Disappointing
A bit of a disappointment, since it requires a lot of work (by having to implement all the spells on your own) even for having a low price. Other Apps like "Spells" for Pathfinder do a much better job here. At least a prefabricated spellbook containing all the official spells and being updated with official material (Elemental Evil) should be offered or already being implemented. Also there should be a function to create several presets of spellbook, containing specific spells for each individual character, suitable for users, who play several campaigns simultaneously. Even if this would make the app more expensive (up to 2.99€) this would make it a lot more enjoyable. Also it does not work with dropbox in combination with iOS. Although doing as shown in the tutorial the app does not find the file.
the_move about
5E Spell Book, v1.9