Telemetric.io is a free service that keeps track of any value in MySQL. Track anything - from product revenue and user churn, to total reservations and average test scores. Remotely connect to your database and start tracking any value (metric) in seconds - creating beautiful graphs that you can embed on your own website.
I personally use Telemetric.io in my freelance work to keep track of metrics for different web applications.
For example, for a local comedy club website I keep track of ticket sales, reservations, user accounts, the works. For another larger video streaming platform I keep track of some more obscure metrics, like how many videos got processed that day, new devices added, etc. These types of things are more difficult to track with typical solutions like Google Analytics and whatnot, as they tend to accrue on the backend of complex applications.
I hope this tool can be helpful to anyone who works with MySQL data on a regular basis - or at a minimum, at least it will be interesting to build up a data history and watch your metrics grow over time.