This app was mentioned in 8 comments, with an average of 1.38 upvotes
While not what you were asking, I've found both of these apps really useful.
https://play.google.com/store/apps/details?id=com.analogcursor.spellbook
https://play.google.com/store/apps/details?id=com.sixdeight.companions
That's the one I find has fewer sorting options but better performance.
This one has better sorting options but seems to have some lag to it, on my phone anyway.
Spellbook.
Does not contain spell data, but there is a link to find it. It's for copyright reasons.
Can also be used for custom spells, if you feel like getting into building them.
Compainions.
Gives you a list of all current familiars, druid wild shapes, and ranger pets.
This one does include the info, and I'm not sure if it'll be pulled for copyright violation or not. So get it while it's there.
Yes, that first thing is one of the most useful apps I know.
Personally I prefer https://play.google.com/store/apps/details?id=com.analogcursor.spellbook&hl=en for spells.
This spellbook is pretty good
Still awaiting iOS release but here's Android. https://play.google.com/store/apps/details?id=com.analogcursor.spellbook Feel free to PM me if you have any questions.
I have it out on the play store now. https://play.google.com/store/apps/details?id=com.analogcursor.spellbook Feel free to PM me if you have any questions.