The combination of Flutter + Claude Code makes cross-platform app development really, really fast. I've been impressed with how well Clause handles prompts like, "This list should expand on the web, but not on iOS." I then ask it (Claude) to run both a web instance and an iOS simulator instance. Can usability test in-tandem.

I recently (as in, last night) added WebSockets to my backend, push notifications to my frontend iOS, and notification banner to the webapp. It all kinda just works. Biggest issues have been version-matching across with Django/Gunicorn/Amazon Linux images.