fold_kit 0.0.1

Foldable and large-screen toolkit for Flutter: fold position, posture, hinge angle and iPhone Duo-style vertical bars.

fold_kit

Foldable and large-screen toolkit for Flutter. Know where the fold is, how the device is held and which window size class you are in, on iPhone Duo, Samsung Galaxy Z Fold, Google Pixel Fold, flip phones, tablets and iPad. Build adaptive, responsive, dual-screen layouts that never put a button on the hinge.

Docs and device list: monsware.com/foldkit

One API for every device and platform

Write your layout once. fold_kit answers the same questions everywhere, so the same code runs on a phone, a foldable, a tablet, the web and desktop:

Device	Fold position & posture	Window size class
Samsung Galaxy Z Fold / Flip, Pixel Fold, other Android foldables	✅	✅
iPhone Duo (iOS 27.1)	🔜 0.1	✅
iPad, Android tablets	— (no fold, reported as none)	✅
Phones, web, macOS, Windows, Linux	— (no fold, reported as none)	✅

Other packages cover one device (for example only iPhone Duo). fold_kit is cross-platform by design: one FoldInfo, one set of widgets, every platform.

What works today (0.0.x)

import 'package:fold_kit/fold_kit.dart';

final fold = FoldInfo.of(context);

fold.hasFold;          // a fold or hinge is in view
fold.rect;             // where it is, in logical pixels
fold.axis;             // FoldAxis.vertical (book) or .horizontal (tabletop)
fold.posture;          // none, closed, halfOpen, flat
fold.windowSizeClass;  // compact (< 600), medium (< 840), expanded

Fold data comes from Flutter's MediaQuery.displayFeatures, which Flutter fills on Android foldables today.

Coming in 0.1: less code for adaptive layouts

• iPhone Duo: the fold and posture on iOS 27.1 (Flutter does not report them on iOS yet).
• FoldScaffold: app bar and tabs move into a vertical bar on the right, like system apps on iPhone Duo.
• Hinge angle stream (iPhone Duo, Android foldables).
• FoldTwoPane and FoldAvoid: split at the fold, keep buttons off the hinge.
• A live device catalog of current foldables and test helpers for every posture.

Keywords

Flutter foldable · iPhone Duo · Galaxy Z Fold · Pixel Fold · hinge · dual screen · two pane · adaptive layout · responsive layout · window size class · tablet · iPad.

Issues and ideas: GitHub.

About the author

Made with ❤️ by Muhammed Şamil Demir, Flutter & iOS developer and founder of Monsware. Free and open source (see LICENSE).

• 🌐 Website: monsware.com · GitHub: @msaadev
• 📱 Apps by Monsware: Triangle Calculator · Circle Calculator
• 📦 More Flutter packages: awesome_stepper · regex_ui · fold_kit
• 💼 Need a Flutter or iOS app built? Get in touch

If this package saves you time, a ⭐ on GitHub and a 👍 on pub.dev help a lot.