How to choose a check in interval you will actually keep

Every interval is a trade between two failures. Too long, and there is a gap between something happening to you and anyone finding out. Too short, and the vault fires while you are perfectly well, sitting in a hotel with no signal, and a letter you meant for one day arrives on an ordinary Tuesday.

The second failure is far more common, and unlike the first, it cannot be undone.

What is available

Presets are 1 hour, 6 hours, 12 hours, 1 day, 2 days, 3 days, 1 week, 2 weeks and 30 days. Pro and Lifetime accounts can set any value between one hour and thirty days, so a 10 day or 21 day timer is available if that fits your life better than the presets.

A rule that works

Take the longest realistic stretch you might go without reliable internet: a flight, a hospital stay, a camping trip, a bad week. Double it. That is your minimum safe interval for a vault you never want to fire by accident.

Sensible starting points

• 30 days. The right answer for the classic case: passwords, documents and instructions for your family. Nothing about that message becomes useless because it arrives a few weeks late, and a monthly check in is easy to keep for years.
• 1 or 2 weeks. Good for anything tied to a business or a responsibility other people depend on, where a month of silence would already be a problem.
• 2 or 3 days. For a specific risky period rather than permanent use. Arm it before the trip, pause it when you are home.
• 1 to 12 hours. Only for a single known window: a meeting, a dive, a journey. Treat these as temporary and pause them the moment the window closes.

You can change it whenever you like

Editing the interval on an armed vault moves the deadline with it, measured from your last check in. Lengthening buys you time immediately. Shortening can bring the deadline closer, so check the new deadline shown on the vault before you walk away from the screen.

Use more than one vault

There is no rule that everything lives on one timer. A common and sensible arrangement is a 3 day vault holding "something is wrong, please look into it" to a friend, and a 30 day vault holding the real contents to your family. The short one raises the alarm; the long one only fires when the situation is genuinely permanent.