All you have to do is
- pick phone numbers you wanna remind via a text
- pick email ids that wanna remind via a mail
- give reminder information
- set date and time of the reminder.
When the reminder goes SMS and emails will be sent to the respective contacts without user intervention.The user will also be notified about the reminder with the list of phone numbers and emails alerted.
In case you are not willing to give access to your email account, you still can use the app to remind using text messages alone.If there is a connectivity prob with internet at the time of reminder, only SMS contacts will be reminded.
The reminder can be edited after it is set.There is a search box using which you can pick the required contacts.
To download this app https://play.google.com/store/apps/details?id=suba.app.remind