I dont really care for the limits of free accounts as an annual pro subscription is about $25 in Poland. So everyone who can afford an iPhone or iPad should have no problem with spending a handful of dollars on a subscription. But what gets me is the horrible user interface on the iPad. You cant find stuff easily. Selecting notebooks for offline access takes literally one click for each notebook you want to download. The editor is quirky. The whole app feels like a bad website. Please improve the iPad app!