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Nook

Your mood as a color, your day as a photo. A shared diary you read and comment on with friends or a partner.

Google Play

Android, Rated 12+

Main features

Diary screen with a photo and a mood

One photo, one line of mood

Pick a color for today's mood, then add a photo and a single line. There are twelve moods to choose from, and up to 10 photos per entry.

Calendar screen filled with photos

A month filled with photos

Each day builds into a grid of photos and mood colors. You can filter by mood, people, or tags.

Writing screen for choosing text, photos, mood, and people

One feed with the people you were with

Tag a friend as someone you were with, and both of your entries gather in one feed. Hearts and short comments stay between the people who were there.

Theme selection screen

Default, hamster, rabbit

Choose the hamster or rabbit theme and the app turns pastel, with moods picked as character faces. You can change it any time in settings.

My profile and visibility screen

Private by default

Every entry is private by default. Open it only as far as you want: to the people you were with, or to everyone.

Nook start screen

A small diary

It works fine on your own. Write with friends or a partner and, like an exchange diary, your days come together in one place.

Also included

How to use it

  1. Pick a color for your mood and add a photo and a line.
  2. Tag the people you were with, or keep it private.
  3. Look back on your days with the calendar and the review.

Visibility and privacy

Built with AI

A diary shared only with people close to you

It's a mood diary you share only with people close to you, without worrying about like counts. The writing, calendar, and feed screens were made with AI.

Fixed by using it

A recent update split the feed into today, yesterday, and this week, and let long entries expand inside the card. It also fixed a problem when long-pressing to open a menu, and search results switching back to an older search term.

By the numbers

The repository has 389 commits, and as of October 6, 2026, the app version is 1.0.12. The server uses Spring Boot and PostgreSQL; the app uses Next.js and Capacitor.

Read the full build log

Questions

Can other people see my diary?

Entries are private by default. You can open them only as far as you want: to the people you were with, or to everyone.

Can I use it with a partner or friends?

Yes. Tag a friend as someone you were with, and both of your entries gather in one feed.

How many photos can I upload?

Up to 10 per entry.

Can I write entries from older photos?

Yes. Import gallery photos with their original date and location, and they're sorted into days.

Can I use it as a parenting diary?

Yes. Add family members as Nook friends and tag them as people you were with, and you can all see the same feed and leave comments.

Google Play

Based on the Google Play listing and the app repository docs.