String Change Diary

Save your string-change history and track replacement timing

Add a new entry This data is stored only on your device.

Per-instrument summary

Change history

Filter by instrument

No entries yet. Add your first string change above.

Import JSON

Guide

String Change Diary — Features & How to Use

Keeping a record of your string changes helps you track tone changes and instrument condition. All entries are stored only in this device's browser.

Basic Operations

How to add an entry

Enter the change date — Today's date is selected by default.

Enter the instrument, string type, and gauge — Instrument names you've entered before are remembered as suggestions, making them easier to pick next time.

Add entry — It's added to the list, sorted with the newest date first.

Reading the Days-Since Display

Two kinds of day counts

Days since shows how many days have passed from that change to today. Interval from previous is the number of days between that change and the previous change for the same instrument, giving you a sense of your replacement pace.

Summary and Replacement Timing Guide

Signs it's time to change strings

Each instrument's summary shows the average replacement interval and the days elapsed since the last change. Compared against a typical string lifespan guideline (roughly 45–75 days), it's shown in green (still fine), yellow (getting close), or red (overdue). This is only a guideline, so trust your ears and feel over the numbers.

Edit, Delete, and Data Management

Edit

Use the "Edit" button on an entry to load its details into the form for editing.

Delete

Pressing "Delete" shows a confirmation dialog.

Export

Save your entries to a file in JSON or CSV format.

Import

Load a previously exported JSON file to restore or merge entries.