# ILD Patterns vs PreOp

The clearest difference is iOS requirement: PreOp at 16.4 against ILD Patterns's 26.0. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. ILD Patterns sells 2 in-app purchases, starting at $6.99 per month and PreOp sells 2 in-app purchases, starting at $2.49 per month. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | ILD Patterns | PreOp |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | — | Every 9 days |
| Size | 5 MB | 52 MB |
| Requires iOS | 26.0 | **16.4** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 17+ | 17+ |
| Developer | [ABHISHEK KUMAR](https://appshunter.io/developer/1877547879) | [Bayan AI Technologies](https://appshunter.io/developer/6789968251) |

## What reviewers say

### ILD Patterns

[App page](https://appshunter.io/ios/app/ild-patterns/id6780216546)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ILD Patterns | $6.99 | per month |
| ILD Pattern Premium | $69.99 | per year |


### PreOp

[App page](https://appshunter.io/ios/app/preop-perioperative-medicine/id6789968249)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $2.49 | per month |
| PreOp Premium | $29.00 | per year |


## Frequently asked questions

### Is ILD Patterns free?

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

### Is PreOp free?

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

### Do ILD Patterns or PreOp have ads?

Neither ILD Patterns nor PreOp shows ads.

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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.*