Added
New this week against a 3-week baseline.
Weekly changelog · iOS first
See what changed in your life.
Every finished week becomes a version. Open Sunday's report and see what moved, what held, and what deserves attention.
iOS 17+ · HealthKit optional · Free to start · No feed, no streaks
Real screens. Real weeks.
No mockups. These are actual renders from the app: home, the reveal moment, the report, the timeline, and insights. Drag or scroll sideways.
Five glyphs. Fixed meanings.
Increase is blue and decrease is amber because they are directions. Your chosen direction decides whether a trend reads as momentum or worth watching. Hover each card.
Removed
Gone for long enough to count.
Up
Cleared the noise floor. Streaks build.
Down
Same rule, opposite direction.
Changed
Bedtime and qualitative shifts.
On-device diffs. Private cloud backup.
Weekly diff calculations run 100% locally on your iPhone. Your cloud sync securely archives your history under your private anonymous account—with zero ad trackers, zero data selling, and zero profiling.
HealthKitManual check-insOn-device diffPrivate sync
On your iPhone
- Raw health samples stays local
- Diff calculations runs on device
- Offline history instant
- Personal reflections private
Private Cloud Sync
- Push token & tz Sunday nudge
- Encrypted history your account
- Ad trackers / profiling never
0 ads or trackers0 data selling
// PRICING · TRANSPARENT & HONEST
Invest in clarity. No hidden subscriptions.
Start free with zero friction. Upgrade to Pro whenever you want your whole history, comparison between any two versions, and the long-term patterns underneath them.
Starter
Everything you need to turn your finished week into an honest changelog.
$0
forever
Free forever · No credit card required
- ✓Unlimited weekly Sunday diff reports
- ✓Standard signals (HealthKit, Sleep, Workouts)
- ✓5 semantic diff glyphs (+, -, ↑, ↓, ~)
- ✓Your last four versions
- ✓100% private on-device processing
- ✓Check-ins, one goal and the basic share cards
MONTHLY
Pro Monthly
Flexible month-to-month access to your full life changelog and deep momentum signals.
$4.99
/ month
Billed monthly via App Store · Cancel anytime
- ✓Everything in Starter, plus:
- ✓Unlimited version history (v1.01 to latest)
- ✓Compare any two versions
- ✓Long-term patterns across your history
- ✓Month and year views
- ✓Every goal, and every share template
BEST VALUE · SAVE 50%
Pro Yearly
Continuous clarity all year round, at our best annual rate.
$29.99
/ year
Just $2.50 / month · Billed yearly via the App Store
- ✓Everything in Pro Monthly, plus:
- ✓Your whole history, however far back it goes
- ✓Save 50% compared to monthly plan
- ✓Compare any two versions, from any two weeks
- ✓Long-term patterns and quiet-week handling
- ✓Month and year views, and every share template
🔒 Apple App Store secure checkout
🔄 Refunds handled by Apple, under its own policy
🚫 Zero ads or telemetry monetization
// FAQ · UNDER THE HOOD
Frequently asked questions.
Clear answers about our diff algorithms, on-device privacy architecture, and how LifeDiff works with or without Apple Health.
How is LifeDiff different from Apple Health or habit trackers?
Most health apps act as high-frequency daily compliance engines—pestering you to close rings, log water, or maintain arbitrary streaks. LifeDiff treats your life like a software codebase. Once a week on Sunday, it compiles your finished days against your rolling baselines and generates a clean version release (like v1.24). You see high-signal net changes without daily notification noise.
How does LifeDiff handle on-device computation and cloud backup?
All metric analysis, baseline statistical calculations, and weekly changelog rendering execute strictly on your device's local CPU using local SQLite storage. For seamless backup across reinstalls, your weekly numbers, reflections, and check-ins are securely synced to your private Firebase account with anonymous authentication. Firebase also schedules your Sunday 8am notification. We never sell your data, never display ads, and our backend never reads your personal metrics to build advertising profiles.
What happens if nothing changed during my week?
LifeDiff celebrates quiet weeks! If your metrics remained within expected statistical baselines, your report cleanly notes ~ 0 changes detected and highlights your steady stability. We will never manufacture artificial drama, fake warnings, or clickbait insights to inflate engagement metrics.
Do I need an Apple Watch or Apple Health enabled?
Not at all. HealthKit integration is entirely optional. If you don't use Apple Health, LifeDiff effortlessly tracks manual Sunday check-ins, Screen Time, or custom daily ratings. A disconnected or denied data source contributes zero signal—never an artificial zero that corrupts your averages.
How do the git diff glyphs and directional rules work?
LifeDiff translates statistical deltas into five universal glyphs: + Added, - Removed, ↑ Increased, ↓ Decreased, and ~ Unchanged. Crucially, an increase is not assumed to be good. A rise in resting heart rate or screen time triggers an attention indicator, while a rise in sleep or outdoor walks is marked positive. You can customize directional preferences for any signal.
Can I share a weekly diff?
Yes. Every week can be shared as a card, and Pro opens the full set of share templates. File exports to Markdown, JSON or CSV are not in the app yet.
Start your baseline week.
Week one has nothing to compare yet, and LifeDiff will tell you so honestly. Then v1.02 arrives.
Free to start · iOS first · Android later