What is SnoopTheDay?

SnoopTheDay calculates the exact number of days each of your contacts has lived — and discovers every imaginable kind of "day-versary". Birthdays only come once a year. With SnoopTheDay, you'll find plenty more reasons to celebrate.

The app works entirely on your device. No account required, no data leaves your phone.

✓ Free ✓ No account needed ✓ Your data stays on your phone

How it works

1

Keep birthdays in your contacts. The more contacts with birthdays, the more SnoopTheDay can find.

2

SnoopTheDay does the math. It scans every contact and combination of favourites for upcoming special days.

3

Get notified & celebrate. Never miss a day-versary again — with calendar entries or push notifications.

Core Features

Upcoming day-versarys

Upcoming Day-versarys at a Glance

See all upcoming milestones across your contacts in a single, clear list. Filter by time range, specific date, or focus on individual people — so you always know what's coming up next.

Rich pattern detection

A World of Patterns

SnoopTheDay detects a wide range of special number patterns in a person's day count, including:

  • Round Milestones (e.g. 10,000 days)
  • Repeating Digits (e.g. 11,111 days)
  • Sequences (e.g. 12,345 days)
  • Palindromes (e.g. 11,211 days)
  • Mathematical & Physical Constants (π, φ, e, √2 and more)
  • …and many more
Combined milestones

Combined Milestones

Mark contacts as Favourites and SnoopTheDay will also look for day-versarys in the combined total of their days lived. Celebrate shared milestones with the people who matter most.

Smart ratings

Smart Rating System

Not all milestones are equal. Each day-versary is rated across three dimensions:

  • Beauty — how visually appealing the number pattern is
  • Rareness — how infrequently this pattern occurs mathematically
  • Vitality — statistical likelihood of being alive at that day count

A combined star rating helps you instantly spot the truly special ones.

Filters and themes

Flexible Filters & Themes

Filter events by upcoming date, a specific day, or a custom date range — so you always see exactly what matters to you.

Color schemes

Light & Dark, Your Way

SnoopTheDay comes with a carefully crafted color palette for both light and dark mode — switching seamlessly to match your system preference or personal taste.

Get SnoopTheDay for Android

Ready to discover your next reason to celebrate?

▶  Download on Google Play

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