Comparison

ことりにっき vs usagiDiary

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

Head to head
About

ことりにっき

Features
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小鳥飼いにうれしい、小鳥・小動物に特化した健康管理アプリです。 小鳥の健康管理には体重記録が不可欠です。これを続けることで、体調の変化に気づくことができるでしょう。 0.1グラム単位での体重・エサの量・水の量の入力がかんたんにできます。 また、お世話やタマゴの記録、日記、写真といった様々な情報を鳥1羽ごとに管理できます。 体重・エサ・水の量は日々の推移をグラフで確認可能です。 誕生日・お迎え日を設定しておけば、記念日を通知してくれます。 また、日記の検索・コピー・貼り付けといった機能も備えています。 すべての情報を端末内に保管しているため、IDなどの登録が必要なくすぐに使い始めることができます。 ※不慮の故障などに備え、iCloudやiTunesなどにバックアップすることを強く推奨します。 ※また、有料限定となりますがTSV(タブ区切り)バックアップ機能も備えておりますのでご利用ください。こちらは写真のバックアップは不可となります。 ---無料での機能制限--- ・広告が表示されます ・登録できる鳥は2羽まで ・写真は1羽につき1日1枚まで ・日記の検索は文字のみ対応 買い切り型の有料オプションで、さらに鳥との暮らしが充実します。 ・広告が非表示になります ・鳥が無制限に登録できます ・写真は1羽につき1日5枚まで ・体重グラフの重ね合わせができるようになります ・すべての鳥の日記を一括で、かつ日付・アイコンや体重で絞り込んで検索できます ・鳥の情報と日々の記録がTSV(タブ区切り)でバックアップできるようになります

About

usagiDiary

Easily track your rabbit's daily health and care activities. Monitor food intake, weight, droppings, and more with customizable categories and a visual calendar. Get deeper insights with premium features for long-term health tracking.

Highlights
  • Daily health logging for rabbits
  • Customizable care categories
  • Calendar view of entries
  • Visual weight tracking chart
  • Support for multiple rabbits
  • Birthday and anniversary celebrations
Features
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"Is my rabbit eating less than usual?" That small observation could be the first step to protecting your rabbit's health. usagi Diary makes daily care visible and helps you spot changes early. [Made for rabbits - done in 30 seconds] Food amount, weight, droppings, urine, water intake, grooming, vet visits, medication, and diary. 9 categories designed just for rabbits. No unnecessary steps, so you can keep it up every day. Reorder the categories or hide the ones you don't need. Customize it to fit your routine. [Calendar view for the full picture] Every entry shows up as a marker on the calendar. Tap a date to instantly see that day's records. Perfect for preparing before your next vet visit. [Weight chart catches changes] Track your rabbit's weight over time with a visual chart. Color-coded zones based on veterinary guidelines show you at a glance what to watch for. Charts up to 1 month are free. [Multiple rabbits welcome] Register as many rabbits as you like. Switch between them with one tap and manage each health record separately. [Celebrate birthdays and anniversaries] "She turns 3 today!" "100 days since coming home!" Birthdays, anniversaries, and milestones are celebrated automatically. Your daily entries become memories too. [Premium for deeper insights] - Weight chart from 3 months to all time - Breed-specific growth curves for comparison - Water intake chart All recording features and the weight chart up to 1 month are free. Start with your first entry today. Languages: English / Deutsch / 日本語 / 한국어

Screenshots

ことりにっき4 screens
usagiDiary3 screens

Verdict

The call

The clearest difference is ads: usagiDiary at none against ことりにっき's shown. usagiDiary also leads on update cadence (fortnightly vs every 6 weeks). ことりにっき's advantage is iOS requirement (12.0 vs 16.0). On price, 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. ことりにっき sells 1 one-off in-app purchase and usagiDiary sells 4 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

ことりにっき ships an update every 6 weeks, usagiDiary fortnightly. The most recent releases landed on October 26, 2026 and October 24, 2026 respectively.

Scorecard3 real differences · 7 level
ことりにっき versus usagiDiary: the parameters behind the verdict, then further details
ParameterことりにっきusagiDiary
PriceFreeFree
Rating—5.0 (1 ratings) — better
Positive reviews—42.1% of reviews
Number of ratings—1 — better
Update frequencyEvery 6 weeksFortnightly — better
AdsYesNo — better
In-app purchasesYesYes
Monetization—Freemium
DevicesiPhone, iPod — betteriPhone
Requires iOS12.0 — better16.0
Further details — not scored
Size17 MB110 MB
Age rating4+17+
DeveloperAkira SakagamiRYUNOSUKE OTA

In-app purchases

1 purchases

ことりにっき

One-time1
  • 有料オプション$2.99
4 purchases

usagiDiary

Subscriptions4
  • usagi Diary Premium$2.991 Month
  • うさぎDiaryプロプラン$5.991 Month
  • usagi Diary Premium(Annual)$19.991 Year
Show 1 more
  • うさぎDiaryプロプラン$49.991 Year

Questions

Is ことりにっき free?
ことりにっき is free to download, with in-app purchases available.
Is usagiDiary free?
usagiDiary is free to download, with in-app purchases available.
Do ことりにっき or usagiDiary have ads?
ことりにっき shows ads; usagiDiary does not.
Which is updated more often, ことりにっき or usagiDiary?
ことりにっき ships an update every 6 weeks, and usagiDiary fortnightly. Most recently, ことりにっき was updated on October 26, 2026 and usagiDiary on October 24, 2026.

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