OhDontForget.com is a website that can alert you via text messages and you can schedule messages as per your needs, this way you tend to forget things lesser (we hope so).
This is what they have to say about themselves: The easiest way to schedule SMS reminders for yourself, your family, friends or customers.
Here’s the OhDontforget Pricing:
You can follow this link to add your number to the blacklist: https://ohdontforget.com/blacklists/new
or you can text this:
To remove yourself from the blacklist, text in ODF to (716) 259-2557.