## Startup showcase (1-1 of 1)

### OnKey
Learn to sing the songs you love. A free, open-source singing trainer for Mac th

343 GitHub stars (dsmurrell/onkey, MIT, 2026-10-27)

Website · Education · by dsmurrell · launched 2026-10-18. https://singonkey.app/

- Frontend: Next.js, React

Most used: Next.js (1), React (1).

**Caveats (show these word for word)**
- Stacks are read from each product's public code (manifests and environment templates) on the date shown; a service listed there may be optional or used only by the hosted version. GitHub and App Store figures are as read on their checked_at date.

Confidence: medium.

Use estimate_cost or audit_stack with the priced vendor ids to see what a stack like this costs.