Free: Pip courier with three sends per week. Pro: $1.99 monthly, $14.99 yearly, or $19.99 lifetime. Adds three additional couriers, unlimited sends, snooze, repeating reminders, and full archive. App Store prices vary by country.
Not given
Key features
Delivers reminders to Dynamic Island at scheduled time
Send sealed notes via messaging app links
Recipients cannot peek at messages until arrival time
Snooze and repeating reminders (Pro)
Full archive of reminders (Pro)
Works on iPhone Lock Screen without Dynamic Island
No account required
Real-time ray tracing through curved spacetime
Augmented reality view of black hole
37 color palettes and custom colors
Customizable accretion disc textures
Emoji swarm replacement for accretion disc
Upload custom photos to accretion disc
Interactive orbit and zoom controls
Save custom presets
What makes it different
Sealed delivery: recipients know when but not what until the moment arrives
Four distinct animal couriers with different personalities
Delivers directly to Dynamic Island for native iPhone integration
No accounts or cookies required
Scientifically accurate simulation using general relativity equations
Real-time physics applied to personal photos and emojis
Pipnote
Black Hole Sandbox