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🎾RacketLog – Remember Your Racket Tension

RacketLog is a dedicated racket tension management and match logging app for tennis and badminton enthusiasts.
With each match, string tension gradually decreases. However, it's difficult to determine by feel alone when and how much it has decreased, or when it's time to restring.
RacketLog helps you predict string tension trends and manage restringing timing with a simple post-match log.

🔧 App Key Features

✅1. Home Screen – View the current status of each racket at a glance

View your racket list and view current estimated tension, string condition, and expected re-string timing in a card format.

Visualize tension change graphs in sparkline format along with a list of recent match records.

Switch to another racket using the racket selection dropdown.

✅2. Add Records – Complete match records in seconds.

Easily enter match date, number of matches (sets), perceived tension (slider), string feel, etc.

Select string type (POLY / MULTI / HYBRID).

Add simple notes or equipment photos (optional).

Automatically estimates tension loss and updates racket condition upon saving.

✅3. Record Details – Analyze string condition after a match.

Analysis of racket tension on the day of the match (e.g., perceived 45 lbs → estimated actual 43 lbs).

Compare tension changes over the last 10 matches, showing increases and decreases compared to the average.

Remaining matches Provides a number-based restring recommendation badge

Edit records, check notes, and view photos

✅4. Racket Management – ​​String/Racquet-specific history storage

Register racket name, manufacturer, default tension, string type, photos, etc.

Set cumulative matches and restring criteria for each racket

Even if one player uses multiple rackets, each can be managed separately

✅5. Statistics – Visual insights rather than numbers

Date-based tension change graph (supports lbs or kg)

Estimate average tension decrease compared to the number of matches per racket

Monthly match count, average set count graph, etc.

Displays a card that says, "At current speed, string replacement recommended on ○○ day"

Generate monthly report button (can trigger full-page ads)

✅6. Settings – Data Export and Customization

Export records to CSV file (optional)

Set racket sort order and designate a default racket

Set units: lbs ↔ kg

🎯RacketLog's Strengths

✅All data is stored locally on the device (RoomDB-based, not cloud-integrated)

✅Predict tension changes with simple match input, even without AI.

✅Equipment management features comparable to professional apps, including photo attachment, stats analysis, and re-string notifications.

✅Supports both tennis and badminton, allowing multiple racket management.

✅Statistics and insights are automatically generated as your records accumulate.

📌Recommended for:

Tennis/badminton enthusiasts who are sensitive to string tension changes.

Users who alternate between two or more rackets.

Users who frequently ask themselves, "When was the last time I changed my strings?"

Users who need an equipment condition management app, not just a simple match logging app.

🔒Privacy and Storage Policy

User records are stored locally on the device.

The app operates independently, without Google integration, and does not use separate server storage.

Advertisements are placed minimally to avoid interfering with the user experience.