# Engine vs PregnaScan

The clearest difference is ads: PregnaScan at none against Engine's shown. Engine's advantage is update cadence (every 10 days vs monthly). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Engine sells 2 in-app purchases, starting at $9.99 per month and PregnaScan sells 3 in-app purchases, starting at $4.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Engine ships an update every 10 days, PregnaScan monthly. The most recent releases landed on October 28, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Engine | PregnaScan |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 10 days** | Monthly |
| Size | 54 MB | 58 MB |
| Requires iOS | 15.1 | 15.1 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Les Nants](https://appshunter.io/developer/1807100390) | [PregnaScan Inc.](https://appshunter.io/developer/6785033448) |

## What reviewers say

### Engine

[App page](https://appshunter.io/ios/app/engine-boost-your-vo2max/id6756730497)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Plan | $9.99 | per month |
| Yearly Plan | $39.99 | per year |


### PregnaScan

[App page](https://appshunter.io/ios/app/pregnascan/id6785033446)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $4.99 | per 7 days |
| Monthly | $12.99 | per month |
| Lifetime | $79.99 | one-time |


## Frequently asked questions

### Is Engine free?

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

### Is PregnaScan free?

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

### Do Engine or PregnaScan have ads?

Engine shows ads; PregnaScan does not.

### Which is updated more often, Engine or PregnaScan?

Engine ships an update every 10 days, and PregnaScan monthly. Most recently, Engine was updated on October 28, 2026 and PregnaScan 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.*