Privacy

Last updated September 9, 2026

Muster is published by Driven Leaf, LLC (“we”). The app collects no data about you. That is not a promise about how carefully your information is handled—it is a statement that we never receive it in the first place.

The app

Muster has no accounts and no sign-in. We operate no server that the app talks to, so there is nothing of yours for us to store, analyze, sell, or be compelled to hand over. Specifically, the app has:

• No analytics or usage tracking.
• No advertising, ad networks, or ad identifiers.
• No third-party SDKs that collect data on our behalf.
• No location data.
• No contacts, photos, or health data.
• No account creation. There is nothing to sign up for.

Your calendar

Muster reads the events on your device’s calendars so it can show you today’s list and let you choose which ones get an alarm. That reading happens entirely on your device. Your events are never uploaded, never sent to us, and never shared with anyone else.

Muster only reads. It never adds, edits, or deletes an event. iOS will still ask you to grant “full access” to your calendar, which sounds broader than it is: full access is the only permission level Apple offers that permits reading events at all, and there is no read-only option to request instead. You can review or revoke it at any time in Settings › Privacy & Security › Calendars.

Alarms and notifications

The alarms you arm are scheduled on your device through Apple’s AlarmKit, which is what lets them ring even when the device is silenced. The morning reminder that prompts you to look at the day is a local notification, scheduled by the app on the device. Neither one involves a server of ours, and nothing about which events you chose leaves your devices.

Where your choices live

What you set up in Muster—which events you armed, and the settings you chose—is stored by the app on your devices, not by us. There is nothing to sign in to, and no copy of it on any server we run.

Purchases

Muster is a one-time purchase, handled entirely by Apple’s App Store. We never see your payment details. The app asks the App Store whether this purchase has been made and gets back an answer about this device; that exchange is between your device and Apple, and is covered by Apple’s Privacy Policy (opens in a new tab).

This website

musteralarms.com collects nothing. It is a set of static HTML, CSS, and image files served from a server we run. Specifically, this site has:

• No analytics (no Google Analytics, Plausible, Fathom, or anything similar).
• No cookies.
• No advertising or ad networks.
• No tracking pixels or fingerprinting.
• No third-party scripts, fonts, or embeds. Every file the site loads comes from musteralarms.com.

As with any web server, requests appear in server logs, which include an IP address and are used only to keep the site running and secure. They are not analyzed to build a picture of visitors, and they are not shared.

Support email

If you email support@drivenleaf.com, we will have whatever you choose to put in that message, and we will use it only to reply to you. We do not share it with third parties.

Children

Muster knowingly collects no personal information from anyone, including children. Because it collects nothing at all, it is designed to minimize privacy risk for users of every age.

Changes

If this policy changes, the updated date at the top of this page changes with it.

Contact

Questions about privacy are welcome at support@drivenleaf.com.