Spine Sonnet vs Prolog Retro Notes
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Spine Sonnet
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.
- Automatic sonnet generation
- Found poetry style
- Archive of 2500+ book titles
- Art and architectural theory focus
- 14-line sonnets
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Spine Sonnet is an automatic poem generator in the tradition of found poetry that randomly composes 14 line sonnets derived from an archive of over 2500 art and architectural theory and criticism book titles.
Prolog Retro Notes
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.
- Retro 8-bit graphics
- Memo recording
- Playtime tracking
- Level-based text progress
- Photo attachment
- Passcode lock (premium)
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_______________________________ Do you like retro graphics? ▼ Yes No _______________________________ For those who answered yes! Annotepad app that incorporates the nostalgic feeling of those days and reproduces the world has been born!! It's an app to remember the excitement of that day when your heart swelled with adventure into an unknown world. Today as well, let's choose a save data and head to the forest of sentences... In this memo app, you can record: - Memos - Playtime (editing time) - Level (varies depending on the amount of text) - Photos Let's level up and create great save data!! We paid special attention to the world view. We hope it can be of some use in your memo life. [Premium Service] ■ Unlocked Features - Hide in-app ads - Record photos - Unlock the record limit - Passcode lock function ■ Duration It will automatically renew every month starting from the application date. It will be charged to your iTunes account. ■ About Automatic Renewal You can stop automatic renewal if it is more than 24 hours before the end of the registration period. Automatic renewal procedures will be conducted from 24 hours before the end of the registration period. ■ Confirmation and Cancellation App Store App -> User icon at the upper right of the ToDay tab -> Subscription You can unsubscribe and set automatic renewal and check the update date here. ■ Notes - Automatic renewal of the premium plan cannot be canceled from within the app. - You will be charged to your iTunes account. - Cancellation for the current month is not accepted. ■ Terms of Use and Privacy Policy We will not provide information that can identify individuals to third parties. We manage personal information with great care and handle it as follows. - Support Correspondence No information that can identify individuals will be sent in support emails. - Details Link https://note.com/kojiro79/n/n7c8899db1c9b ■ Disclaimer We will do our best to support any problems or inconveniences in use, but the developer will not be held responsible for any damages caused by the user through this app. ----- Thank you for reading to the end! All reviews are read by the developer himself, and I always get energy from them. I also think about functions based on what you write in your review, so I would be happy if you could write a review when you have time! We will continue to update the app to make it comfortable for everyone, so please support us!
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Spine Sonnet | Prolog Retro Notes |
|---|---|---|
| Price | Free | Free |
| Rating | 4.2 (6 ratings) | 5.0 (5 ratings) — better |
| Positive reviews | 62.5% of reviews | 100.0% of reviews — better |
| Number of ratings | 6 — better | 5 |
| Update frequency | Every 41 months | Every 9 months — better |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 9.0 — better | 14.0 |
| Further details — not scored | ||
| Size | 6 MB | 38 MB |
| Age rating | 4+ | 4+ |
| Developer | jody zellen | yasuhiro kojima |
Customer experience
Spine Sonnet
Prolog Retro Notes
In-app purchases
Spine Sonnet
No in-app purchases
Prolog Retro Notes
- Premium plan$0.991 Month









