Built by one lifter who was tired of guessing.
CernoFit is made by Derek, a solo founder. It started as a form-correction experiment and became a coach in your pocket: a camera that times your reps, notices when you slow down, and writes the next set. The product is small on purpose. It measures what it can, says what it cannot, and never dresses up a number.
The whole thing, from the camera tracking and the estimates to the program builder, both apps and this site, is one person's work. That is a limit, and it is also why every number on these pages is either measured, worked out and labelled as such, or clearly an example.
Measured before inferred
Anything the camera saw is shown in plain white or black. Anything the app worked out from it is purple. You always know which you are looking at.
No guessing
A lost bar, a bad angle, a two-rep set: the app says so instead of inventing a number.
Motion only on data
Numbers roll, bars grow, a line draws itself. Nothing else is decorated with motion.