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 Connecticut. 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 — 384 mobile screens, 384 web dashboard tools, a 15-screen Apple Watch app with workout tracking, 25 tappable home screen widgets, a Control Center control, a fasting Live Activity, 34 languages, and AI powered by Claude (Anthropic) built into the experience, including an Ask My Coach that can log for you and read replies aloud in a natural on-device voice. A comprehensive health & wellness platform built for iOS.
Complete, production-ready products — mobile app, web dashboard, backend, and AI — from a single team.
A comprehensive AI health & wellness platform on the App Store — live July 2026. 384 mobile screens + 15 Apple Watch screens (start a workout from your wrist with live heart rate and calories), 25 home screen widgets that open the matching screen, a Control Center control and a fasting Live Activity, covering nutrition, GLP-1 management, women’s health (34 screens), men’s health (27 screens), 88 condition-specific nutrition programs (trackers), environmental health (cosmetics, air quality, water & clothing safety scanners), mental wellness, fitness & competition prep, biohacking, habit tracking, biological age, and 117-biomarker lab tracking with trend charts and retest reminders. Also includes a full strength-training log (per-set logging, routines, CSV import, live personal records, strength logging on Apple Watch), multi-week workout programs, micronutrient tracking from your food log, and data export & import. A built-in eating-disorder-safe mode hides calorie and weight-loss numbers. AI SmartInsightCard + floating AI coach on every single screen. Pinch-to-zoom on all 384 screens. A dedicated Clinic Connect B2B layer lets weight-loss clinics and GLP-1 providers enroll and manage patients directly inside the platform, with a staff-facing Clinic Portal for rosters and outcomes, plus a Coach Connect layer for gyms, personal trainers and nutritionists. Start a 14-day free trial on any annual plan, or choose a monthly or quarterly plan. GritLeanPulse is a consumer wellness app, not a medical device.
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 in-depth wellness feature sets.
Live in production on GritLeanPulse: clinic-code patient enrollment, a staff-facing Clinic Portal with rosters, a daily worklist, shared inbox and reports, secure messaging, and program tools for weight-loss clinics, GLP-1 prescribers, gyms, personal trainers, nutritionists and wellness businesses.
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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