The lesson is to be done on an iPad. But typing is difficult (on an iPad) and photos won't fit.
This lesson is for the iPad, but it's hard to type on that and photos won't fit.
例文２のように、よくソフトウエアについては「for (the) iPad」「for (the) Mac」「for Windows」とかを言います。
この２つのパターンがあります。意味は同じです。
It's hard to type on an iPad./ Typing on an iPad is difficult.
It's easy to catch a taxi in Shinjuku. / Catching a taxi in Shinjuku is easy.
新宿でタクシーを捕まえるのは簡単だ。
アメリカ合衆国 
