Comparison

OneDay日記 vs Shared Diary

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

Head to head
About

OneDay日記

Features
Read full description

◆共有日記アプリの特徴 その名の通り、共有機能があります。 閲覧回数も見えるようになっています。 もちろん共有せず、読み専(ROM)でもOKです。 他の人の日記を参考にして自分の経験として吸収するのもOKです。 また、メールアドレスを登録すると、 共有時に表示される名前とアイコンを設定することができます。 広告も入れていません。完全にフリーです。安心してお使いください。 ※注意事項※ ①日記を共有する場合は、人物/場所が特定できるような誹謗中傷などはご遠慮ください。 ②現在バックアップ機能はありません。 →version1.4よりバックアップ機能を追加しました。

About

Shared Diary

Features
Read full description

[Overview] This is a diary app that lets you share your days with people you care about. Here are some ways you can use it: * Jot down your thoughts and feelings as a personal diary * Share your daily life with close friends or your partner * Talk about your day with your child * Use it with your spouse to share little things—like gratitude, happy moments, or updates about the kids * Use it in a small team to keep track of daily work or share reports Once you get into the habit of writing a diary, you start noticing more things around you. It helps you become more aware of the little joys in everyday life, and it also strengthens your ability to express your thoughts in words. Being able to put your feelings and ideas into words boosts your communication skills, which can really help in your relationships—at school, work, or at home. If reading this made you think, "Maybe I’ll give diary writing a try," we’re happy to hear it. Even writing just 20 or 30 characters a day is totally fine. And honestly, you don’t even need to use this app—we just hope it encourages you to start. [Recommended for people who] * Want a simple, easy-to-use diary app * Want to build a daily writing habit * Feel shy about expressing feelings out loud * Want to do a shared/partner diary * Don’t want to exchange LINE but still want a casual way to communicate in text Term of service(EULA): https://originate-aster.co.jp/shared-diary/terms privacy policy: https://originate-aster.co.jp/privacy-policy/

Screenshots

OneDay日記2 screens
Shared Diary4 screens

Verdict

The call

The clearest difference is in-app purchases: OneDay日記 at none against Shared Diary's 1. OneDay日記 also leads on ads (none vs shown) and device support (3 vs 1). Shared Diary's advantage is update cadence (fortnightly vs every 7 months). On price and iOS requirement 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. Shared Diary sells 1 in-app purchase, starting at $2.99 per month. OneDay日記 asks for nothing beyond the download.

UpkeepUpdate frequency

OneDay日記 ships an update every 7 months, Shared Diary fortnightly. The most recent releases landed on September 19, 2026 and September 24, 2026 respectively.

Scorecard4 real differences · 2 level
OneDay日記 versus Shared Diary: the parameters behind the verdict, then further details
ParameterOneDay日記Shared Diary
PriceFreeFree
Update frequencyEvery 7 monthsFortnightly — better
AdsNo — betterYes
In-app purchasesNo — betterYes
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.6 — better16.0
Further details — not scored
Size42 MB41 MB
Age rating17+4+
DeveloperHiroki SatoOriginate Aster, Inc.

In-app purchases

None

OneDay日記

No in-app purchases

1 purchases

Shared Diary

Subscriptions1
  • Proプラン(1か月間)$2.991 Month

Questions

Is OneDay日記 free?
OneDay日記 is free to download, with no in-app purchases.
Is Shared Diary free?
Shared Diary is free to download, with in-app purchases available.
Do OneDay日記 or Shared Diary have ads?
Shared Diary shows ads; OneDay日記 does not.
Which is updated more often, OneDay日記 or Shared Diary?
OneDay日記 ships an update every 7 months, and Shared Diary fortnightly. Most recently, OneDay日記 was updated on September 19, 2026 and Shared Diary on September 24, 2026.

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