SidePane
FeaturedUnfold a second screen for your Mac, with touch and Apple Pencil.
Productivity · iPhone Duo app
by Cultured Code
Reshapes itself for every pose. Unfold it for a sidebar with all your lists.
iPhone Duo support
Confirmed
Checked by hand against the App Store.
Screenshots
Screenshots from the App Store. Tap one to see it full size.
On iPhone Duo
Things is a to-do and task manager. On iPhone Duo it reshapes itself for every pose: closed, open, folded like a book, or sharing the screen with another app in Split View. Unfold it and a new sidebar shows all your lists.
Yes. iPhone Duo support is confirmed in the release notes of Things 3 version 3.25, released Oct 21, 2026.
Things 3 costs $9.99 on the US App Store.
Things 3 is made by Cultured Code and is in the Productivity category.