# PrimeThink vs PDF Converter

The clearest difference is in-app purchases: PrimeThink at none against PDF Converter's 2. PrimeThink also leads on ads (none vs shown). PDF Converter's advantage is update cadence (every 4 days vs every 3 weeks) and iOS requirement (13.0 vs 15.0). On price and device support there is nothing between them.

Both are free to download. PDF Converter sells 2 in-app purchases, starting at $5.99 per 7 days. PrimeThink asks for nothing beyond the download.

PrimeThink ships an update every 3 weeks, PDF Converter every 4 days. Both last shipped on October 28, 2026.

## The numbers

| Metric | PrimeThink | PDF Converter |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 3 weeks | **Every 4 days** |
| Size | 67 MB | 109 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Novaware Ltd](https://appshunter.io/developer/1502285848) | [Hussain Munir](https://appshunter.io/developer/1585169498) |

## What reviewers say

### PrimeThink

[App page](https://appshunter.io/ios/app/primethink/id6744278915)

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

**In-app purchases:** none


### PDF Converter

[App page](https://appshunter.io/ios/app/pdf-converter-pdf-scanner/id6756782393)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $5.99 | per 7 days |
| Premium | $11.99 | per month |


## Frequently asked questions

### Is PrimeThink free?

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

### Is PDF Converter free?

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

### Do PrimeThink or PDF Converter have ads?

PDF Converter shows ads; PrimeThink does not.

### Which is updated more often, PrimeThink or PDF Converter?

PrimeThink ships an update every 3 weeks, and PDF Converter every 4 days. Most recently, PrimeThink was updated on October 28, 2026 and PDF Converter on October 28, 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.*