You can send the SMS message using Amazon SNS. If you want to use this to send the message, Amazon has provided an AWS SDK called boto3. The message can be stored by using any RDS-compatible database engine (PostgreSQL, Aurora, MySQL, etc.). Amazon RDS simply provisions the servers that will run this software. If you are planning to make a web app for the dashboard, a framework like Django would be a good choice. Then you could use something like Django Channels for the real-time requirement.