SendRecurring - SendRecurring allows you to setup, send, and maintain scheduled email reminders.
Huawei Mobile Services - Huawei Mobile Services app comes up with features to help you in accessing a large number of advanced features such as payments, push notifications, and Huawei ID, etc.
Recurrr - Send recurring emails
Pushbullet - Pushbullet - Your devices working better together
FollowUpThen - The simplest way to schedule an email reminder
KDE Connect - Integrate Android with the KDE Desktop