SmartDiary

SmartDiary is a little diary application runnig on Anroid, Linux and Windows. For every day you can add a text entry. For highlighting entries you can choose between colors and symbols, every color can be labeled with a custom text. There are 13 colors available.
You can set a password and protect entries so that for viewing / modifying these entries the password must be given.
You can search in the diary for expressions. You can export the whole diary to JSON format.
It is also possible to import a previously exported json file and replace the existing datavase.