HealthTrajectory
AI-assisted health tracking
Brings bloodwork, health history, lifestyle and diet into one place, then turns the trend into plain-language education.
iOSAndroidWeb
Products
Everything we’ve built.
A directory of every Espyeon application. Each one has its own overview, its own privacy policy and its own terms — written for that product specifically, not inherited from a generic template.
Engineering scope
What goes into one of our applications.
The same disciplines apply to every product in this directory, and the same commitments are enforceable against us through each product’s own published policies.
Native mobile applications
Applications built for iOS and Android that feel like they belong on the platform, because they use the platform.
- Swift and SwiftUI on Apple platforms; Kotlin and Jetpack Compose on Android
- Designed against Apple's Human Interface Guidelines and Google's Material design system
- Full support for dynamic type, dark mode, VoiceOver and TalkBack
- Offline-first data layers so the app keeps working without a connection
Backend and infrastructure
The unglamorous half that decides whether an app survives its first thousand users.
- Typed APIs, managed Postgres, and background job pipelines
- Authentication, authorization and audit trails designed in from the start
- Automated backups with restores that are actually tested
- Observability — structured logs, tracing and alerting on the paths that matter
Privacy engineering
Data you never collect is data that can never leak, never gets subpoenaed, and never has to be disclosed on a nutrition label.
- Data minimisation reviewed before a feature is written, not after
- On-device processing wherever the feature allows it
- Honest App Store privacy labels and Play Data safety declarations
- Deletion paths that actually delete, end to end
Release and lifecycle
Shipping is a process, not an event. We treat store review as part of engineering, not an afterthought.
- App Store and Play Console submission, review responses and phased rollouts
- Crash triage and regression tracking across OS versions
- Store listing, screenshots and metadata prepared to each store's spec
- Ongoing maintenance as platform APIs and policies change