The app Tea Memory provides you a free of charge and ad-free tea timer.
Save, edit and delete tea
Name, variety, temperature, amout, time
For each tea a timer can be set
Melody for the timer is selectable
Additional notification and vibration
Several brews possible
Cooling time for water, can be entered or calculated approximately
Choose between Fahrenheit and Celsius
And between g/L (gram per liter) and ts/L (teaspoon per liter)
Teas are listed
Sort by last activity, alphabetically or variety
To select the individual melody it is necessary to read from the phone memory.
About Feedback or suggestions I would be happy.
Have fun with the app.