I don't know if you share the same view or not but many people say that using technology, word editors and other online writing platforms that provide automatic spelling correction weakens our spelling skills and increases the chances of making spelling mistakes once using a paper and pen more than ever before. Well at least from my own experience as a blogger and having to always write three articles per day I do depend a lot on auto-correction and still I would get emails from people saying there are some typing ( not spelling ) mistakes in my posts ( I am sorry about this but my time constraints do not permit me to scrutinize every word I type in and I am sure you understand it ).
Just to make things clear , typing mistakes are different from spelling mistakes, the latter are linguistic kind of errors and are consciously done . They are mostly attributed to a lack of proficiency in the writing skill but the earlier are unconscious and are due to mistyping. When you watch your students or even kids typing you will instantly know what kind of mistakes they make. The first type is not a big deal , a little attention is enough to rectify it but in the second case, they need to practice writing and probably engage in a rigorous process of dictation and word formation to redress the situation.
To help you improve your students spelling capabilities, I compiled a list of some great iPad apps that can perfectly do the job . Check it out
1- Spelling Made Simple Lite
Help Wordy the frog build a beautiful magic garden by spelling words correctly.