# ZPA App vs HYGIENE_digital

The clearest difference is in-app purchases: HYGIENE_digital at none against ZPA App's 42. HYGIENE_digital also leads on update cadence (every 6 months vs every 23 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. ZPA App sells 42 one-off in-app purchases. HYGIENE_digital asks for nothing beyond the download.

ZPA App ships an update every 23 months, HYGIENE_digital every 6 months. The most recent releases landed on October 29, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | ZPA App | HYGIENE_digital |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 23 months | **Every 6 months** |
| Monetization | Subscription | — |
| Size | 161 MB | 183 MB |
| Requires iOS | 14.0 | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Dr. R. Kaden Verlag GmbH & Co. KG](https://appshunter.io/developer/787059978) | [mhp Verlag GmbH](https://appshunter.io/developer/1272273050) |

## What reviewers say

### ZPA App

[App page](https://appshunter.io/ios/app/zpa-app/id1273131865)

This app provides ophthalmologists with a leading continuing education journal. It features comprehensive reviews on current diagnostic and therapeutic topics, CME credits, congress reports, and international literature summaries. Published 11 times annually, it keeps eye care professionals updated.

**Highlights:** Comprehensive review articles, CME continuing education credits, Congress reports, International literature summaries, News from ophthalmology, Digital journal access

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

**In-app purchases (42)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ZPA 1/2023 | $9.99 | one-time |
| ZPA 2/2023 | $9.99 | one-time |
| ZPA 3/2023 | $9.99 | one-time |
| ZPA 4/2023 | $9.99 | one-time |
| ZPA 5/2023 | $9.99 | one-time |
| ZPA 6/2023 | $9.99 | one-time |
| ZPA 7+8/2023 | $9.99 | one-time |
| ZPA 9/2023 | $9.99 | one-time |
| ZPA 10/2023 | $9.99 | one-time |
| ZPA 11/2023 | $9.99 | one-time |
| ZPA 12/2023 | $9.99 | one-time |
| ZPA 1/2024 | $9.99 | one-time |
| ZPA 2/2024 | $9.99 | one-time |
| ZPA 3/2024 | $9.99 | one-time |
| ZPA 4/2024 | $9.99 | one-time |
| ZPA 5/2024 | $9.99 | one-time |
| ZPA 7+8/2026 | $9.99 | one-time |
| ZPA 9/2026 | $9.99 | one-time |
| ZPA 10/2026 | $9.99 | one-time |
| ZPA 4/2026 | $9.99 | one-time |
| ZPA 5/2026 | $9.99 | one-time |
| ZPA 6/2026 | $9.99 | one-time |
| ZPA 1/2026 | $9.99 | one-time |
| ZPA 2/2026 | $9.99 | one-time |
| ZPA 3/2026 | $9.99 | one-time |
| ZPA 11/2025 | $9.99 | one-time |
| ZPA 12/2025 | $9.99 | one-time |
| ZPA 10/2025 | $9.99 | one-time |
| ZPA 9/2025 | $9.99 | one-time |
| ZPA 7+8/2025 | $9.99 | one-time |
| ZPA 6/2025 | $9.99 | one-time |
| ZPA 5/2025 | $9.99 | one-time |
| ZPA 4/2025 | $9.99 | one-time |
| ZPA 3/2025 | $9.99 | one-time |
| ZPA 2/2025 | $9.99 | one-time |
| ZPA 1/2025 | $9.99 | one-time |
| ZPA 12/2024 | $9.99 | one-time |
| ZPA 11/2024 | $9.99 | one-time |
| ZPA 10/2024 | $9.99 | one-time |
| ZPA 9/2024 | $9.99 | one-time |
| ZPA 7+8/2024 | $9.99 | one-time |
| ZPA 6/2024 | $9.99 | one-time |


### HYGIENE_digital

[App page](https://appshunter.io/ios/app/hygiene-digital/id6738697739)

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

**In-app purchases:** none


## Frequently asked questions

### Is ZPA App free?

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

### Is HYGIENE_digital free?

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

### Do ZPA App or HYGIENE_digital have ads?

Neither ZPA App nor HYGIENE_digital shows ads.

### Which is updated more often, ZPA App or HYGIENE_digital?

ZPA App ships an update every 23 months, and HYGIENE_digital every 6 months. Most recently, ZPA App was updated on October 29, 2026 and HYGIENE_digital on October 27, 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.*