# Prolog Retro Notes vs AIChat無制限

The clearest difference is update cadence: AIChat無制限 at every 4 months against Prolog Retro Notes's every 9 months. Prolog Retro Notes's advantage is iOS requirement (14.0 vs 16.0). On price, ads, in-app purchases 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 and AIChat無制限 sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Prolog Retro Notes ships an update every 9 months, AIChat無制限 every 4 months. The most recent releases landed on October 13, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | Prolog Retro Notes | AIChat無制限 |
| --- | --- | --- |
| 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 | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 9 months | **Every 4 months** |
| Monetization | Free with in-app purchases | — |
| Size | 38 MB | 27 MB |
| Requires iOS | **14.0** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [yasuhiro kojima](https://appshunter.io/developer/1244729145) | [YUKI WATANABE](https://appshunter.io/developer/1724288537) |

## 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 |


### AIChat無制限

[App page](https://appshunter.io/ios/app/aichat/id6740727840)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| トークン追加 | $0.49 | one-time |
| 広告非表示 | $1.99 | one-time |


## Frequently asked questions

### Is Prolog Retro Notes free?

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

### Is AIChat無制限 free?

AIChat無制限 is free to download, with in-app purchases available.

### Do Prolog Retro Notes or AIChat無制限 have ads?

Both Prolog Retro Notes and AIChat無制限 show ads.

### Which is updated more often, Prolog Retro Notes or AIChat無制限?

Prolog Retro Notes ships an update every 9 months, and AIChat無制限 every 4 months. Most recently, Prolog Retro Notes was updated on October 13, 2026 and AIChat無制限 on September 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.*