What's wrong with a good old paper record? Unless you're trying to use a program to extrapolate data, just writing the stuff down will suffice. I'm on, like, my fifth notebook. I've been flying since 1986.

A simple table shows me date, model, engine, # of flights, and total airframe/powerplant time (i.e., how long the engine runs, from crank to shut-down on each flight, per session). A Remarks Section covers any additonal info needed.