# PDF Converter +. vs CognIX AI

The clearest difference is in-app purchases: CognIX AI at none against PDF Converter +.'s 4. CognIX AI also leads on update cadence (weekly vs monthly). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. PDF Converter +. sells 4 in-app purchases, starting at $4.99 per 7 days. CognIX AI asks for nothing beyond the download.

PDF Converter +. ships an update monthly, CognIX AI weekly. The most recent releases landed on September 30, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | PDF Converter +. | CognIX AI |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Monthly | **Weekly** |
| Size | 48 MB | 74 MB |
| Requires iOS | 17.6 | **17.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 12+ |
| Developer | [Allan Perkins](https://appshunter.io/developer/1825080683) | [CognIXAI Technologies Inc.](https://appshunter.io/developer/6805663042) |

## What reviewers say

### PDF Converter +.

[App page](https://appshunter.io/ios/app/pdf-converter-plus/id6748304530)

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $4.99 | per 7 days |
| Monthly | $12.99 | per month |
| Yearly | $39.99 | per year |
| Lifetime | $59.99 | one-time |


### CognIX AI

[App page](https://appshunter.io/ios/app/cognix-ai/id6805663040)

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

**In-app purchases:** none


## Frequently asked questions

### Is PDF Converter +. free?

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

### Is CognIX AI free?

CognIX AI is free to download, with no in-app purchases.

### Do PDF Converter +. or CognIX AI have ads?

Neither PDF Converter +. nor CognIX AI shows ads.

### Which is updated more often, PDF Converter +. or CognIX AI?

PDF Converter +. ships an update monthly, and CognIX AI weekly. Most recently, PDF Converter +. was updated on September 30, 2026 and CognIX AI on October 24, 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.*