Inability to copy and paste content
- Incorrect date and time information

**Requested features**

- Allow saving and exporting chat history
- Integrate with other platforms and data sources
- Provide a free trial or freemium version
- Improve stability and reduce crashes


## Frequently asked questions

### Is PDF AI free?

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

### Is Write This free?

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

### Which has better reviews, PDF AI or Write This?

Write This is rated higher. PDF AI averages 1.0 out of 5 from 1 ratings, while Write This averages 4.6 from 2.6K ratings.

### Do PDF AI or Write This have ads?

Neither PDF AI nor Write This shows ads.

### Which is updated more often, PDF AI or Write This?

PDF AI ships an update every 7 months, and Write This weekly. Most recently, PDF AI was updated on October 22, 2026 and Write This on October 25, 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.*