IHave heard so many wonderful things for Pattern keeper, but now it’s only available for Android. I have Ipad so I am hoping they come out with an IPad version. Look on You Tube lots of tutorials for the learning curve. Good luck. Happy stitching
I used to use Goodnotes - but now there is a new app for IOS which I have been using and really enjoying! Its called Markup R-XP it looks and does very similar stuff to the Android App Pattern Keeper. Would definitely recommend! They even give you a really good free version, so you dont have to pay for the full price App.
I finally tried Patternkeeper, and it is a game-changer for me. Ive been stitching for years, but always from paper patterns, marking things off with colored pencils or highlighters. I tried the demo on a whim and Im absolutely hooked. It has totally changed the way I stitch: its faster (since I can just highlight all the stitches of one color so I dont miss them), and I dont have to worry about page boundaries. It took me a little bit to get used to looking at a lit screen, but I wont go back to paper unless I have to. THis was one of the few apps that I immediately thought "where have you been all my life!".
I use Pattern Keeper (Android). I really like it. Simple to use and a month free trial.
There is also Mark Up- RXP (I think). Its available on all platforms I believe, it has a learning curve (still learning) but you can use charts from any source available.