Comparison

こよみのこよみ 2023 vs Polyrhythm

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

Head to head
About

こよみのこよみ 2023

Features
Read full description

2023年のカレンダーです。毎月のカレンダーのイラストが心をなごませます。あわせて、アイコンが点滅して「今日」の日付を知らせます。また、季節の移り変わりをより感じられるように「今日」の旧暦を表示します。そして、二十四節気にあたる日には、その節気にふさわしいイラストがあらわれます。 (「今日」にかかわる機能は2024年の間だけ利用できます。その他の年は、月めくりのイラストをお楽しみください。)

About

Polyrhythm

Create a personalized soundscape for relaxation, sleep, or meditation. Explore a variety of organic and synthesized instruments, ambient background sounds, and AI-generated presets. Customize and save your favorite sound combinations for a tranquil experience.

Highlights
  • Variety of sound presets
  • Organic and synthesized instruments
  • Background ambient sounds
  • AI preset generator
  • Advanced preset customization
  • Create and save custom presets
Features
Read full description

When it's time for rest and relaxation, our app will become your faithful companion. Perfect for use before sleep or during meditation, it can also help soothe your child or yourself. Based on polyrhythmic sound playback, our app promises a deep immersion into the world of sounds and visualizations. Features of our app: - A variety of presets with unique moods; - Various organic and synthesized musical instruments to create the perfect atmosphere; - Background sounds including white noise, bird songs, and ocean waves; - AI preset generator for a continuous flow of inspiration; - Advanced preset customization for precise sound tuning; - Ability to create custom presets and save them to favorites. Discover the world of harmony and tranquility with our unique app - your personal oasis of calm. Also worth reading Privacy Policy: https://sites.google.com/view/castles-trip-privacy-policy. And Terms of use: https://sites.google.com/view/polyrhythm-tos

Screenshots

こよみのこよみ 20231 screens
Polyrhythm4 screens

Verdict

The call

The clearest difference is in-app purchases: こよみのこよみ 2023 at none against Polyrhythm's 3. On price, update cadence, ads 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. Polyrhythm sells 3 in-app purchases, starting at $1.99 per 7 days. こよみのこよみ 2023 asks for nothing beyond the download.

UpkeepUpdate frequency

こよみのこよみ 2023 ships an update monthly, Polyrhythm every 5 weeks. Both last shipped on November 3, 2026.

Scorecard1 real difference · 9 level
こよみのこよみ 2023 versus Polyrhythm: the parameters behind the verdict, then further details
Parameterこよみのこよみ 2023Polyrhythm
PriceFreeFree
Rating—2.1 (9 ratings) — better
Positive reviews—25.0% of reviews
Number of ratings—9 — better
Update frequencyMonthly — betterEvery 5 weeks
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Free with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.012.0
Further details — not scored
Size29 MB131 MB
Age rating4+4+
Developerichiro maetaStanislav Duplinskiy

In-app purchases

None

こよみのこよみ 2023

No in-app purchases

3 purchases

Polyrhythm

Subscriptions3
  • Full access to app functions$1.997 Days
  • Full access to app functions$5.991 Month
  • Full access to app functions3 Days trial$12.993 Months

Questions

Is こよみのこよみ 2023 free?
こよみのこよみ 2023 is free to download, with no in-app purchases.
Is Polyrhythm free?
Polyrhythm is free to download, with in-app purchases available.
Do こよみのこよみ 2023 or Polyrhythm have ads?
Neither こよみのこよみ 2023 nor Polyrhythm shows ads.
Which is updated more often, こよみのこよみ 2023 or Polyrhythm?
こよみのこよみ 2023 ships an update monthly, and Polyrhythm every 5 weeks. Most recently, こよみのこよみ 2023 was updated on November 3, 2026 and Polyrhythm on November 3, 2026.

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