# Million Billion Conversion vs ZapPDF

The clearest difference is in-app purchases: Million Billion Conversion at none against ZapPDF's 2. Million Billion Conversion also leads on iOS requirement (10.0 vs 17.0). ZapPDF's advantage is update cadence (every 2 months vs every 46 months). On price, ads and device support there is nothing between them.

Both are free to download. ZapPDF sells 2 in-app purchases, starting at $8.99 per year. Million Billion Conversion asks for nothing beyond the download.

Million Billion Conversion ships an update every 46 months, ZapPDF every 2 months. The most recent releases landed on October 14, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Million Billion Conversion | ZapPDF |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 46 months | **Every 2 months** |
| Size | 26 MB | 12 MB |
| Requires iOS | **10.0** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Ahmad Sattar](https://appshunter.io/developer/1458483953) | [Yasar Berker Gungor](https://appshunter.io/developer/1809846909) |

## What reviewers say

### Million Billion Conversion

[App page](https://appshunter.io/ios/app/million-billion-conversion/id1614807408)

**Features:** macOS Compatibility

**In-app purchases:** none


### ZapPDF

[App page](https://appshunter.io/ios/app/zappdf-merge-split-and-edit/id6759740507)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ZapPDF Pro Annual | $8.99 | per year |
| Lifetime Pro Unlock | $14.99 | one-time |


## Frequently asked questions

### Is Million Billion Conversion free?

Million Billion Conversion is free to download, with no in-app purchases.

### Is ZapPDF free?

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

### Do Million Billion Conversion or ZapPDF have ads?

Neither Million Billion Conversion nor ZapPDF shows ads.

### Which is updated more often, Million Billion Conversion or ZapPDF?

Million Billion Conversion ships an update every 46 months, and ZapPDF every 2 months. Most recently, Million Billion Conversion was updated on October 14, 2026 and ZapPDF on October 7, 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.*