# Spine Sonnet vs Prolog Retro Notes

The clearest difference is rating: Prolog Retro Notes at 5.0 against Spine Sonnet's 4.2. Prolog Retro Notes also leads on review sentiment (100% vs 63%) and update cadence (every 9 months vs every 41 months). Spine Sonnet's advantage is in-app purchases (none vs 1) and ads (none vs shown). On price, ratings volume 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. Spine Sonnet asks for nothing beyond the download.

Prolog Retro Notes holds the better App Store score, 5.0 against 4.2. Both are backed by a comparable volume of ratings — 6 and 5 respectively. Written reviews point the same way: 63% of Spine Sonnet's written reviews are positive against 100% of Prolog Retro Notes's.

Spine Sonnet ships an update every 41 months, Prolog Retro Notes every 9 months. The most recent releases landed on September 17, 2026 and June 2, 2026 respectively.

## The numbers

| Metric | Spine Sonnet | Prolog Retro Notes |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.2 (6 ratings)](https://appshunter.io/ios/app/spine-sonnet/id422871445/reviews) | **[5.0 (5 ratings)](https://appshunter.io/ios/app/prolog-retro-notes-8-bit-memo/id6468677672/reviews)** |
| Number of ratings | **6** | 5 |
| Positive reviews | 62.5% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 41 months | **Every 9 months** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 6 MB | 38 MB |
| Requires iOS | **9.0** | 14.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [jody zellen](https://appshunter.io/developer/422871450) | [yasuhiro kojima](https://appshunter.io/developer/1244729145) |

## What reviewers say

### Spine Sonnet

[App page](https://appshunter.io/ios/app/spine-sonnet/id422871445)

This app automatically generates 14-line sonnets using titles from a large archive of art and architectural theory books. It creates unique poems in the style of found poetry.

**Highlights:** Automatic sonnet generation, Found poetry style, Archive of 2500+ book titles, Art and architectural theory focus, 14-line sonnets

**Features:** macOS Compatibility

**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 Spine Sonnet free?

Spine Sonnet 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.

### Which has better reviews, Spine Sonnet or Prolog Retro Notes?

Prolog Retro Notes is rated higher. Spine Sonnet averages 4.2 out of 5 from 6 ratings, while Prolog Retro Notes averages 5.0 from 5 ratings.

### Do Spine Sonnet or Prolog Retro Notes have ads?

Prolog Retro Notes shows ads; Spine Sonnet does not.

### Which is updated more often, Spine Sonnet or Prolog Retro Notes?

Spine Sonnet ships an update every 41 months, and Prolog Retro Notes every 9 months. Most recently, Spine Sonnet was updated on September 17, 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.*