Daymate is described as 'is powerful GTD flavoured task management for iPhone, iPod Touch and iPad' and is an app in the Office & Productivity category. There are more than 100 alternatives to Daymate for a variety of platforms, including iPhone, Online / Web-based, Android, Mac and Windows. 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 Daymate are Evernote (Freemium), Simplenote (Free, Open Source), CherryTree (Free, Open Source) and WorkFlowy (Freemium).
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.
Workflowy lets you organise your brain into easily manageable lists. It also works as a single-pane outliner with inline notes. It offers one-click hoisting (zooming into branches). The online version syncs with mobile apps.
Whether you’re between meetings or in line for a latte, use Asana to quickly capture tasks, to-dos, reminders, and ideas. Get updates from coworkers, organize tasks and projects for work, or manage your to-do list for the day.