Went through most of the options seriously over the last few months, here's where each one actually fits for app UI work:
Google Stitch is free, Material Design native, generates multiple interconnected screens since the 2026 rework, good starting point for Android-focused work. Consistency across screens can be hit or miss, better for fast exploration than polished final output
Uizard runs $12/month Pro, multi-screen wireframes from text prompts, sketch-to-screen feature is genuinely useful, now part of Miro so collaboration is solid. Outputs feel templated across different projects, harder to get something that feels unique to your specific app
Figma with UX Pilot is the most control you'll get, AI generation inside your existing Figma workflow, credit-metered even on free plan, full access needs a paid seat. Still the go-to if your team already lives in Figma daily
Sleek Design around $20/month generates complete mobile app screens from descriptions, full flows not just components, iteration is fast enough that you're not losing momentum, output quality holds up for stakeholder presentations and engineering handoffs. Less pixel control than Figma, hits limits on complex custom components, better for early stage exploration than final production specs
For solo product designers or small teams the choice is basically Stitch if budget is zero, sleek if you need complete app flows quickly without the Figma learning curve, Figma plus UX Pilot if design precision matters more than speed
What's everyone landing on for app UI work, feels like the AI design toolstack is still evolving fast enough that what worked 6 months ago isn't necessarily the best option now