# Document Signer vs AI Chat Assistant

The clearest difference is ads: Document Signer at none against AI Chat Assistant's shown. Document Signer also leads on review sentiment (75% vs 41%) and rating (4.7 vs 4.3). AI Chat Assistant's advantage is ratings volume (751 vs 26). On price, update cadence, in-app purchases and monetization model there is nothing between them.

Both are free to download. Document Signer sells 4 in-app purchases, starting at $4.99 per 7 days and AI Chat Assistant sells 10 in-app purchases, starting at $6.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Document Signer holds the better App Store score, 4.7 against 4.3. That said, the two scores are not equally well evidenced: AI Chat Assistant has 751 ratings behind it against 26, so its average is the more settled of the two. Written reviews point the same way: 75% of Document Signer's written reviews are positive against 41% of AI Chat Assistant's.

Document Signer ships an update every 9 days, AI Chat Assistant weekly. The most recent releases landed on October 7, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | Document Signer | AI Chat Assistant |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (26 ratings)](https://appshunter.io/ios/app/document-signer-simplesign/id6502412936/reviews)** | [4.3 (751 ratings)](https://appshunter.io/ios/app/ai-chat-assistant-chatone/id6642630027/reviews) |
| Number of ratings | 26 | **751** |
| Positive reviews | **75.0% of reviews** | 40.6% of reviews |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 9 days | **Weekly** |
| Monetization | Freemium | Freemium |
| Size | 47 MB | 56 MB |
| Requires iOS | **15.1** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [Zion Studios LLC](https://appshunter.io/developer/1685918923) | [DeepGronk AI LLC](https://appshunter.io/developer/1660915111) |

## What reviewers say

### Document Signer

[App page](https://appshunter.io/ios/app/document-signer-simplesign/id6502412936)

Easily sign PDFs, fill forms, and manage scanned documents. This app offers a free e-signature feature and a camera scanner. Upgrade to Pro for advanced editing tools, templates, and cloud syncing.

**Highlights:** Electronic document signing, PDF and image file signing, Camera scanner for documents, Document editing tools, Ready-to-use templates, Google Drive syncing, Local storage for privacy

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Weekly Subscription | $4.99 | per 7 days |
| Pro Monthly Subscription | $12.99 | per month |
| Pro Yearly Subscription | $59.99 | per year |
| Lifetime SimpleSign Offer | $69.99 | one-time |


### AI Chat Assistant

[App page](https://appshunter.io/ios/app/ai-chat-assistant-chatone/id6642630027)

This AI companion offers intelligent chat, image generation, and detailed image descriptions. It provides specialized assistants for various tasks and saves conversation history. Start for free and upgrade for advanced AI capabilities.

**Highlights:** AI Chat Assistant, AI Image Generation, Smart Image Descriptions, Specialized AI Assistants, Chat History

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ChatONE AI Pro Subscription | $6.99 | per 7 days |
| ChatONE AI Pro Subscription | $14.99 | per month |
| ChatONE AI Pro Subscription | $19.99 | per 2 months |
| ChatONE AI Pro Subscription | $29.99 | per 6 months |
| ChatONE AI Pro Subscription | $49.99 | per year |
| ChatONE AI Pro Subscription | $54.99 | per year |
| 10k Imagizo Credits | $9.99 | one-time |
| 30k Imagizo Credits | $19.99 | one-time |
| 100k Imagizo Credits | $49.99 | one-time |
| ChatONE AI Lifetime | $199.99 | one-time |

**What reviewers like**

- ✨ Pretty smart AI
- 💡 Useful features
- 🚀 Fast responses
- 👍 Good for brainstorming
- ✍️ Drafts emails quickly

**What reviewers complain about**

- 💸 Expensive subscription
- ❌ Many errors and typos
- 👎 Not worth the money
- 🚫 Limited free usage
- 🤔 Unclear pricing

**Reported bugs**

- Poor spelling and grammar
- Phrases make no sense
- App not working
- Image generation error
- Cannot restore purchase

**Requested features**

- Allow users to use features by watching ads
- Lower subscription price
- Improve voice integration
- Add dark mode option
- Improve UI for different AI models


## Frequently asked questions

### Is Document Signer free?

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

### Is AI Chat Assistant free?

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

### Which has better reviews, Document Signer or AI Chat Assistant?

Document Signer is rated higher. Document Signer averages 4.7 out of 5 from 26 ratings, while AI Chat Assistant averages 4.3 from 751 ratings.

### Do Document Signer or AI Chat Assistant have ads?

AI Chat Assistant shows ads; Document Signer does not.

### Which is updated more often, Document Signer or AI Chat Assistant?

Document Signer ships an update every 9 days, and AI Chat Assistant weekly. Most recently, Document Signer was updated on October 7, 2026 and AI Chat Assistant on October 22, 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.*