Comparison

マイメダカ日記 vs JoyFish

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

Head to head
About

マイメダカ日記

Features
Read full description

「マイメダカ日記」は、メダカの飼育日記を簡単に書いて公開できるWebサービスです。「メダカのおうち」で提供しているもので、簡単に日記を書いて公開できます。「マイメダカ日記」アプリは、スマートフォンでより簡単にサービスを利用できるようになっています。日記を書こうと思ったその時に、簡単に投稿できます。

About

JoyFish

Features
Read full description

The JoyFish (You are not a fish, how can you know the joy of fish?) is an iOS app designed specifically for aquarium enthusiasts, aimed at helping users record and track the growth and daily activities of their beloved fish. With this app, you can easily manage feeding and health screenings for your fish. You can also manage other aspects such as water quality and cleanliness of the tank, and enjoy the fun of recording the growth of your fish, witnessing every irreplaceable moment. Fish Joy offers a simple and intuitive interface with practical features, making fish care easy and fun. The activity log feature in the app helps you record the daily activities of your fish in detail, allowing you to better understand and optimize their living environment and health condition. The product has just been launched and hopes to receive feedback from fellow fish enthusiasts. If you have any comments or suggestions, feel free to contact me in various ways. I hope everyone can feel the joy of fishkeeping and experience the joy of life while using it. Current Main Features: Manage and record small fish and their activities Manage and record tank and tank activities Notifications for various types of activities Themes, category tags, and other settings User Rights: The basic version currently has some restrictions on entry recording, but other features are the same as the premium version. In-App Purchase: Payment will be charged to your Apple ID account at the confirmation of purchase. Subscription automatically renews unless it is canceled at least 24 hours before the end of the current period.Your account will be charged for renewal within 24 hours prior to the end of the current period. You can manage and cancel your subscriptions by going to your account settings in the App Store after purchase. Email jiangdi0924@gmail.com Terms: https://jdi-app.notion.site/Terms-5a99ba5bf942491b8299c07221bb5f7b Privacy: https://jdi-app.notion.site/Privacy-Policy-cdb1be6b87f64c06b7dbea6ffbbad83f

Screenshots

マイメダカ日記4 screens
JoyFish4 screens

Verdict

The call

The clearest difference is in-app purchases: マイメダカ日記 at none against JoyFish's 2. マイメダカ日記 also leads on device support (3 vs 1) and iOS requirement (10.0 vs 17.0). JoyFish's advantage is update cadence (monthly vs every 11 months). On price and ads 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. JoyFish sells 2 in-app purchases, starting at $0.99 per month. マイメダカ日記 asks for nothing beyond the download.

UpkeepUpdate frequency

マイメダカ日記 ships an update every 11 months, JoyFish monthly. The most recent releases landed on October 26, 2026 and November 5, 2026 respectively.

Scorecard4 real differences · 2 level
マイメダカ日記 versus JoyFish: the parameters behind the verdict, then further details
Parameterマイメダカ日記JoyFish
PriceFreeFree
Update frequencyEvery 11 monthsMonthly — better
AdsNoNo
In-app purchasesNo — betterYes
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS10.0 — better17.0
Further details — not scored
Size13 MB8 MB
Age rating4+4+
DeveloperSatoru Nakamura笛 姜

In-app purchases

None

マイメダカ日記

No in-app purchases

2 purchases

JoyFish

Subscriptions1
  • Monthly Premium$0.991 Month
One-time1
  • Lifetime Premium$3.99

Questions

Is マイメダカ日記 free?
マイメダカ日記 is free to download, with no in-app purchases.
Is JoyFish free?
JoyFish is free to download, with in-app purchases available.
Do マイメダカ日記 or JoyFish have ads?
Neither マイメダカ日記 nor JoyFish shows ads.
Which is updated more often, マイメダカ日記 or JoyFish?
マイメダカ日記 ships an update every 11 months, and JoyFish monthly. Most recently, マイメダカ日記 was updated on October 26, 2026 and JoyFish on November 5, 2026.

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