Google’s how-to for sketch-to-app says to upload a photo of your sketch, select the Canvas tool, ask Gemini to code the app, then refine it in the preview. These prompts are our own. Treat the result as a prototype, not finished software.
Related: building location apps? See how to prompt AI Studio for map apps.
Prepare the sketch
- Draw on plain paper with dark pen, one screen per page.
- Label buttons and fields in words (“Add habit”, “Streak count”).
- Take a flat, well-lit photo.
First prompt
Can you code this app? It is a habit tracker. The sketch shows a list of habits, a checkbox for each day of the week and an "Add habit" button at the bottom. Keep the layout as drawn and make it work in the preview.Refine one thing at a time
Change the color scheme to deep green and cream, and use a rounded font.Add a streak counter next to each habit that goes up when I check today's box.Game board
Turn this sketch into a simple two-player tic-tac-toe game. Show whose turn it is and add a reset button.Checklist
- Click every button in the preview.
- Ask Gemini to list anything it assumed that the sketch did not show.
- Do not enter real personal data into a prototype.
Related: Gemini file prompts and the Gemini page.