OurDays is described as 'elegant journal with well-design interface. You can keep your daily activities, feeling, and ideas by photos, voice recordings, texts, locations, and tags' and is a Note-taking App in the Office & Productivity category. There are more than 50 alternatives to OurDays for a variety of platforms, including iPhone, Android, iPad, Online / Web-based and Windows. Most alternatives are Note-taking and Journaling Apps. The best alternative is Joplin. It's not free, so if you're looking for a free alternative, you could try Standard Notes or Evernote. Other great apps like OurDays are Simplenote (Free, Open Source), Zoho Notebook (Free Personal), Cryptee (Freemium, Open Source) and RedNotebook (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.
RedNotebook is a graphical diary and journal helping you keep track of notes and thoughts. It includes a calendar navigation, customizable templates, export functionality and word clouds. You can also format, tag and search your entries.