# HLT3

> HLT3 (hlt3.studio) is a software engineering studio that builds health and consumer apps such as Health3 and Unbuzz. The pages below are available as clean Markdown for AI agents by appending `.md` to the page URL.

## Blog

Technical articles and case studies.

- [Building Health3: A Personal Health Companion That Actually Reads Your Lab Reports](https://hlt3.studio/blog/building-health3-personal-health-companion.md): How we built Health3, a Flutter app that parses arbitrary lab PDFs with AWS Textract and Bedrock, then turns the structured biomarker data into trends you can actually act on. A technical case study covering Flutter, Supabase, programmatic SEO at the long-tail, and the architecture decisions that made all of it possible.
- [Building Reelry: Orchestrating a Five-Provider AI Pipeline Into One Vertical Video](https://hlt3.studio/blog/building-reelry-ai-tiktok-video-generator.md): How we built Reelry, a web app that turns a single prompt into an on-brand, ready-to-post TikTok reel. A technical case study covering Inngest-driven pipeline orchestration across Claude, Recraft, Runway, ElevenLabs, and Shotstack, brand-consistency via style fingerprinting, multi-tenant key vaults, and idempotent Polar billing.
- [Building Unbuzz: Engineering a Caffeine Tracking App That Actually Works](https://hlt3.studio/blog/building-unbuzz-caffeine-tracking-app.md): How we built Unbuzz, a privacy-first caffeine tracking app with real-time decay modeling, Apple Watch support, and on-device intelligence. A technical case study covering Flutter, Supabase, and the architecture decisions that shaped the product.

## Services

Engineering services we offer.

- [Backend Development](https://hlt3.studio/services/backend.md): Scalable backend solutions with Supabase and PostgreSQL. Real-time data, authentication, APIs, and database architecture.
- [Cloud & DevOps](https://hlt3.studio/services/cloud-devops.md): AWS infrastructure, CI/CD pipelines, serverless architecture, and infrastructure as code for scalable, reliable systems.
- [Health Tech Solutions](https://hlt3.studio/services/health-tech.md): Lab results parsing, health data visualization, and HIPAA/GDPR-compliant healthcare applications. Built by the team behind Health3.
- [Mobile App Development](https://hlt3.studio/services/mobile-apps.md): Expert Flutter development for iOS and Android. Build beautiful, high-performance cross-platform mobile apps with a single codebase.
- [SEO & Programmatic SEO](https://hlt3.studio/services/seo.md): Technical SEO audits, content strategy, and programmatic SEO to drive organic traffic at scale. Grow your visibility and reach.
- [Technical Consulting](https://hlt3.studio/services/consulting.md): Architecture reviews, code audits, and strategic guidance for your technology decisions. Expert advice when you need it.

## Case studies

How we built our products.

- [Health3: Personal Health Companion](https://hlt3.studio/case-studies/health3.md): How HLT3 Studio built Health3, a Flutter and AWS app that parses medical lab PDFs (Textract + Bedrock) into tracked biomarkers, serving 700+ users across 27 countries.
- [Reelry: AI Short-Video Generation](https://hlt3.studio/case-studies/reelry.md): How HLT3 Studio built Reelry, a web app that turns a topic into on-brand, ready-to-post short videos: Claude-written scripts, 30+ art styles, and 1080x1920 export for TikTok, Reels, and Shorts.
- [Unbuzz: Personal Caffeine Half-Life Modelling](https://hlt3.studio/case-studies/unbuzz.md): How HLT3 Studio built Unbuzz, a local-first iOS app that models each user's personal caffeine half-life from a short questionnaire and predicts a sleep-ready time.

## Pages

About the studio and how we work.

- [Built by Engineers, For Your Success](https://hlt3.studio/about.md): Zurich-based software development agency. Flutter mobile apps, Supabase backends, AWS cloud, and SEO. Built by the team behind Health3, Reelry, and Unbuzz.
- [Idea to working app in 21 to 30 days](https://hlt3.studio/mvp-sprint.md): Two productized engagements with fixed price, fixed scope, and a fixed end date. MVP Sprint at $4,900 / 3 weeks and HIPAA MVP Sprint at $9,900 / 4 weeks.