TezLab made sense of what your car was trying to tell you.
Your Tesla or Rivian records everything — every mile, every charge, every kilowatt. TezLab is the #1-rated companion app for both, running on millions of cars, that turns all of it into a few answers people actually care about. We helped build the part that does the figuring.
A car throws off a huge amount of data, and almost none of it means anything to the person driving. Range, charging cost, efficiency — it's all in there, but raw telemetry never answered the one thing owners actually ask: how am I doing? And "battery health" is the question everyone wants answered honestly — Tesla doesn't publish it, and no app can actually calculate it from what the car exposes. We had to build something useful without pretending to know more than we did.
“We weren't trying to show you everything. We were trying to show you the one thing you'd actually want to know.”
We built the Car Report — a single Car Score that turns years of driving into one number, benchmarked against similar vehicles. Underneath it: a Range Performance trend that tracks what the battery actually delivers over time, a Drive Details view that scores every trip's efficiency against the fleet, and a charging map that learns your routine instead of asking you to build one. The data was the easy part. The hard part was deciding which few numbers were worth showing — and being straight about the ones we couldn't prove.
Most of what the car reports never made it in. These three screens are what did.
