You do not need permission to use an app on learnPad you just need to get a site licence. It is just an android tablet with a different skin and also has access to Google Play Apps. Most schools I now love them.
But the killer for me was just the limitation of Apps that was available in the Learnpad 'store'. Learnpad so say that you can ask the author's permission of an app found in the play store if you can use it on learnpad. So I asked two different authors for permission and didn't get a response so I was unable to use them through learnpad.