# 片手キーボードPRO vs ThreeLinesDiary

The clearest difference is price: ThreeLinesDiary at Free against 片手キーボードPRO's $3.99. 片手キーボードPRO's advantage is ads (none vs shown) and update cadence (every 3 months vs every 6 months). On in-app purchases, device support and iOS requirement there is nothing between them.

ThreeLinesDiary is free to download; 片手キーボードPRO costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

片手キーボードPRO ships an update every 3 months, ThreeLinesDiary every 6 months. The most recent releases landed on September 22, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | 片手キーボードPRO | ThreeLinesDiary |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Positive reviews | — | 75.0% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 3 months** | Every 6 months |
| Monetization | — | Ad-supported |
| Size | 112 MB | 7 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [TAWASHI KAMEMUSHI](https://appshunter.io/developer/435733426) | [Seiji Nagano](https://appshunter.io/developer/689628441) |

## What reviewers say

### 片手キーボードPRO

[App page](https://appshunter.io/ios/app/pro/id1021368752)

**Features:** Vision Pro support

**In-app purchases:** none


### 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


## Frequently asked questions

### Is 片手キーボードPRO free?

片手キーボードPRO costs $3.99, with no in-app purchases.

### Is ThreeLinesDiary free?

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

### Do 片手キーボードPRO or ThreeLinesDiary have ads?

ThreeLinesDiary shows ads; 片手キーボードPRO does not.

### Which is updated more often, 片手キーボードPRO or ThreeLinesDiary?

片手キーボードPRO ships an update every 3 months, and ThreeLinesDiary every 6 months. Most recently, 片手キーボードPRO was updated on September 22, 2026 and ThreeLinesDiary on September 8, 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.*