# Kokoro Diary: AI Companion — Write and feel your emotions

> Write and feel your emotions (iPhone/iPad app by KnotNest.)

- Source: https://appshunter.io/ios/app/kokoro-diary-ai-companion/id6747308313 (this page in markdown: same URL + `.md`)
- Developer: [KnotNest](https://appshunter.io/developer/1813321541)
- Category: Lifestyle, Entertainment
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 15.6 · 69 MB
- Languages: English
- Released: 2025-07-03
- Data updated: 2026-05-18
- User reviews in markdown: https://appshunter.io/ios/app/kokoro-diary-ai-companion/id6747308313/reviews.md

## What is Kokoro Diary?

Kokoro Diary turns everyday journaling into a gentle mood-tracking habit. Write a note and your feelings are instantly shown in colors and charts, helping you relieve stress and understand yourself better. Enjoy every feature ad-free for 5 days; afterward, watch an ad whenever you want to unlock everything again.

Main features
Automatic mood scoring that rates positive and negative tones
Mood calendar that colors each day for quick insight
Weekly and monthly trend graphs to spot recurring patterns
Stability graph to monitor emotional ups and downs
Entry history with streaks, total words, average length
Word ranking that highlights your most used terms
More than ten supportive partner characters to choose from
Multi-language support and secure local storage
Reward ad model so you control when to view ads

Perfect for
Organizing daily thoughts and stress
Discovering personal mood patterns
Building a sustainable journaling routine
Receiving positive feedback to stay motivated
Start your path to better self-care with Kokoro Diary today.

Privacy Policy
https://knotnest.github.io/privacypolicy/heart_diary_en.html

Terms of Use
https://knotnest.github.io/conditions/heart_diary_en.html

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Monthly subscription | $1.99 | per month |
| Yearly subscription | $19.99 | per year |



## Version history (last 5 releases)

### 1.2.18+56 — 2025-09-15

Improvements
- Changed the radar chart delivery frequency from monthly to weekly.

### 1.2.17+55 — 2025-09-12

We’ve made the following improvements:
- Tuned the Advice Mode
- Tuned the Behavior Analysis Mode
- Revised the growth comments for the "Kokoro Tree"

### 1.2.16+54 — 2025-09-09

New Features
・Improved: You can now change your partner when registering a diary entry
Fixes
・Fixed: Emotion monitoring and stability graphs on the dashboard were not displaying correctly
・Fixed: Issue where Kokoro-kun's comments appeared empty

### 1.2.11+49 — 2025-08-29

Feature Improvements
・Improved diary entry registration speed
Bug Fixes
・Fixed an issue where the nickname setup screen appeared twice during first registration
・Fixed an issue where the notification settings screen opened when registering a diary entry

### 1.2.10+48 — 2025-08-28

Fine-tuned the layout of the "Heart Tree".  
Fixed an issue where diary entries could not be added after leaving the app idle for a long time.

## Apps similar to Kokoro Diary

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Hitokotonikki - Daily One-Line](https://appshunter.io/ios/app/hitokotonikki-daily-one-line/id6743984284) | — | Free | Lifestyle |
| [Archive-For Your Journaling](https://appshunter.io/ios/app/archive-for-your-journaling/id6502951787) | — | Free | Lifestyle |
| [AI Diary Kirono:Cute & Easy.](https://appshunter.io/ios/app/ai-diary-kironocute-and-easy/id6736706558) | — | Free | Lifestyle |
| [TalkJournal: Voice Diary AI](https://appshunter.io/ios/app/talkjournal-voice-diary-ai/id6739941510) | — | Free | Lifestyle |
| [AI Diary: What's Happening](https://appshunter.io/ios/app/ai-diary-whats-happening/id6747035770) | — | Free | Lifestyle |
| [AI仏](https://appshunter.io/ios/app/ai/id6743794231) | — | Free | Lifestyle |

## More apps by KnotNest

- [LifeTimer-Daily Routines](https://appshunter.io/ios/app/lifetimer-daily-routines/id6745680646)
- [Myインターバルタイマー - 筋トレ・HIIT・ワークアウト](https://appshunter.io/ios/app/my-hiit/id6745688024)
- [3単語日記 - 脳内メーカー・思考可視化](https://appshunter.io/ios/app/3/id6745698061)
- [今日の仮面-本当の私を探して-](https://appshunter.io/ios/app/id6746174276)
- [X秒ぴったりチャレンジ - 反射神経&罰ゲームパーティー](https://appshunter.io/ios/app/x-and/id6746489861)

All apps by KnotNest: https://appshunter.io/developer/1813321541

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-05-18.*