hourglass alarm timer

[Customization elements]
* Falling sand color
* Shape of falling sand
*Sand size
* Hourglass size
* Hourglass background color
*Alarm sound

[Other functions]
* Save multiple set times
* Hourglass time continues even in the background
* Notification when background hourglass ends

It can be used for various purposes below.

1. Time management/timekeeping
Cooking: Use an hourglass to measure cooking time for dishes and baked goods.
Games: Used to set time limits for board games, quizzes, etc.
Concentration time for studying or working: Used to encourage short periods of concentration, like the Pomodoro technique.

2. Meditation/relaxation
Mindfulness: Use the time when the sand is falling to focus on meditation and deep breathing.
Relax: Watching the sand slowly fall calms your mind.

3. Design/Interior
Decoration: Add an accent to your space by placing an hourglass as an interior decoration.
Symbolism: Used as an object to symbolize the passage of time and the importance of a moment.

4. Education/Learning
Teaching children's sense of time: Used to teach children about the passage of time and the importance of time management.
Science experiments: Used in school science and physics classes to teach principles of time measurement.

[I want this kind of person to do it]
1. People looking for relaxation
People who want to relieve stress: People who want to calm their mind by watching the passage of time as a tool to support meditation and relaxation time.
People who want a relaxing pre-sleep routine: People who want to incorporate a short relaxation routine before bed.

2. Parents raising children
Parents who want to develop their child's sense of time: People who want to teach their children the concept of time and use it to manage playtime.
Parents who want to make cleaning and homework time fun: People who want to encourage their children to clean up and do homework in a playful way using an hourglass.

3. Health-conscious people
Fitness Enthusiasts: People who want to do interval training or exercise in short bursts.
People who do a lot of desk work: People who want to use this as a timer to get up regularly to prevent sitting for long periods of time.

4. People who are involved in creative activities
Artists and designers: People who want to use it as a time management tool to focus on creative work.
Writers and programmers: Anyone who wants to use the Pomodoro technique to stay focused.

5. People who are interested in games and education
Board Game Enthusiasts: People who like to set time limits during gameplay.
Teachers and educators: People who want to manage time during lessons or use it as a timer for experiments.

6. People who want to incorporate fashionable elements into their lives
People who are particular about design: People who want to incorporate apps with stylish and unique interfaces into their daily lives.
Interior enthusiasts: People who enjoy the hourglass design and want to take advantage of the app's interface.

Recent changes:
* The delete button on the list screen is now displayed as a slide-out icon.
* A delete button has been added to the details screen.
* Convert the minutes and seconds of the set time to 00 format.