Notesnook
8.8#6 in note-taking appsFrom $1.99 a monthFree planAndroidiOSWebLinux
VisitNotesnook suits people who want encrypted notes across desktop, mobile, and web, including users who need note sharing or inbox integrations. Its free plan may suit users comfortable with monthly attachment and file-size limits.
SecNotes may suit Android users who want to keep personal notes, checklists, and spreadsheet-style information together. It also offers browser access and shared editing for cloud-backed notes.