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Silent SOS. Safety at your fingertips.

Discreetly alert trusted contacts with your live location in seconds—then undo within 5.

Privacy-first
Notify discreetly
5-second undo
9:41
!

How it works

The exact high-level SOS sequence implemented in the app.

Discreet trigger

Start from an iPhone widget, Siri Shortcut, or inside the app—built on App Intents.

Location snap

Whisppr grabs a quick single location fix (or safely falls back to last known if it can't get a precise one fast).

5-second grace

An undo window gives you five seconds to cancel accidental taps before anything is sent.

Instant alerts

If not canceled, your verified contacts get a text with your name, time, and a maps link to your location.

trigger→enqueue ≤1s
SMS ≤8s p95
≥99.9% delivery

Built for real emergencies

What the system optimizes for when every second counts

Low latency path

trigger→enqueue ≤1s; enqueue→SMS ≤3s p50 / ≤8s p95 in healthy networks.

High reliability

Alert delivery targets ≥99.9% monthly success with delivery receipts.

Battery-aware

Minimal background work; quick precise fix when possible.

Acceptance goals include 99.5% undo reliability and p95 SMS in ≤8s.

Features

MVP

Discreet triggers

Widgets, Shortcuts, App Intents; Back Tap docs for Shortcut.

MVP

5-second Undo

Cancel from a local notification action before anything leaves your phone.

MVP

Trusted contacts

Add & verify 2–3 contacts so they're ready when you need them.

MVP

Location in the alert

Name, timestamp, and a live/location link in the SMS.

MVP

Disguise mode

Alternate icon and a simple landing shell (Calculator/Notes-style).

Soon

Premium features

Fake Call, Live tracking, Vibe checks, Profiles, Apple Watch.

Sample SMS Format

What your contacts actually receive

From: Whisppr
Now

ALERT: Alex needs help

Time: 8:42 PM

https://maps.apple.com/...

Reply STOP to unsubscribe

Premium (coming soon)

Advanced features for enhanced safety and peace of mind

Premium

Fake Call

Server-placed PSTN call to your phone (compliant; no spoofing).

Premium

Live tracking window

Share periodic pings for N minutes.

Premium

Vibe checks

Gentle pings with auto-escalation if you don't respond.

Premium

Profiles

Pick who gets alerted (e.g., "Roommate only", "All contacts").

Premium

Apple Watch

SOS via complication/App Intent.

About Whisppr

Who uses Whisppr (personas → one-line proof)

  • Student

    Fast one-tap SOS + fake call for an exit.

  • Night-shift / rideshare

    Silent trigger; share location with multiple contacts.

  • Survivor

    Disguise mode + 5-second undo to avoid accidental sends.

  • Parent/guardian (consented)

    Defined windows and boundaries for tracking/check-ins.

Built for specific safety scenarios with proven use cases.

Privacy & Security (what we actually do)

  • Data minimization & encryption

    Device Keychain + encrypted storage; TLS 1.3 in transport.

  • Verified contacts

    No alerts to unverified numbers; rate limits prevent abuse.

  • Clear consent for guardian/premium features

    Explicit opt-in only.

  • Auto-purge

    Location pings have TTL; you can delete all data.

  • 911 policy

    Whisppr does not route to emergency services; we provide native iOS SOS tips.

iOS realities

Why Whisppr works the way it does

Fast entry points

Widgets & Shortcuts are the fastest safe entry points; some tasks still need a quick app foreground.

SMS routing

iOS won't allow silent device-sent SMS; we dispatch via backend/Twilio.

Disguise mode

Alternate icons are fully supported for disguise.

FAQs

Technical answers grounded in how Whisppr actually works.

Have more questions?

Make safety simpler.

Join the waitlist to help us validate low-latency alerts, reliable undo, and disguise flows before 1.0.

No spam, ever. We'll only email you with important updates about Whisppr's development and launch.