The cross platform framework needs to support to following features:

• Native code interop
• Good hardware interop support
• Build system to ensures long term reproducibility

Possible frameworks are:

• Flutter
• React Native
• Ionic

ipfs-nucleus will need to be transpile or integrated using go-mobile.

Native bindings will need to be created for:

• Android
• iOS

For the mobile implementation to make sense offline capabilities will need to be considered.

Ideally this should be real p2p. - Adhoc Wifi, bluetooth and/or mdns.

This could be achieved using a local peergos instance running on the device.
For this to be "safe" libp2p will need to ensure better privacy.

To reduce the code that needs to be duplicated, the mobile implementation will need to have a mechanism for interacting with java code.

A sandbox for thrid party content must be implemented.

A webview would likely be the best solution.

The current api needs to be extended to provide the ability to interact with native functionality, like camera, notification, gps, media player and anything that might be useful.