Long-form, opinionated pieces on the tools, products and process behind the studio. Twenty articles on the stack, AI agents, voice, real-time sync, compliance posture, and what we deliberately cut to ship in six weeks.
The stackAptixLabs · 2026-05A deliberately small modern stack — React, React Native, Firebase, ElevenLabs, Vertex AI — that lets a three-person team operate a real-time product without an infra engineer on payroll.
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ProductsAptixLabs · 2026-05A single React Native codebase, Firestore as the live database, ElevenLabs voices on demand — and the engineering trade-offs that took it from prototype to 5,000+ Android installs and a 4.8★ App Store rating.
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ProductsAptixLabs · 2026-05A React web app that shares its database with the mobile app, scoped per coach by security rules, with programme transactions and role-based access enforced server-side.
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AI & agentsAptixLabs · 2026-05A Cloud Run worker turns a one-line brief into a finished Reel, carousel and caption — LLM script, ElevenLabs voice, headless-browser slides, Instagram Graph API. End-to-end: roughly four minutes per asset.
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AI & agentsAptixLabs · 2026-05A single cloned brand voice that powers real-time workout coaching in UltraFit360 and every reel the studio ships. The ElevenLabs partnership made it economical.
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AI & agentsAptixLabs · 2026-05Job-specific agents grounded in the client's own Firestore data, with multi-model routing, persistent state, and a guardrails layer that decides what the agent can and cannot touch.
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ProductsAptixLabs · 2026-05Apple HealthKit, Google Health Connect, Apple Watch, Garmin, WHOOP — the integrations that decide whether a fitness app gets used or deleted in the first week.
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Trust & complianceAptixLabs · 2026-05Compliance-first architecture from day one — encryption, BAAs, quarterly access reviews, customer-owned GCP project for partners who need it. No badges, just controls that actually run.
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InfrastructureAptixLabs · 2026-05A document store with real-time listeners and fine-grained security rules removes most of the operational work that comes with running a relational cluster. Postgres is the fallback, not the default.
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InfrastructureAptixLabs · 2026-05Firestore onSnapshot is the message bus — no WebSocket server, no Redis, no Pusher. Three-person team operates a real-time product because the infra refuses to require an infra engineer.
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AI & agentsAptixLabs · 2026-05The studio's own X, Instagram and LinkedIn presence runs on the same pipeline we pitch to partners. Daily Cloud Scheduler, weekly human review.
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How we workAptixLabs · 2026-05GitHub Actions runs every check, Fastlane + EAS pushes mobile builds, Firebase Hosting promotes web on green. Secrets stay in Google Secret Manager. The studio prefers small, frequent deploys.
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AI & agentsAptixLabs · 2026-04Three cost-cutting habits: cache deterministic outputs forever, route to the cheapest model that meets the quality bar, and use prompt caching for stable system prompts.
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How we workAptixLabs · 2026-04Vitest for logic, Firebase emulator for rules, Detox for mobile flows, Playwright for web smoke + visual regression. We don't chase coverage — we cover the paths that lose user trust.
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The stackAptixLabs · 2026-04On-device CV for rep counting, Rive over Lottie for in-app animation, View Transitions API for native-app-like route changes. Plus the AV1 codec, scroll-driven CSS, and llms.txt for AI crawlers.
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How we workAptixLabs · 2026-04Design tokens flow from Figma Variables to CSS custom properties via the official MCP. Components map 1:1 between design and code so there's a single source of truth for each.
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ProductsAptixLabs · 2026-04Firebase Cloud Messaging unifies APNs and FCM under one API. The harder problem isn't delivery — it's knowing when not to send.
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ProductsAptixLabs · 2026-04RevenueCat for subscriptions, Stripe for web checkout, careful boundary-crossing between the two. The 30% Apple tax is a fact — the studio designs around it, not against it.
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How we workAptixLabs · 2026-04Submissions are a process, not a button. The studio runs a pre-submission checklist that has gotten UltraFit360 through six App Store reviews on first try.
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How we workAptixLabs · 2026-04Two-week design sprint, four-week build sprint, hard scope freeze on week three. The studio promises six weeks because every cut is decided before we start, not during.
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ProductsAptixLabs · 2026-05Basements, steel racks and dead zones — gyms are where mobile signal goes to die. UltraFit360 is built offline-first so a workout never stalls waiting on the network.
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The stackAptixLabs · 2026-05React Native gets a bad reputation for jank. Most of it is avoidable. Here are the specific habits that keep UltraFit360 scrolling at 60fps on mid-range Android phones.
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AI & agentsAptixLabs · 2026-05A clever prompt that works in a playground and a prompt that survives ten thousand real users are different things. Here is how the studio writes the second kind.
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InfrastructureAptixLabs · 2026-05You don't need a five-person platform team to know when production breaks. Here is the lightweight observability stack a three-person studio runs.
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How we workAptixLabs · 2026-05Most fitness apps lose half their users before the first workout. The fix is rarely more features — it's removing everything between download and the first win.
Read articleThe studio is taking on a small slate of partners as we expand into web, mobile and AI agents.
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