Software Development & Technology
Building Solutions. Creating Legacy.
Boutique software development — mobile apps, web platforms, and AI, built to last.
Boutique software development — mobile apps, web platforms, and AI, built to last.
SJK & Sons LLC® is a boutique software development company based in Wallingford, CT. We design and build mobile applications and web platforms that solve real problems for real people.
We approach every product the same way we built our own: with obsessive attention to detail, deep domain research, and a commitment to getting it right — not just getting it done.
Our flagship product, GritLeanPulse, launched on the App Store in July 2026 — 264 mobile screens, 264 web dashboard tools, Apple Watch app, 18 home screen widgets, 32 languages, and AI on every screen. The most comprehensive health & wellness platform ever built for iOS.
Complete, production-ready products — mobile app, web dashboard, backend, and AI — from a single team.
The most comprehensive AI health & wellness platform on the App Store — live July 2026. 264 mobile screens + 12 Apple Watch screens covering nutrition, GLP-1 management, women’s health (28 screens), men’s health (26 screens), 32 condition-specific nutrition programs, mental wellness, biohacking, habit tracking, biological age, and advanced biomarker tracking. AI SmartInsightCard + floating AI coach on every single screen. No other health app comes close.
More products in development — building the future of health technology.
From concept to App Store — we handle the entire stack so you don’t have to hire five teams.
Native iOS apps built with React Native and Expo. Apple Watch integration, HealthKit, push notifications, App Store submission — end to end.
Production-ready web dashboards and SaaS platforms built with Next.js and Supabase. Real-time data, authentication, responsive design.
Claude-powered AI companions, food recognition cameras, voice logging, automated analysis, and custom AI endpoints built in from day one.
Deep expertise in HealthKit, biomarker tracking, GLP-1 management, CGM integration, wearables, and clinical-grade feature sets.
White-label platforms and clinic-connect features for healthcare providers, wellness businesses, and health tech companies.
App Store positioning, pricing architecture, RevenueCat billing setup, go-to-market planning — not just code, but a product that sells.
Have an idea for an app? Ready to take your product from concept to launch? We’d love to hear from you.
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