Text Messages

Let Them Know · Last updated November 9, 2026

Let Them Know does not currently send text messages. Alerts reach only contacts who have the free Let Them Know app and accepted an invitation. This page describes how text messages work if they are offered; users will be told in the app before any are sent.

Let Them Know is an iPhone app made by Teal River Technologies, LLC. When someone using Let Them Know sends an alert, and the one or two people they chose as emergency contacts get a text message with their name, a short message and a map link to their location. This page explains who gets these texts, how they agree to them, and how to stop them.

Who gets texts

Only the emergency contacts a Let Them Know user personally chooses: up to two people, usually family members or close friends. Let Them Know never sends marketing or promotional texts, and never texts anyone the user didn't add themselves.

How contacts agree

  1. A Let Them Know user asks someone they know to be their emergency contact. Before the app lets them add anyone, it shows this script to read to that person (Ask Them First), and the user must tap They Said Yes to continue:
    "Can I add you as my emergency contact in Let Them Know? If I send an alert, you'll get a text with my name, a short message and my location. You'll also get one text now saying I added you. At most 20 alerts a month; message and data rates may apply. Reply STOP anytime to opt out, or HELP for help. Is that OK?"
    The person is added only if they say yes.
  2. When adding that person's number in the app, the user confirms: "By adding someone, you confirm they've agreed to get emergency texts from you. They'll get a text letting them know, and can reply STOP to opt out."
  3. The contact immediately gets a one-time text telling them who added them, what they'll receive, and how to stop it (see below).

Contacts can also install the free Let Them Know app and accept an invitation. Alerts then reach them as app notifications, and a text is sent only if a notification isn't received.

The messages

When you're added (once):

Let Them Know: Sarah added you as an emergency contact and may text you their location in an emergency. Reply STOP to opt out, HELP for help.

An alert:

Let Them Know alert from Sarah: I need help
maps.google.com/?q=40.71278,-74.00597

Texts are sent only when the Let Them Know user sends an alert, at most 20 alerts a month. Message and data rates may apply.

Stopping texts and getting help

Got a Let Them Know text you weren't expecting? Someone may have entered your number by mistake. Reply STOP and you will get nothing more from Let Them Know. Let Them Know users must ask each contact before adding them and are responsible for entering the right number (see the Terms).

Reply STOP to any Let Them Know text and you will get no more texts from Let Them Know. Reply START to receive them again. Reply HELP for help, or email admin@tealrivertechnologies.com.

Privacy

Phone numbers are used only to deliver these alerts. They are never sold, and are not shared with third parties or affiliates for marketing or promotional purposes. See the Privacy Policy.