Build robots without limits
for $9 once.
Unlimited builds, full CAD downloads, multi-file firmware exports, priority Gemini tokens, no rate limits on the Feasibility Lab. Pay once. Keep forever.
Unlimited builds
Free tier caps at 5 saved builds. Pro keeps every build forever, with shareable URLs that never expire.
Full OpenSCAD CAD download
Free tier shows a CAD preview but locks the source. Pro downloads the full editable .scad file + server-side STL compile for any build.
Multi-file firmware ZIP
Free tier shows a single firmware starter. Pro exports the full project (drivers/, safety.py, requirements.txt, platformio.ini) as a ready-to-flash zip.
Priority Gemini token budget
2× the token output for build generation, feasibility runs, and tweaks. Pro hits 12,000 tokens; Free uses 6,000. Bigger BOMs, deeper firmware, no truncation.
Unlimited Feasibility Lab runs
Vision-based feasibility with Gemini 3 Vision is rate-limited to 15/min on Free. Pro removes the cap entirely.
Builder tweak streaming
"Make it 3× quieter" / "Add night vision" — Pro tweaks the BOM in place at faster rate-limit tier.
Pro-only weekly digest
A second weekly email separate from the public digest, with deeper engineering notes, vendor backchannels, and the addon roadmap.
Lifetime, no subscription
Pay once. Keep forever. No monthly billing, no credit card on file, no auto-renewal trap.
One-time, lifetime, per device. 30-day refund.
Free vs Pro
| Feature | Free | Pro |
|---|---|---|
| Saved builds | 5 | Unlimited |
| BOM generation tokens | 6,000 | 12,000 |
| Feasibility Lab runs/min | 15 | Unlimited |
| OpenSCAD CAD source | Preview only | Full download + STL |
| Firmware export | Single file | Multi-file ZIP |
| Build tweak streaming | Standard tier | Priority tier |
| Shareable URLs | 30 days | Forever |
| Weekly Pro digest | — | ✓ |
What makers build with Pro
A few addons in the catalog — fully exportable with Pro.
Universal magnetic charging dock for quadruped robots
Wall-mounted dock with magnetic alignment, 5A USB-C PD output and a contact pad that fits Unitree Go2, Spot and Anymal. The robot drives onto the pad and charges without a tether.
Modular MOLLE payload tray for quadruped robots
Aluminum tray that mounts to the robot's spine hardpoints. MOLLE webbing on the sides for tool attachments, two Picatinny rails for sensors, threaded inserts for custom mounts. Up to 3kg payload.
Pet companion module for quadruped robots
A removable rear-mount module that turns a quadruped robot into a temporary mate-stand-in for pets that have residual mating instinct after spaying/neutering. Anatomical silicone insert, body-temperature heating pad, dog-appeasing pheromone reservoir, self-cleaning cycle when docked.
Common questions
Lifetime really means lifetime?
Yes. One $9 payment, no subscription, no auto-renewal. The upgrade is tied to your device cookie — if you clear cookies you'll need to log back in (we can reattach your purchase via email).
What if I'm not happy?
30-day no-questions-asked refund. Email apps@brainystack.co with your PayPal transaction ID and we'll reverse the payment. We track refund rate publicly; it sits at under 4%.
Why $9 specifically?
Cheap enough to skip the deliberation, expensive enough to filter for serious builders. The pricing matches what you'd spend on one ESP32 + driver — not a hard decision when you're already building.
What does NOT come with Pro?
We don't sell the parts (you buy those on AliExpress at the live prices we show). We don't physically print or ship CAD (you do that locally or via online services). We don't do commercial licensing — for that, contact us separately.
Does Pro work across multiple devices?
Yes — your purchase reattaches via email. Just check the 'Email me a copy of the receipt' box at checkout. We bind the upgrade to that email; subsequent device sign-ins work.
One $9 payment. Forever.
Stop counting builds. Get your CAD source. Export your firmware. Make it.
Upgrade now — $9