This is an application that combines the concept of improvement with a real-world stopwatch to instantly calculate and display the rate of improvement based on the measured time.

The measured time data can be saved as snapshots, and each snapshot can be given a name and remarks. It also provides a simple file system as a function within the app, allowing you to store the saved snapshots in any folder and manage each data easily and intuitively.

In various use cases, the idea of "improvement rate" is whether the time has decreased or increased compared to the reference time, and this application implements a mechanism to give the improvement rate for both directions, and the user can set whether the decreasing trend is better or the increasing trend is better for each snapshot unit.

It also supports dark mode, so you can switch the theme from the settings screen.

In brief, this app has the following features.

1. You can measure time with a stopwatch.
2. The time measured by the stopwatch can be saved as a snapshot.
3. You can give a name and remarks to the saved snapshot.
4. Saved snapshots can be managed in a folder in the app.
5. You can calculate the improvement rate with one tap from the measured time.
6. Dark mode is supported.