# Log - Thought Log — Ideas that evolve

> Ideas that evolve (iPhone/iPad app by mika masuda.)

- Source: https://appshunter.io/ios/app/log-thought-log/id6760690075 (this page in markdown: same URL + `.md`)
- Developer: [mika masuda](https://appshunter.io/developer/1885758479)
- Category: Productivity
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 13.0 · 40 MB
- Languages: American English, Japanese
- Released: 2026-10-02
- Data updated: 2026-10-15

## What is Log?

Log is a thought log for people who turn ideas into reality.
Capture an idea in one line. Not a record, but a log for evolution.

You wrote it down, then lost track of it. Ideas pile up, but you can't tell what moved forward and what stalled. Log keeps your thinking not as scattered dots, but as a history of change.

CAPTURE IN ONE LINE
Save a thought before it fades, with the fewest taps. Organize later. Type #tags in the title and they are added automatically.

CONNECT YOUR THINKING
Link related logs and keep a thought history (v1 → v2 → v3), so you always know where an idea came from and where it went.

DIG DEEPER WITH AI
Chat with Claude, ChatGPT or Gemini about one log or a bundle of logs. Save a good reply back as a new log with one long-press. AI ideas suggests three next steps: dig deeper, branch out, or move to the next stage.

SIX LAYERS OF THINKING
Idea → Output → Build → Launch → Review → Reach. Give each log a layer and see how far each thought has grown.

SPIRAL GRAPH™
See the density, depth and reach of your thinking on Log's own logarithmic spiral. Tap a layer to open its logs.

WRITE MATH
Wrap text in $ to show it as math, in your notes and in AI replies. Great for math and physics study logs.

EXPORT AS MARKDOWN
Export a whole folder as a ZIP of Markdown files, one note per log, ready for Obsidian and other apps. Back up and restore everything with JSON.

PRIVATE BY DESIGN
Your logs stay on your device. Log has no server and never uses your logs for training. Lock the app with Face ID. AI features use your own API key, stored in the iOS Keychain and sent only to the AI provider you choose.

PRICING
Free: up to 3 folders and 50 logs, with every feature.
Pro: unlimited folders and logs. One-time purchase, no subscription.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Log Pro | $5.99 | one-time |


## Is Log safe?

Not enough ratings yet to assess Log.

## Is Log legit?

Log - Thought Log has limited verification signals. The AppsHunter Legitimacy Score for Log is 58 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 5 releases)

### 1.2.0 — 2026-10-05

Log now speaks English. The app follows your iPhone's language, and you can switch it in Settings > Log > Language.

### 1.1.8 — 2026-09-29

Face ID をキャンセルした後に何度も表示される問題を修正しました。
その他軽微なバグを修正しました。

### 1.1.7 — 2026-09-05

AIモデルを更新しました。（ChatGPT/Gemini）
ロックの不具合を解消しました。
データエクスポート項目にタグ、ピン留め、AIチャットを追加しました。

### 1.1.6 — 2026-08-11

UIの改善を行いました。
AIプロジェクトにログを追加機能を実装しました（複数のログを紐づけてAIと会話ができます）。
軽微なバグを修正しました。

### 1.1.5 — 2026-08-02

パスコードロック機能を追加しました。
フォルダにマークダウンエクスポート機能を追加しました。

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## More apps by mika masuda

- [スロログ - パチスロ収支・立ち回り](https://appshunter.io/ios/app/id6810979308)

All apps by mika masuda: https://appshunter.io/developer/1885758479

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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 2026-10-15.*