What you get
The numbers a builder needs before buying a single part, for e-scooters, e-rickshaws, three-wheelers, ojek and xe ôm, vans and cars.
Four motors, one vehicle
NdFeB, rare-earth-free ferrite, induction and axial flux, sized for your targets. Diameter, length, weight, magnet, cost and range, drawn to scale.
Real driving, your route
WLTC, India's MIDC and IDC, ECE R40 for motorcycles, or upload a GPX from your phone. Hills and stop-and-go traffic are included.
A build sheet you can use
Winding, controller rating, fuse and cable sizes, gear ratio, battery pack layout and a parts list with local-currency costs, in one PDF.
Converting a petrol scooter or a CNG auto?
Enter what your vehicle uses today and your local fuel and electricity prices. Rotorly shows the yearly saving, how many months the conversion takes to pay back, and the CO₂ difference.
- Turns per phase / parallel paths
- 44 / 4
- Wire
- 2 × Ø1.0 mm
- Controller rating
- 120 A rms
- Main fuse
- 80 A
- DC / phase cable
- 10 / 16 mm²
- Gear ratio
- 12.2 : 1
- Battery pack
- LFP 15s2p
✓ Cells can supply the peak current
Plans
The free plan sizes your own vehicle. In the demo, Pro and Ultra are shown with sample projects. Waitlist members get the launch price.
Free
US$0- Four motor types side by side
- Drive cycles and range
- Scaled motor drawings
Pro
US$4.99 / monthEverything in Free, plus:
- 2 build sheet PDFs a month
- Your own GPS route
- Your own motor size
- Versus your current vehicle
Ultra
US$9.99 / month or US$99.99 / yearEverything in Pro, plus:
- 20 build sheet PDFs a month
- 3D exploded model with realistic view
- Supplier searches for every part
- Saved projects
- Build sheet with your logo
- Conversion report for customers
Launch prices. Subscriptions can be cancelled at any time.
Join the Pro waitlist
One email when Pro launches, with the early price. No spam.
Questions
How accurate is it?
Rotorly is for early concept sizing, typically within ±20%. Its models are calibrated against published motors and our own field simulations. It does not replace detailed electromagnetic, thermal and mechanical design, or testing.
Does my data leave my phone?
No. All calculations, including your GPS route, run in your browser. Only the waitlist form sends data: your email and the answers you choose.
Which languages?
The app is in 11 languages: English, Español, Português, Français, Deutsch, Nederlands, Русский, हिन्दी, Türkçe, Bahasa Indonesia, Tiếng Việt.
Can I install it on my phone?
Yes. Open the app, then use "Add to Home screen" in your browser menu. It works offline after the first visit.