VibeKaizen
Five real apps

Demos

VibeKaizen's agents wrote the code of these five apps. Try any of them in your browser; demo data resets every hour.

P1 · From a Figma design

Habit tracker

From a Figma Community design: add habits, check them off daily, a weekly summary, a 200-day streak celebration.

Model: Claude Sonnet 5.5, on the founder's own key

Platform: Web app built from phone-sized Figma screens; it looks best in a phone browser.

10 tasks · 2 sprints~$16.85 cost (~$1.69 per task)2 h 32 min agent working time

P2 · From a Figma design

Booking app

Book appointments with barbers, salons or coaches; a daily schedule for the business owner; email reminders.

Model: GPT-6.1 Sol (Codex), on the founder's own key

Platform: Web app built from phone-sized Figma screens; it looks best in a phone browser.

9 tasks · 1 sprint~$35.70 cost (~$3.97 per task)5 h 6 min agent working time

P3 · No design, from a chat

Personal budget

No design, just a chat with the product owner: categories, quick income and expenses, monthly budgets and a warning near the limit.

Model: Gemini 3.1 Pro, then Gemini 3.8 Flash, on the founder's own key

Platform: Web app for phone and desktop browsers.

6 tasks · 1 sprint~$18.25 cost (~$3.04 per task)4 h 28 min agent working time

P4 · From a Figma design

Habit tracker on the platform model

The same Figma design as the habit tracker, built without any API key, on the platform's own model.

Model: DeepSeek V4.1 Flash, the platform model (no key)

Platform: Web app built from phone-sized Figma screens; it looks best in a phone browser.

7 tasks · 1 sprint~$6.13 cost (~$0.88 per task)4 h 28 min agent working time

P5 · No design, from a chat

Neighbourhood events

No design, a chat with the product owner: publish events, filter by date and place, I'm going, add to calendar.

Model: Mixed: large tasks on Claude Sonnet 5.5, small ones on the platform model

Platform: Website for desktop and phone browsers.

10 tasks · 2 sprints~$11.40 cost (~$1.14 per task)2 h 57 min agent working time

The agents wrote the app code; the founder only answered questions, approved and gave feedback. Costs include planning: the provider's list price for roles on the founder's own key, and what the plan balance is charged at the published rate for the platform model.

Try it with your own idea

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