+1 for thrustcurve.
setting up an account is fairly easy & straight forward,. then, enter in your rocket fleet, and you have all you need.
Even better, is downloading the cvs data and creating a fancy spreadsheet with all the pertinent info at your fingertips.
I've purged all but the AT motors, as that's what I fly. I've made a fancy table sorted by motor size. I then have delay, max alt, max G, max velocity, etc.. for that motor. (I've even recently added case sizes, so that I can see what I can fly is another case is begin used!) plus chute size, rocket length & dia, so that filling out flight cards is quick & easy*. I can then tweak the Cd value to 'fine tune' the exact calculations it does to get a better / more accurate table.. I no longer need my phone or device or a link to the interweb.. paper, its old-school, but it works!
* our club has editable PDF flight cards. SO, I've filled out a few & saved them for my more common flyers. Complete with name, location, rocket name, colour, length dia, etc.. I also have a sheet of labels with my name, cert level, NAR No. home city & province, so that, again, filling out flight cards is simple & quick..