Yarun
Yarun plans only two days: today and tomorrow. Each evening you set up tomorrow; when your day starts, that plan becomes Today.
You build a day from blocks. Things you do often stay in your library, ready to drag into any day; one-off tasks wait there until you place them.
Optionally, you can connect your Google Calendar: Yarun only reads your events and shows them next to your plan, so you can plan tomorrow around your meetings. It never writes or sends anything.
Want to try it? Join the beta on TestFlight.