# BBX ECO2 vs QuarkPDF

The clearest difference is update cadence: QuarkPDF at every 4 months against BBX ECO2's every 40 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

BBX ECO2 ships an update every 40 months, QuarkPDF every 4 months. The most recent releases landed on September 30, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | BBX ECO2 | QuarkPDF |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 40 months | **Every 4 months** |
| Size | 11 MB | 39 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [AMI Automation LLC](https://appshunter.io/developer/943514399) | [Beya Network Technology Limited](https://appshunter.io/developer/1702838438) |

## What reviewers say

### BBX ECO2

[App page](https://appshunter.io/ios/app/bbx-eco2/id6444162375)

**Features:** macOS Compatibility

**In-app purchases:** none


### QuarkPDF

[App page](https://appshunter.io/ios/app/quarkpdf/id6742776498)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is BBX ECO2 free?

BBX ECO2 is free to download, with no in-app purchases.

### Is QuarkPDF free?

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

### Do BBX ECO2 or QuarkPDF have ads?

Neither BBX ECO2 nor QuarkPDF shows ads.

### Which is updated more often, BBX ECO2 or QuarkPDF?

BBX ECO2 ships an update every 40 months, and QuarkPDF every 4 months. Most recently, BBX ECO2 was updated on September 30, 2026 and QuarkPDF on October 10, 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.*