# Prolog Retro Notes vs 8Bit Karate Drum

The clearest difference is in-app purchases: 8Bit Karate Drum at none against Prolog Retro Notes's 1. 8Bit Karate Drum also leads on iOS requirement (10.0 vs 14.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Prolog Retro Notes sells 1 in-app purchase, starting at $0.99 per month. 8Bit Karate Drum asks for nothing beyond the download.

Prolog Retro Notes ships an update every 9 months, 8Bit Karate Drum every 14 months. The most recent releases landed on October 13, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | Prolog Retro Notes | 8Bit Karate Drum |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (5 ratings)](https://appshunter.io/ios/app/prolog-retro-notes-8-bit-memo/id6468677672/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | **Every 9 months** | Every 14 months |
| Monetization | Free with in-app purchases | — |
| Size | 38 MB | 19 MB |
| Requires iOS | 14.0 | **10.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 9+ |
| Developer | [yasuhiro kojima](https://appshunter.io/developer/1244729145) | [Sohei Ukon](https://appshunter.io/developer/1743375592) |

## What reviewers say

### Prolog Retro Notes

[App page](https://appshunter.io/ios/app/prolog-retro-notes-8-bit-memo/id6468677672)

This app offers a unique note-taking experience with a retro 8-bit aesthetic. It allows users to record memos, track editing time, and even attach photos, all within a nostalgic, game-like interface. Level up your notes and enjoy a blast from the past.

**Highlights:** Retro 8-bit graphics, Memo recording, Playtime tracking, Level-based text progress, Photo attachment, Passcode lock (premium)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium plan | $0.99 | per month |


### 8Bit Karate Drum

[App page](https://appshunter.io/ios/app/8bit-karate-drum/id6499421507)

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

**In-app purchases:** none


## Frequently asked questions

### Is Prolog Retro Notes free?

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

### Is 8Bit Karate Drum free?

8Bit Karate Drum is free to download, with no in-app purchases.

### Do Prolog Retro Notes or 8Bit Karate Drum have ads?

Both Prolog Retro Notes and 8Bit Karate Drum show ads.

### Which is updated more often, Prolog Retro Notes or 8Bit Karate Drum?

Prolog Retro Notes ships an update every 9 months, and 8Bit Karate Drum every 14 months. Most recently, Prolog Retro Notes was updated on October 13, 2026 and 8Bit Karate Drum on October 4, 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.*