# ThreeLinesDiary vs Diary Notes

The clearest difference is in-app purchases: ThreeLinesDiary at none against Diary Notes's 1. ThreeLinesDiary also leads on iOS requirement (15.0 vs 26.0). Diary Notes's advantage is ads (none vs shown) and update cadence (every 4 days vs every 6 months). On price and device support there is nothing between them.

Both are free to download. Diary Notes sells 1 in-app purchase, starting at $0.99 per month. ThreeLinesDiary asks for nothing beyond the download.

ThreeLinesDiary ships an update every 6 months, Diary Notes every 4 days. The most recent releases landed on September 8, 2026 and September 7, 2026 respectively.

## The numbers

| Metric | ThreeLinesDiary | Diary Notes |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 75.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 6 months | **Every 4 days** |
| Monetization | Ad-supported | — |
| Size | 7 MB | 173 MB |
| Requires iOS | **15.0** | 26.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Seiji Nagano](https://appshunter.io/developer/689628441) | [tadahiro mori](https://appshunter.io/developer/1541301326) |

## What reviewers say

### ThreeLinesDiary

[App page](https://appshunter.io/ios/app/threelinesdiary/id1161808671)

A simple journaling app designed to improve sleep quality by encouraging users to write a three-line diary entry before bed. It allows for photo attachments and provides daily reminders to help build a consistent writing habit.

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

**Features:** macOS Compatibility

**In-app purchases:** none


### Diary Notes

[App page](https://appshunter.io/ios/app/diary-notes-handwritten/id6479974763)

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 月額プラン | $0.99 | per month |


## Frequently asked questions

### Is ThreeLinesDiary free?

ThreeLinesDiary is free to download, with no in-app purchases.

### Is Diary Notes free?

Diary Notes is free to download, with in-app purchases available.

### Do ThreeLinesDiary or Diary Notes have ads?

ThreeLinesDiary shows ads; Diary Notes does not.

### Which is updated more often, ThreeLinesDiary or Diary Notes?

ThreeLinesDiary ships an update every 6 months, and Diary Notes every 4 days. Most recently, ThreeLinesDiary was updated on September 8, 2026 and Diary Notes on September 7, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*