As Noted is described as 'simple and powerful personal note taking environment. You can edit and manage your notes with your iOS or Android smart phone or tablet, or on the desktop with the As Noted extension for Chrome' and is a Note-taking App in the Office & Productivity category. There are more than 100 alternatives to As Noted for a variety of platforms, including Windows, Android, iPhone, Mac and Online / Web-based. The best alternative is Joplin. It's not free, so if you're looking for a free alternative, you could try Standard Notes or Google Keep. Other great apps like As Noted are Microsoft OneNote (Freemium), Evernote (Freemium), Simplenote (Free, Open Source) and CherryTree (Free, Open Source).
Joplin is a free, open source note taking and to-do application, which can handle a large number of notes organised into notebooks. The notes are searchable, can be copied, tagged and modified either from the applications directly or from your own text editor.