Comparison

Spine Sonnet vs Prolog Retro Notes

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • Automatic sonnet generation
  • Found poetry style
  • Archive of 2500+ book titles
  • Art and architectural theory focus
  • 14-line sonnets
Features
Read full description

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.

About

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.

Highlights
  • Retro 8-bit graphics
  • Memo recording
  • Playtime tracking
  • Level-based text progress
  • Photo attachment
  • Passcode lock (premium)
Features
Read full description

_______________________________ 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

Spine Sonnet4 screens
Prolog Retro Notes1 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard7 real differences · 3 level
Spine Sonnet versus Prolog Retro Notes: the parameters behind the verdict, then further details
ParameterSpine SonnetProlog Retro Notes
PriceFreeFree
Rating4.2 (6 ratings)5.0 (5 ratings) — better
Positive reviews62.5% of reviews100.0% of reviews — better
Number of ratings6 — better5
Update frequencyEvery 41 monthsEvery 9 months — better
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS9.0 — better14.0
Further details — not scored
Size6 MB38 MB
Age rating4+4+
Developerjody zellenyasuhiro kojima

Customer experience

Spine Sonnet

All ratings6 ratings
Positive66.7%
Neutral33.3%
Negative0.0%
Written reviews8 reviews
Positive62.5%
Neutral12.5%
Negative25.0%

Prolog Retro Notes

All ratings5 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews4 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Spine Sonnet

No in-app purchases

1 purchases

Prolog Retro Notes

Subscriptions1
  • Premium plan$0.991 Month

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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