Heartbeat Detection False Triggers — A Complete Plan to Lower the False-Alarm Rate

'If I forget to check in for a week on a business trip, will it send out all my letters?' Everyone who learns about heartbeat detection asks this. The answer is no. The core design principle is 'prefer to miss a delivery over a false one.' Between check-in and delivery there are 4 layers of protection, and each one can halt the process.

Layer 1: The Grace Period

The check-in interval you set (say, 7 days) is not a hard deadline. After the interval passes, the system does nothing immediately. It gives you a grace period (also 7 days by default) during which you can check in and reset at any time. So even with a 7-day check-in interval, you effectively have 14 days of buffer. You can adjust the grace period in settings.

Layer 2: Personal Reminders

After the check-in interval passes, the system first emails you a reminder: 'You have not checked in for X days. Click here to check in.' Click the link and everything resets. If you do not see the email (traveling, hospitalized, changed inbox), the system follows up with an SMS reminder (if you have linked a phone number).

Only when personal reminders also go unanswered does the system move to the next stage. Most false triggers are caught here — most people check in after receiving a reminder.

Layer 3: Contact Confirmation

Once personal reminders remain unanswered, the system contacts your emergency contacts. The contact receives an email: 'Your contact has not checked in for over X days. Please confirm whether they are safe.' The contact has two options: Confirm Unreachable or False Alarm. For the detailed mechanism, see Heartbeat Detection & Timed Messages Guide.

Only after a contact selects 'Confirm Unreachable' does the system move to the delivery stage. If your contact knows you are fine (say, you are hospitalized but they know), clicking 'False Alarm' resets everything. This layer ensures that even if you personally cannot check in, a real person must confirm you are genuinely unreachable.

Layer 4: False-Alarm Reset

At any stage, simply logging in or clicking the check-in link immediately resets all status. Even if a contact has already 'confirmed you unreachable,' as long as you are alive and log in, the system stops the delivery. This guarantees: as long as the person is still here, nothing gets sent by mistake.

A contact can also click the 'False Alarm' link to reset at any time. So in theory, even if you have not checked in for 3 months and a contact has confirmed you unreachable, logging in the next day cancels everything.

Best Practices for Reducing False Alarms

• Set a longer check-in interval — 7–14 days works well. Too short (1–3 days) is easy to forget; too long (90 days) means slow response.
• Do not set the grace period too short — We recommend it be at least as long as the check-in interval. You may go long stretches without checking in while traveling.
• Pick informed contacts — Choose people who know you use TimeWill, so they will not panic when they get a reminder.
• Add more than one contact — Premium supports up to 10. If one misses the email, another might catch it.
• Link a phone number — On top of email reminders, SMS reminders are harder to miss.

For specific advice on check-in intervals, see Recommended Heartbeat Detection Intervals. For guidance on choosing emergency contacts, see How to Choose Emergency Contacts.

What to Do if a False Alarm Already Fired

If you receive a false-alarm reminder email, the simplest move is to click the check-in link in it. That immediately resets all status. If you can no longer access your inbox (say, it was compromised), contact your emergency contacts and have them click the 'False Alarm' link. If a contact has already confirmed you unreachable but you are alive, just log in to TimeWill to cancel.

Worst case: a contact confirms you unreachable, the system enters the delivery stage, and you suddenly reappear. At that point, log in right away and the system halts any letters that are still pending. Letters already delivered cannot be recalled (the emails have gone out), but your heartbeat status resets and no further letters are sent.