Rune had a good suggestion where you calibrate slot 0 in the NanoVNA for the maximum frequency range you would ever need and then leave it that way and use the other slots for other frequency ranges you might want.
Then you can calibrate for the desired range you want in NanoVNA Saver using the number of segments (more data points) and degree of averaging that you want. Now the two calibrations (hardware and Saver) are independent and the saved calibrations in NanoVNA can be recalled and used as long as the nanoVNA is set to slot 0 (power up default).
I tend to use NanoVNA app by OneOfEleven when I want to use the PC. More features than Saver, easy calibration, more graphs, better scaling (which is easier to use) and up to five traces at a time.
Roger
Roger Need