# KNOCKKNOCK / Retro Notes vs ZenWall

The clearest difference is device support: KNOCKKNOCK / Retro Notes at 3 against ZenWall's 1. On price, ads, in-app purchases and iOS requirement there is nothing between them.

Both are free to download. KNOCKKNOCK / Retro Notes sells 1 one-off in-app purchase and ZenWall sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | KNOCKKNOCK / Retro Notes | ZenWall |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/knockknock-retro-notes/id6754227270/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | — | Fortnightly |
| Monetization | Free with in-app purchases | — |
| Size | 6 MB | 89 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | **iPhone, iPad, Mac** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Yaroslav Samoylov](https://appshunter.io/developer/683107070) | [Piotr Gebski](https://appshunter.io/developer/1860417249) |

## What reviewers say

### KNOCKKNOCK / Retro Notes

[App page](https://appshunter.io/ios/app/knockknock-retro-notes/id6754227270)

This app offers a unique note-taking experience with a retro CRT monitor aesthetic. View two notes simultaneously and interact with a fun, animated fidget element on the side.

**Highlights:** Retro CRT monitor design, Dual note display, Interactive fidget element, Fun and engaging interface

**Features:** Family Sharing, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited Notes | $8.99 | one-time |


### ZenWall

[App page](https://appshunter.io/ios/app/zenwall-deep-focus/id6758081455)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ZenWall Monthly Premium | $4.99 | per month |
| ZenWall Yearly Premium | $39.99 | per year |


## Frequently asked questions

### Is KNOCKKNOCK / Retro Notes free?

KNOCKKNOCK / Retro Notes is free to download, with in-app purchases available.

### Is ZenWall free?

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

### Do KNOCKKNOCK / Retro Notes or ZenWall have ads?

Neither KNOCKKNOCK / Retro Notes nor ZenWall 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.*