# RAF Aptitude Prep vs Water Hygiene

RAF Aptitude Prep and Water Hygiene are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. RAF Aptitude Prep sells 3 in-app purchases, starting at $4.99 per month and Water Hygiene sells 3 in-app purchases, starting at $4.99 per 7 days. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | RAF Aptitude Prep | Water Hygiene |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Size | 4 MB | 44 MB |
| Requires iOS | 17.0 | **16.4** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [MD Shahariar Nazim Joy](https://appshunter.io/developer/1893961943) | [Hamilton Technologies Ltd](https://appshunter.io/developer/1730911718) |

## What reviewers say

### RAF Aptitude Prep

[App page](https://appshunter.io/ios/app/raf-aptitude-prep/id6792479893)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $4.99 | per month |
| Yearly | $14.99 | per year |
| Lifetime Access | $19.99 | one-time |


### Water Hygiene

[App page](https://appshunter.io/ios/app/water-hygiene-eusr-blue-card/id6813494931)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Access | $4.99 | per 7 days |
| Monthly Access | $9.99 | per month |
| Lifetime Access | $19.99 | one-time |


## Frequently asked questions

### Is RAF Aptitude Prep free?

RAF Aptitude Prep is free to download, with in-app purchases available.

### Is Water Hygiene free?

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

### Do RAF Aptitude Prep or Water Hygiene have ads?

Neither RAF Aptitude Prep nor Water Hygiene 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.*