Relationship intelligence, quietly

Never miss a moment
that matters.

Siren remembers the birthdays, anniversaries, and milestones in your life — and helps you show up thoughtfully every time.

Start for freeSee how it works
No credit card to startSetup in under 2 minutesPrivate by design
app.siren.co

UPCOMING

Moments

M

Mia's birthday

Jun 18 · 6 days

Suggest
P

Parents' anniversary

Jun 22 · 10 days

Plan
A

Arun's work anniversary

Jul 1 · 19 days

Act
🔒Your moments are private. Always.

Features

A thoughtful assistant for the people you care about.

Notice

Dates that matter, never forgotten.

Add the people in your life once. Siren tracks every birthday, anniversary, and milestone — so nothing slips through the cracks.

Suggest

Thoughtful ideas, right when you need them.

Days before each moment arrives, Siren surfaces gift ideas, messages, and actions tailored to the person and the occasion.

Act

One tap to show up well.

Approve a suggestion, send a message, or mark the day — everything you need in a single, low-friction flow.

How it works

Three steps to showing up well.

01

Add your people and dates.

Import from your contacts or enter names manually. Add the dates that matter — birthday, anniversary, hire date, anything.

02

Siren plans ahead, quietly.

Weeks before each date, Siren lines up suggestions: a message to write, a gift to send, a reservation to book.

03

You act, they feel remembered.

Review your plan, tap to act, and move on. You showed up thoughtfully. That's what people remember.

Why Siren

Reminders don't make moments. Thoughtfulness does.

Calendar apps remind you on the day. Siren plans with you weeks ahead — so you have time to find the right gift, write the right message, or make the right reservation. The difference between "Oh, it's today" and "I've been looking forward to this."

ProactivePlans ahead of the moment, not during it.
ContextualSuggestions fit the person and the occasion.
PrivateYour relationship data stays yours.

"I've never been good at remembering. Now I'm the person who shows up exactly right — every time."

S

Sarah K.

Early access user

Pricing

Simple, honest pricing.

Free

$0forever

For getting started. No credit card needed.

Up to 10 tracked dates
Basic reminders by email
Manual notes per person
Start free
Most popular

Plus

$5per month

For people who want to show up well, every time.

Unlimited tracked dates
AI gift and message suggestions
Multi-step advance reminders
Relationship history timeline
Priority email support
Start free trial

Start remembering the moments that matter.

Free to start. No credit card. Setup in under two minutes.

Get started for free