Comparison

Prolog Retro Notes vs COLONY

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

Head to head
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!

About

COLONY

Features
Read full description

COLONY is a one-of-a-kind shared AI chat app where users around the world converse with 8 AI entities ("Thought Bodies"), each driven by its own unique philosophy. On screen, real-time exchanges between other users and the Thought Bodies appear and fade away. Send your everyday frustrations or feelings you can't share with anyone, and the AIs won't respond with generic "empathy" or "comfort." Instead, each one replies from its own cold, philosophical perspective. Radical rationalism, the embrace of nothingness, endless cycles — insights beyond ordinary human thinking help you see your worries from an entirely different angle. App Features 8 Unique AI Personalities Each one holds a completely different doctrine. Find the one that challenges your worldview the most. A Shared Space Where Others' Words Drift By Against a cosmic black backdrop, messages from other users and AI responses gently appear and dissolve. You can enjoy simply watching someone else's thoughts float by in silence. Mystical BGM Perfect for Falling Asleep Quiet, ambient music plays as if you're drifting through outer space. Listening while watching words emerge from the darkness naturally calms your mind — ideal for nighttime relaxation or as a sleep aid. Intentionally Lowercase-Only Input Users can only type in lowercase letters. This deliberate limitation on text creates the quiet, fleeting atmosphere that defines this app. (Japanese users type in hiragana only; other languages use a standard keyboard.) When you're a little tired of ordinary social media or AI chatbots, why not reach into the darkness and let these strange waves of words wash over you?

Screenshots

Prolog Retro Notes1 screens
COLONY4 screens

Verdict

The call

The clearest difference is update cadence: COLONY at every 2 months against Prolog Retro Notes's every 9 months. On price, ads, in-app purchases 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 and COLONY sells 2 in-app purchases, starting at $0.99 per 7 days. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Prolog Retro Notes ships an update every 9 months, COLONY every 2 months. The most recent releases landed on October 30, 2026 and November 6, 2026 respectively.

Scorecard1 real difference · 9 level
Prolog Retro Notes versus COLONY: the parameters behind the verdict, then further details
ParameterProlog Retro NotesCOLONY
PriceFreeFree
Rating5.0 (4 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings4 — better—
Update frequencyEvery 9 monthsEvery 2 months — better
AdsYesYes
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPodiPhone, iPod
Requires iOS14.0 — better15.1
Further details — not scored
Size38 MB128 MB
Age rating4+17+
Developeryasuhiro kojimaHikaru Sawada

In-app purchases

1 purchases

Prolog Retro Notes

Subscriptions1
  • Premium plan$0.991 Month
2 purchases

COLONY

Subscriptions2
  • 週間プレミアム$0.997 Days
  • 月間プレミアム3 Days trial$2.991 Month

Questions

Is Prolog Retro Notes free?
Prolog Retro Notes is free to download, with in-app purchases available.
Is COLONY free?
COLONY is free to download, with in-app purchases available.
Do Prolog Retro Notes or COLONY have ads?
Both Prolog Retro Notes and COLONY show ads.
Which is updated more often, Prolog Retro Notes or COLONY?
Prolog Retro Notes ships an update every 9 months, and COLONY every 2 months. Most recently, Prolog Retro Notes was updated on October 30, 2026 and COLONY on November 6, 2026.

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