THE FIELD NOTES

iPhone Duo guides for the new screen.

Practical iPhone Duo guides, from choosing an app to checking how it behaves. Read the answer first, follow the source, then try a clear task.

Everyday use3 min read

Two apps, two windows, or two panes? Start with the difference.

Before you install3 min read

Compatible, adapted and actually tested are different claims.

Everyday use3 min read

Start with a task that needs two things in view.

Screen & video3 min read

Empty space can preserve the picture. Here is how to tell.

Hands-on preparation3 min read

A small, repeatable test says more than a “works great” badge.

For developers3 min read

Review the assumptions that break when an iPhone can resize.

Beyond the fold5 min read

Start with the screen you have, the video you want, and a check you can actually repeat.

Everyday use6 min read

Apple documents the resize across poses. It says nothing about what your app remembers.

Everyday use5 min read

The smaller screen runs apps. It does not create windows.

Everyday use6 min read

Apple gives a rule for same-app windows, not a list. Here is how to apply it.

Find your next app.