# ThreeLinesDiary

> Three-line journaling app to improve sleep quality with photo support and reminders. (iPhone/iPad app by Seiji Nagano.)

- Source: https://appshunter.io/ios/app/threelinesdiary/id1161808671 (this page in markdown: same URL + `.md`)
- Developer: [Seiji Nagano](https://appshunter.io/developer/689628441)
- Category: Utilities, Productivity
- Price: Free
- Age rating: 4+
- Requires: iOS 15.0 · 7 MB
- Languages: American English, Japanese
- Released: 2016-10-07
- Data updated: 2026-06-11
- Monetization: ad-supported
- User reviews in markdown: https://appshunter.io/ios/app/threelinesdiary/id1161808671/reviews.md

## What is ThreeLinesDiary?

Write become just're autonomic nerve health. Write before going to bed, sleep quality is improved. 3-line diary which is said to have this effect.
This app is an app that aims to write such a three-line diary.

The has been prepared three items we wrote so good a word. In some cases, you might want be left with a photograph.

In this app, you can save with a photo for each of the three items.

Also to write every day, you might forget.

In this app, by making a notification to the specified time, you will be able to habit to write at the same time each day.

## Key features

- Three-line daily journal entries
- Attach photos to entries
- Daily writing reminders
- Improve sleep quality
- Simple and intuitive interface

## Recent user reviews (4 of 4)

All indexed reviews: https://appshunter.io/ios/app/threelinesdiary/id1161808671/reviews.md

### 4/5 — 項目編集

*2025-08-12, version 2.0.0*

3つの項目を自分で編集できると良い

### 3/5 — あと少し！

*2023-01-31, version 1.3.0*

前者の方もおっしゃっていましたが、編集モードだけではなく、閲覧モードが可能になるともっと使いやすくなると思いました！振り返ろうと思って過去の日記を開いた後、破棄しますか？と聞かれるとドキッとします。改善希望で☆-2です。

### 4/5 — いいと思います。

*2022-08-26, version 1.3.0*

書くだけで自律神経が整う、いいと思います。
日記は別につけていますが、こちらも気軽に続けられそう。
編集ではなく、閲覧モードを実装していただけるとありがたいです。毎回編集を破棄しますか？と聞かれるのでどきっとしますので。

### 5/5 — 理論に基づく、日記！

*2021-11-27, version 1.3.0*

最近、書籍を読んでいたら、3行日記に興味を持ち、アプリを探したらありました！
自分で作ろうと考えでましたが助かります。ありがとうございます♪
セリグマン法則

・毎日3つの良い事を書く(手帳などに)と幸せになる♪

ペンシルバニア大学のマーティン・セリグマン教授の研究成果

## Frequently asked questions about ThreeLinesDiary

### What is ThreeLinesDiary?

ThreeLinesDiary is a journaling application designed to help users improve their sleep quality by writing a brief, three-line entry each night. It also allows for the inclusion of photos with each entry.

### How does ThreeLinesDiary help improve sleep?

The app is based on the principle that writing a short, three-line diary before bed can positively impact autonomic nerve health and subsequently improve sleep quality. It encourages a reflective habit before resting.

### Can I add photos to my diary entries in ThreeLinesDiary?

Yes, ThreeLinesDiary allows you to save a photograph with each of your three-line diary entries, providing a visual element to your daily reflections.

### Does ThreeLinesDiary have ads?

Yes, ThreeLinesDiary contains advertisements. It is available for free but supported by ads.

### Can I set reminders to write in ThreeLinesDiary?

Yes, the app features a notification system that can be set for a specified time. This helps users establish a consistent habit of writing their daily entries at the same time.

### What devices is ThreeLinesDiary compatible with?

ThreeLinesDiary is available for iPhone and iPod devices. It is rated for ages 4 and up.

### How often is ThreeLinesDiary updated?

The latest version of ThreeLinesDiary is 2.0.0, and it was last updated on November 15, 2023. Updates typically occur to improve functionality and user experience.

### Is ThreeLinesDiary free to use?

Yes, ThreeLinesDiary is free to download and use. Its monetization comes from advertisements displayed within the app.

## Version history (last 5 releases)

### 2.0.0 — 2023-11-15

Additional features and changes
・Addition of viewer mode
・Addition of color theme (select from 3 types of background color)
・Added the function to change the date and time of the diary
・Change layout when editing diary
・Bug fixes

### 1.3.0 — 2021-08-26

Supports title change
Bug fix

### 1.2.3 — 2020-11-25

Bug fix (corrected display in dark mode)

### 1.2.2 — 2020-11-21

Bug fix (corrected display in dark mode)

### 1.2.1 — 2020-09-18

Compatible with iOS14

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## More apps by Seiji Nagano

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- [RootCalculator](https://appshunter.io/ios/app/rootcalculator/id792752103)

All apps by Seiji Nagano: https://appshunter.io/developer/689628441

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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 2026-06-11.*