Comparison

共有めも 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

共有めも

Features
Read full description

共有めもは、家族や夫婦で使える買い物リストアプリです。 買うものを同じリストで共有でき、買ったものをチェックすると相手にもすぐ反映されます。 チャットで買い物リストを送ると、他の会話に埋もれてしまうことがあります。 共有めもなら、買うものだけをシンプルに管理できるので、買い忘れや二重買いを防ぎやすくなります。 主な機能 - 買い物メモの追加 - 買ったもののチェック - 家族や夫婦とのリスト共有 - リアルタイム同期 - スーパー、ドラッグストア、百均など買い物先ごとのタブ整理 こんな人におすすめ - 家族で買い物を分担している - 夫婦や同棲中の相手と買い物メモを共有したい - 買ったものの連絡漏れを減らしたい - 買い物リストをシンプルに管理したい 使い方はかんたんです。 買うものを追加して、買ったらチェックするだけ。 共有した相手にも更新が反映されるので、同じ買い物リストを見ながら買い物できます。 家族や夫婦の毎日の買い物に、共有めもをぜひ使ってみてください。

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

共有めも3 screens
Shared Diary4 screens

Verdict

The call

The clearest difference is in-app purchases: 共有めも at none against Shared Diary's 1. Shared Diary's advantage is update cadence (fortnightly vs every 3 months). On price, ads, device support 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. 共有めも asks for nothing beyond the download.

UpkeepUpdate frequency

共有めも ships an update every 3 months, Shared Diary fortnightly. The most recent releases landed on September 10, 2026 and September 24, 2026 respectively.

Scorecard2 real differences · 4 level
共有めも versus Shared Diary: the parameters behind the verdict, then further details
Parameter共有めもShared Diary
PriceFreeFree
Update frequencyEvery 3 monthsFortnightly — better
AdsYesYes
In-app purchasesNo — betterYes
DevicesiPhone, iPod — betteriPhone
Requires iOS15.1 — better16.0
Further details — not scored
Size38 MB41 MB
Age rating4+4+
DeveloperYoshiki HishikawaOriginate Aster, Inc.

In-app purchases

None

共有めも

No in-app purchases

1 purchases

Shared Diary

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

Questions

Is 共有めも free?
共有めも 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 共有めも or Shared Diary have ads?
Both 共有めも and Shared Diary show ads.
Which is updated more often, 共有めも or Shared Diary?
共有めも ships an update every 3 months, and Shared Diary fortnightly. Most recently, 共有めも was updated on September 10, 2026 and Shared Diary on September 24, 2026.

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