# AI Chat PDF vs Sigmy

AI Chat PDF and Sigmy are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. AI Chat PDF sells 4 in-app purchases, starting at $8.99 per 7 days and Sigmy sells 3 in-app purchases, starting at $5.99 per month. Whichever you choose, the download price is not the number that matters.

Both ship on a similar rhythm, roughly every 2 weeks. The most recent releases landed on November 4, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | AI Chat PDF | Sigmy |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 weeks | Every 2 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 12 MB | 3.2 GB |
| Requires iOS | 17.2 | **17.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [OFFIWIZ, S.L.](https://appshunter.io/developer/1386038136) | [SIGMY GROUP PTY LTD](https://appshunter.io/developer/1894404124) |

## What reviewers say

### AI Chat PDF

[App page](https://appshunter.io/ios/app/ai-chat-pdf-office-docs-bot/id6636539247)

This app uses AI assistants to help you work with documents, generate summaries, translate text, and even create images. It simplifies workflows for professionals and students by centralizing tasks and optimizing time management.

**Highlights:** Create personalized AI assistants, Chat with documents for information access, Generate document summaries, Translate documents and texts, Create AI-generated images, Convert files between formats, Analyze Excel tables and generate reports, Extract text from images

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| One week Subscription | $8.99 | per 7 days |
| One week Subscription | $8.99 | per 7 days |
| One year subscription | $89.99 | per year |
| One week Subscription | $89.99 | per year |


### Sigmy

[App page](https://appshunter.io/ios/app/sigmy/id6762498646)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $5.99 | per month |
| Pro Yearly | $39.99 | per year |
| Lifetime Pro | $79.99 | one-time |


## Frequently asked questions

### Is AI Chat PDF free?

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

### Is Sigmy free?

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

### Do AI Chat PDF or Sigmy have ads?

Neither AI Chat PDF nor Sigmy shows ads.

### Which is updated more often, AI Chat PDF or Sigmy?

AI Chat PDF ships an update every 2 weeks, and Sigmy every 2 weeks. Most recently, AI Chat PDF was updated on November 4, 2026 and Sigmy on October 31, 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.*