5 Best AI Design Tools for Great UI: I Redesigned a Legacy Banking App Screen
1. First outputs under identical conditions
The experiment avoids favorable setup and exposes the initial judgment of all five tools as it is.
- The test starts with an outdated mobile banking account screen
- Weak balance hierarchy, a dense transaction list, no clear primary action, and dated styling become the redesign brief
- Flowstep, Google Stitch, v0, Lovable, and Figma Make receive the same screen and prompt
- Each tool is judged on its first generation without follow-up prompts or cherry-picking
- The comparison covers information structure, contextual understanding, and visible errors alongside visual polish
2. Why Flowstep came out ahead
Its result felt less like the prettiest screen and more like a redesign that understood the product context and could move into the next stage.
- It prioritizes the balance and places transfer and add-money actions within thumb reach
- A next-bill date and amount, neither requested in the prompt, add useful financial context
- Transactions are rebuilt with category icons, cleaned-up merchant names, and color-coded amounts
- Editing and handoff continue in the same workflow after the first generation
- Multiple layout variants, direct editing, real-time collaboration, and editable Figma layers are supported
- React, TypeScript, and Tailwind export is paired with MCP connections for Cursor, Claude Code, and Windsurf
3. The other tools point toward different destinations
The strengths split depending on whether the next step is a design file, production code, or a working application.
- Google Stitch produces a solid draft with a dark theme and transactions grouped by date
- It preserves the original content model well but adds less new UX reasoning and has free-tier screen limits
- v0 is the most engineering-friendly, with income and spending summaries plus clear component boundaries
- It moves naturally into React code but relies on a familiar and somewhat generic fintech dashboard pattern
- Lovable adds useful context such as a 30-day spending summary, but its bottom navigation overflows the viewport
- It suits fast working-app prototypes, provided that visual and responsive QA follow
- Figma Make preserves the existing brand and functionality most faithfully
- It fits a Figma-centered redesign workflow, though it does less to reinterpret what users need
4. Tool choice diverges after the generated image
The lasting criteria are the cost of revision and how the output connects to the team workflow.
- A practical comparison should cover context fit, editability, responsive reliability, and handoff
- Flowstep favors collaboration and engineering delivery, v0 favors the codebase, while Stitch and Figma Make favor quick exploration
- The author’s overall verdict places Flowstep closest to a screen that could actually ship
- Its prompt-beyond UX reasoning works together with a direct editing and code-delivery path
- A single-prompt result is a signal for narrowing candidates, not a final ranking
- Screen complexity and iteration change the outcome, so the tools still need to be tested on your own product screens
