# CHALK ビジネス専用チャット vs Prolog Retro Notes

The clearest difference is in-app purchases: CHALK ビジネス専用チャット at none against Prolog Retro Notes's 1. CHALK ビジネス専用チャット also leads on ads (none vs shown) and update cadence (every 5 weeks vs every 9 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Prolog Retro Notes sells 1 in-app purchase, starting at $0.99 per month. CHALK ビジネス専用チャット asks for nothing beyond the download.

CHALK ビジネス専用チャット ships an update every 5 weeks, Prolog Retro Notes every 9 months. The most recent releases landed on May 18, 2026 and June 2, 2026 respectively.

## The numbers

| Metric | CHALK ビジネス専用チャット | Prolog Retro Notes |
| --- | --- | --- |
| 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 | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 5 weeks** | Every 9 months |
| Monetization | — | Free with in-app purchases |
| Size | 45 MB | 38 MB |
| Requires iOS | **13.0** | 14.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Kweather Japan Co.,Ltd.](https://appshunter.io/developer/418296281) | [yasuhiro kojima](https://appshunter.io/developer/1244729145) |

## What reviewers say

### CHALK ビジネス専用チャット

[App page](https://appshunter.io/ios/app/chalk/id917242426)

**Features:** macOS Compatibility, Siri integration

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is CHALK ビジネス専用チャット free?

CHALK ビジネス専用チャット is free to download, with no in-app purchases.

### Is Prolog Retro Notes free?

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

### Do CHALK ビジネス専用チャット or Prolog Retro Notes have ads?

Prolog Retro Notes shows ads; CHALK ビジネス専用チャット does not.

### Which is updated more often, CHALK ビジネス専用チャット or Prolog Retro Notes?

CHALK ビジネス専用チャット ships an update every 5 weeks, and Prolog Retro Notes every 9 months. Most recently, CHALK ビジネス専用チャット was updated on May 18, 2026 and Prolog Retro Notes on June 2, 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.*