Study Density Log

In addition to the actual study time, this is a learning record app that visualizes "how deeply you studied" using "concentration-converted time" weighted by concentration level. It's packed with daily task management, continuous achievement streaks, and a calendar to keep you studying consistently.

🔑 Before You Start

• Google account login is required to use this app.
• Data is saved to the cloud and synced across multiple devices like smartphones and PCs (only you can access your data).

📱 For Smartphone Users, Adding to Home Screen is Recommended!

The app launches in full screen like a native app, and performance improves.

• iPhone (Safari): Share button → "Add to Home Screen"
• Android (Chrome): Menu (⋮) → "Add to Home Screen"

🚀 How to Use

1. Log in with your Google account
2. From the "Add" tab, register your study records (you can also use the stopwatch to measure)
3. From the "Goals" tab, set your weekly target hours, calendar, and daily tasks
4. On "Home", complete today's tasks and build your streak (consecutive achievement days)!

✨ Main Features

• Concentration-converted time … Automatically calculates study time weighted by concentration level (S to D)
• Subject/Material/Label classification and aggregation/graphs for today/this week/this month/cumulative
• Weekly goals & achievement rate / Calendar showing days you studied
• Daily task management (carry over incomplete tasks from the previous day to the next day)
• Study streaks / Task memos / Stopwatch / Countdown to test

🔒 Privacy

Study records, material names, memos, and other data are safely saved as data belonging to the logged-in user. Other users cannot see your data.