Design free. Pay when you’re ready to build.

No account needed to start. You only pay when a layout is worth turning into exact measurements and a construction PDF.

Free

Design and compare layouts — no account needed

$0
Start Free
  • Straight, quarter-turn, and half-turn stairs
  • Live 2D + 3D drawings
  • Blondel comfort optimization
  • Comfort grade (0–100 score)
  • mm or inches
  • Shareable URL for each design
  • No registration, no time limit
MOST CHOSEN

DIY Pass

One project, 72 hours, everything unlocked

$19
  • Everything in Free
  • Exact measurements revealed
  • Construction PDF export
  • Cut-list starter with dimensions
  • Build-review checklist
  • 72-hour access from purchase

Pro Monthly

Unlimited projects, all exports

$29/month
  • Everything in Free
  • Unlimited unlocked measurements
  • Unlimited PDF exports
  • Individual step detail plans
  • DXF/CAD export (coming soon)
  • STL/OBJ export (coming soon)
  • XLS cutting list (coming soon)
  • Cancel anytime, keep your PDFs

Pro Annual

Best value — 2 months free

$249/year
  • Everything in Pro Monthly
  • 17% cheaper than monthly
  • Priority support

Common Questions

Can I cancel anytime?

Yes. Pro Monthly cancels instantly, no penalties. Pro Annual has a 14-day full refund window.

What payment methods work?

All major cards (Visa, Mastercard, Amex) via Stripe. Your card details never touch our servers.

What if I’m not happy?

14-day refund guarantee, no questions asked. Email us and we’ll process it same day.

Is the free tier really free forever?

Yes. Unlimited designs, unlimited edits, no time limit. You only pay when you want exact build measurements and PDF exports.

What happens after the 72h DIY Pass expires?

Your designs stay in the URL. You just lose access to exact measurements and PDF export. Buy another pass anytime you need it.

Your staircase plan is 5 minutes away

Start free. Unlock exact build measurements only when the design is worth keeping.