Notability
https://gyazo.com/a94fd4fa2d6ca792a3a73449b5a330c7
「Notability」をApp Storeで←iOS用（iPhone、iPad用）
https://gyazo.com/7c881f53b35dc6ffb4631f64263c3ec4
「Notability」をMac App Storeで←Mac用