Writing is not natural, but combination of writepad is great idea – Underscore Notify Review

Need to improve writing tactility. However, writepad, in-app is great combination. But I had one question. Before I bought 'Notify', I'd already had Writepad and when I bought writepad(in-app), I saw the pop-up about my purchasing history of writepad. So I thought I won't need to paid again for writepad. Am I wrong?
Review by Seong-Ho Park on Underscore Notify.