The best recording accelerometer is the DA-55 from
Spruce and Specialty I just have a mechanical g meter in my current airplane with a bracket on it so pilots cannot reset it without a spanner. In a previous life I've used a DA-55 and its good to be able to get the full history with date and time of high g levels.
I tell pilots that anyone who pulls more than 6g in my Decathlon has bought the wings.