Memo is described as 'Beautiful history-based notes app built with iOS design guidelines in mind. Additions and deletions are automatically stored in the history timeline, which can be scrubbed to travel forwards and backwards in time through the note' and is a Note-taking tool in the office & productivity category. There are more than 100 alternatives to Memo for a variety of platforms, including Windows, Mac, Android, iPhone and Web-based apps. The best Memo alternative is Notesnook, which is both free and Open Source. Other great apps like Memo are Zim, CherryTree, Trilium Notes and Cryptee.