Side project: CloudyCharge – Get alerted when AWS usage exceeds free tier

There is already AWS billing alerts, but it runs once every 6 hours, which might be too late for some people, and the user experience is also not great. So CloudyCharge.com was created. CloudyCharge notifies, via email or SMS, whenever the cloud usage breaches free tier, within 5 minutes. CloudyCharge accesses user's cloud account via a read-only role in their account with access grant to CloudyCharge's IAM user. Planning to keep the service free forever. Currently only EC2 instance support is added, but planning to add more. Looking for early feedback. Thank you for your time!