Ok let try to answer in english
Android or IOS ?
Android > you can test everything you want, export, test, play on your phone > free > then when if you want to push your app on playstore you have to pay an account > 25$?.
IOS and apple, > you have to pay FIRST , and then you can develop...and test on your phone > not fairplay!!!
You can develop your app with android exporter and when it's ready, push it on IOS ... just have to respect portability...
Think about it.