PDF AI vs Write This
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
PDF AI
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.
- Chat with any PDF
- Instant answers via NLP
- Summarize main points
- Extract key findings
- User-friendly interface
- Save time and effort
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Introducing "PDF AI," the ultimate tool for all your research needs! With this app, you can upload any research paper or PDF and get instant answers to all your questions using natural language processing (NLP). With PDF AI, you'll never have to struggle to understand complex research papers again. You can simply chat with the pdf, ask questions about the topics covered, and get a summary of the main points and key findings of the study. Whether you're a student, researcher, or just someone who wants to stay informed, PDF AI is the perfect app for you to chat with any pdf. It's user-friendly and designed to help you save time and effort. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://github.com/Writer-Sonic/Explain-paper-ai/blob/main/README.md#explain-paper
Write This
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.
- AI text generation
- Prompt-based completions
- Idea and topic suggestions
- Template-based writing
- Homework assistance
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Write This is an A.I. writing assistant. APIs to provide text completions given your prompts. Write This not only helps with your writing by utilizing chat, but it also suggests ideas and topics for you. Whether you're stuck on a homework assignment or just need some extra help getting your thoughts down on paper, chat ai is for you! Choose one of the many chat ai templates or start from a new task. Press Play and watch the app make the magic happen! Text is generated free on the fly to complete your sentences for you! FREE your inner chat creativity! - Choose from a selection of templates or start from a new task - Watch the magic happen as your text is generated for you - Get suggestions for ideas and topics - Get extra help with your writing assignments Write This requires a subscription to use. Payment will be charged to the account associated with your Apple ID when you confirm your purchase. Your subscription will automatically renew unless you cancel at least 24 hours before the end of the current period. If you don’t cancel within that time, your account will be charged for renewal. You can manage your subscription by going to your account settings in the App Store after purchase. Privacy Policy: https://www.termsfeed.com/live/3c2ab964-94d4-44d6-8d67-5b5d2ae8c35d Terms: https://www.termsfeed.com/live/96395866-0a6a-48da-a6b2-438de26c2c65 Standard EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | PDF AI | Write This |
|---|---|---|
| Price | Free | Free |
| Rating | 1.0 (1 ratings) | 4.6 (2.6K ratings) — better |
| Positive reviews | 50.0% of reviews | 63.9% of reviews — better |
| Number of ratings | 1 | 2.6K — better |
| Update frequency | Every 7 months | Weekly — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases — better | Subscription |
| Devices | iPhone, iPad, iPod, Mac, Vision Pro — better | iPhone, iPad, iPod |
| Requires iOS | 14.0 — better | 15.4 |
| Further details — not scored | ||
| Size | 49 MB | 11 MB |
| Age rating | 4+ | 12+ |
| Developer | Aryan Chaurasia | Wordless LLC |
Customer experience
PDF AI
Write This
Bugs and requests
PDF AI
Not enough reviews yet to summarise bugs or requests.
Write This
Reported bugs
4 issues- Subscription issues and inability to cancel
- Inconsistent and unreliable responses
- Inability to copy and paste content
- Incorrect date and time information
Requested features
4 requests- 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
In-app purchases
PDF AI
- PDF AI : Chat With Any Paper3 Days trial$7.997 Days
- PDF AI : Chat With Any Paper3 Days trial$15.001 Month
- PDF AI : Chat With Any Paper3 Days trial$99.991 Year
Write This
- Write This$4.997 Days
- Write This Pro$14.991 Year
- Write This Pro | Tier 1$29.991 Year
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- WriteThis Unlimited Messaging$59.991 Year
