Comparison

ShareMemo 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

ShareMemo

Easily create and share memos and to-do lists with a partner. Control which notes are shared and receive real-time updates. Cloud storage ensures your data is safe, and quick account linking allows for seamless multi-device use.

Highlights
  • Create and share memos
  • Create and share to-do lists
  • Convert between memo and to-do formats
  • Real-time updates on shared notes
  • Cloud storage for data safety
  • Account linking for multi-device use
  • Export memos to other apps
Features
Read full description

ShareMemo is an application designed for people who often write memos and to-do lists. The memos and to-do lists you create can be easily shared with users registered as partners. You can choose which memos to share individually, so you don't have to share memos you don't want to show. Saved memos and to-do lists are stored in the cloud, so they are safe even if your phone breaks down. There is no annoying user registration when you start using the app. You can start editing your memos the moment you launch the app. [What you can do with ShareMemo] - Create a memo - Create a ToDo memo - Convert memos to To-Do lists and To-Do lists to memos - Sorting the To-Do list - Mark important memos - Filtering by memo content - Sort memos by creation date or update date - When a shared memo is changed, a notification is sent - When a shared memo is changed, you will receive a notification - Changed memos are updated in real time (except for the edit screen) - You can set labels for memos - By linking Google, Apple ID, Facebook, and LINE accounts, you can easily transfer data even if the cell phone changes. Can also be used on multiple devices. - The memos you create can be freely copied to other applications or exported. Terms of Use: https://memo-8bc86.web.app/terms.html Privacy Policy: https://memo-8bc86.web.app/privacy.html

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

ShareMemo4 screens
Shared Diary4 screens

Verdict

The call

The clearest difference is device support: ShareMemo at 3 against Shared Diary's 1. ShareMemo also leads on iOS requirement (13.0 vs 16.0). On price, update cadence, ads and in-app purchases 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. ShareMemo sells 3 in-app purchases, starting at $2.99 per month and Shared Diary sells 1 in-app purchase, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

ShareMemo ships an update every 3 weeks, Shared Diary fortnightly. The most recent releases landed on August 27, 2026 and September 24, 2026 respectively.

Scorecard2 real differences · 6 level
ShareMemo versus Shared Diary: the parameters behind the verdict, then further details
ParameterShareMemoShared Diary
PriceFreeFree
Positive reviews20.0% of reviews—
Update frequencyEvery 3 weeksFortnightly — better
AdsYesYes
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS13.0 — better16.0
Further details — not scored
Size79 MB41 MB
Age rating17+4+
DeveloperToshiaki HayashiOriginate Aster, Inc.

In-app purchases

3 purchases

ShareMemo

Subscriptions2
  • Plus plan(monthly)$2.991 Month
  • Plus plan(yearly)1 Year trial$29.991 Year
One-time1
  • Ad free$5.99
1 purchases

Shared Diary

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

Questions

Is ShareMemo free?
ShareMemo is free to download, with in-app purchases available.
Is Shared Diary free?
Shared Diary is free to download, with in-app purchases available.
Do ShareMemo or Shared Diary have ads?
Both ShareMemo and Shared Diary show ads.
Which is updated more often, ShareMemo or Shared Diary?
ShareMemo ships an update every 3 weeks, and Shared Diary fortnightly. Most recently, ShareMemo was updated on August 27, 2026 and Shared Diary on September 24, 2026.

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