What software can remind customers of their birthdays?

Software that can remind customers of their birthdays, it is recommended that you use a special logo because it:

1 has the advantage of multi-port compatibility, and can be applied to the following ports at the same time: Windows/Android/iPhone/Web/iPad/MAC, which can meet the needs of more platforms;

2. It has the function of to-do reminder, and the dedication sign can set birthday reminder according to the Gregorian calendar date and the lunar calendar date;

3. It has multi-terminal cloud synchronization function. Just log in to the same account at both ends, record the contents and reminders, and realize multi-terminal cloud synchronization.