I use SkySafari when observing, either with push-to encoders or to get alt and az when using just a Wixey. Since I use it on an iPhone 7, the screen size leaves a lot to be desired, but I really don't want to carry around a tablet as well.
For planning, I use the Cambridge Atlas, Jumbo Pocket Atlas, or my field edition Atlas 2000. I'm in heavy light pollution so the 2000 goes a lot deeper than what I need at home. I've downloaded a number of the free online atlases, but I always end up printing out the charts which is not that convenient either. The Jumbo is probably the best compromise for me.
If I could find a suitable mount, I'd probably go back to using RA and Dec circles like when I started in this hobby decades ago. Otherwise, I'll keep searching for the sweetspot among atlas, etc.