Tweek is a weekly planner and to-do list that looks like a paper planner: one column per day, plus Someday lists for everything without a date. Write "Call the dentist" on Thursday, drag it to Friday when the week changes, and your Google Calendar meetings sit right beside it. Add notes, subtasks and reminders, repeat tasks every week, and share a calendar with your family or team. Tweek syncs with Google Calendar, Outlook and Apple Calendar and works with Apple Reminders and calendar links (.ics). Plan from ChatGPT or Claude through the Tweek apps and MCP server, or build on the REST API. Web, iPhone, iPad, Android and Mac. The free plan has no time limit; Premium is $5.99 a month or $49.99 a year; Family covers up to 4 people for $9.99 a month or $89.99 a year.