0-maintenance cost cloud-native gym management software
A friend of mine runs a small gym in a small town. The business is doing well, so about a year ago she asked me to help her automate membership management, as doing it the good old way (with pen and paper) was error-prone and time-consuming. I designed a simple self-managed AWS app: a UI in basic HTML/CSS/JS served via S3 and CloudFront; a single-table DynamoDB persistence layer; and AWS Lambdas handling the business-logic layer. The performance is great, it's always available, and most importantly for such a tiny business: $0/month infra cost. Amazing times for small companies!