An app for counting the omer, you can choose as Ashkenaz, Sefard or Edot Hamizrach,

Today Omer count is updated according to the time of sunset in your area the location services on your device is required, if the access is not approved the update will be according to the sunset in Jerusalem.

In addition, the app gives alerts - a reminder to count the Omer count, if you do not select an hour, the alert will be received at sunset.