Mindspace is described as 'makes it easy to remember things. Users can capture thoughts and ideas as notes, audio streams or sketches and access them from anywhere at any time' and is an app in the Office & Productivity category. There are more than 100 alternatives to Mindspace for a variety of platforms, including Windows, Android, iPhone, Mac and Online / Web-based. The best alternative is Joplin, which is both free and Open Source. Other great apps like Mindspace are Standard Notes (Freemium, Open Source), Microsoft OneNote (Freemium), Evernote (Freemium) and Simplenote (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.
Todoist is a task manager thats useful, fast and easy to use. Accomplish more, every day. Millions of people rely on Todoist to get things done. Todoist lets you manage your tasks anywhere. At home. At school. At work. Online. Offline. And on 13 platforms and devices.