/en/projects/dont-die-todayComing soon
Don't Die Today app icon

Don't Die Today.

Longevity, one day at a time.

iOS longevity app that uses Apple Health to automatically compute your daily Longevity Score. Habits, check-ins and metrics focused on living better — not just longer.

  • SwiftUI
  • HealthKit
  • SwiftData
  • Sign in with Apple
  • StoreKit 2
  • PostHog
  • Claude Code
  • Codex
  • Blitz
Coming soon · Apple App Store

Don't Die Today arriving.

Category
Health & Fitness
Platform
iOS
Release
2026
Developer
Gabriel Vaz
— Screens

Inside the app

04 / iPhone

  • Don't Die Today — Splash · brand
    01Splash · brand
  • Don't Die Today — Today's Longevity Score
    02Today's Longevity Score
  • Don't Die Today — Daily plan
    03Daily plan
  • Don't Die Today — Today · check-ins and habits
    04Today · check-ins and habits
— Features

Everything that matters. Nothing that doesn't.

Case study · from problem to launch

Your Apple Watch knows everything about your body. And yet, you don't know how you're doing.

  1. — 01 / The spark

    Bryan Johnson charges $1,500 a month.

    I've worn an Apple Watch for almost a decade. At some point I realized: I have data on sleep, workouts, HRV, VO2 max, steps — the full infrastructure to understand my longevity trajectory.

    And still I look at isolated metrics, with no narrative. Bryan Johnson charges over a thousand dollars a month for something my iPhone already measures silently. Why is that signal locked inside separate charts?

  2. — 02 / The user problem

    More data isn't more clarity.

    The user doesn't want another dashboard. They want a simple answer to `how am I doing, overall?`.

    Longevity apps are either too scientific — demanding obsessive discipline, spreadsheets and supplements — or shallow gamification. The middle is missing: a daily, clear, non-judgmental signal built on data that already exists.

  3. — 03 / The concept

    One number. Every day.

    Longevity Score auto-computed from Apple Health. Sleep, activity, recovery and stress combined into a single number — not to rank, but to make the trend visible.

    Optional daily check-ins for the habits sensors can't see: hydration, strength, sunlight, reading. The app is the mirror — not the judge.

  4. — 04 / Validation

    Ninety days. Five stubborn testers.

    I tested with myself for 90 days and with 5 friends obsessed with longevity. Confirmed: the daily number drives more reflection than any chart.

    When the score drops, the user knows why — because the app ties the number back to the week's behaviors. When it rises, they know what to repeat.

  5. — 05 / Built with AI

    HealthKit is hostile. AI tamed it.

    Native iOS in SwiftUI + HealthKit + SwiftData, in daily sessions with Claude Code and Codex inside Blitz. AI generated HealthKit adapters, every score calculation with its tests, the check-in flows and the trend UI.

    I kept control of what actually matters: the score formula, the copy, and the motivation curve. That's where human expertise lives — the rest is boilerplate AI writes in minutes.

    • SwiftUI
    • HealthKit
    • SwiftData
    • Sign in with Apple
    • StoreKit 2
    • PostHog
    • Claude Code
    • Codex
  6. — 06 / Launch

    A mirror, not a diagnosis.

    Coming soon to the App Store, categorized in Health & Fitness. Full HealthKit declarations in PrivacyInfo.xcprivacy. Optional Sign in with Apple for sync; account deletion is reachable inside the app, as required by Apple guideline 5.1.1(v).

    Anonymized PostHog to understand screen drop-off — opt-out available in Settings. The Longevity Score doesn't replace medical advice.

— Privacy first

Built with respect for you.

  • 01Apple Health: local reads, optional writes
  • 02No selling, renting or sharing of data
  • 03Optional Sign in with Apple for sync
  • 04Anonymous usage analytics (PostHog), opt-out available
— Documents
Privacy PolicyEnglishTerms of UseEnglish