Work / Velox. EdTech / Maths. 2026.

A mental math app built around speed, streaks, and serious practice

Mental math training app with a 60-second challenge, Math Gym workouts, multilingual practice, subscriptions, and store-ready mobile builds.

Visit the live product

Velox: A mental math app built around speed, streaks, and serious practice
Velox. 60s challenge loop.

The brief

Velox is a mental math training product built around a sharp promise: beat your calculator, then keep improving with structured practice. The app had to work as a public web product and as a store-ready mobile app without splitting the codebase. The brief was not just "make a math app". It needed a 60-second challenge that anyone could understand, a deeper Math Gym for repeat practice, lesson progression, records, streaks, language-specific training, and a payment path that would survive real App Store and Play Store review.

What we saw

Education apps fail when the first session feels like homework and the long-term system feels like a dashboard. Velox needed both loops. The first loop is fast: a challenge, a score, a reason to try again. The second loop is durable: weak-spots training, curriculum unlocks, leaderboards, achievements, and progress records. Treating those as one product system meant the landing page, mobile shell, practice model, subscription gates, and analytics all had to tell the same story.

What we built

We built Velox as a Vite + React 19 application with Capacitor powering iOS and Android builds. Firebase handles authentication and progress data, RevenueCat handles native subscriptions, and the app uses a shared React surface for the web product, mobile shell, and marketing site. The latest release added multilingual app and training-language controls, refreshed the landing page around real app screenshots, tightened the Math Gym practice model, and made the subscription experience native enough for mobile users while still keeping the web route useful for acquisition.

Built with Vite, React 19, Capacitor, Firebase, RevenueCat, Tailwind v4.

What changed

  • 60s challenge loop
  • 50+ lessons
  • iOS + Android mobile builds

Shipped

  • Vite + React 19 product app with shared web and mobile code
  • Capacitor iOS and Android builds with native integrations
  • 60-second challenge, Math Gym workouts, streaks, records, and leaderboards
  • Progressive curriculum with 50+ lessons and practice gating
  • Firebase authentication, progress storage, and analytics surfaces
  • RevenueCat subscription flow and customer-centre integration
  • Multilingual app and training-language preference system
  • Marketing site using real app screenshots and store-ready positioning

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