Last updated: 24 August 2026

Alarm Lock is built around a pretty simple privacy idea: your alarm doesn’t need to know who you are.

Most of what Alarm Lock does happens directly on your iPhone. You don’t need an account to use the app, and we don’t want to collect information just because we can.

This page explains what happens to your information when you use the Alarm Lock app or sign up for the beta at alarmlock.derkeusman.com.

The short version

In the Alarm Lock app:

  • your NFC tag information stays on your device;
  • your alarms and app settings stay on your device;
  • NFC matching happens on your device;
  • there is no Alarm Lock account;
  • we don’t use your alarm data for advertising;
  • the core app does not need analytics, cloud processing or external AI.

On the Alarm Lock website:

If you sign up for beta testing, we collect the information you choose to give us so we can contact you about the beta.

Email addresses and beta sign-up details are stored in Brevo, which is used to manage the beta mailing list and send email.

That’s basically it.

Information stored by the app

Alarm Lock needs to remember some information in order to work.

Depending on the features you use, this can include things such as:

  • your registered NFC tag fingerprints;
  • names you give to NFC tags;
  • your alarm times and schedules;
  • which NFC tag is assigned to an alarm;
  • your selected alarm sound;
  • app settings and preferences;
  • information needed to keep track of whether an alarm is currently active.

This information is stored locally on your iPhone.

An NFC fingerprint is the identifier Alarm Lock uses to recognise a tag you previously registered. Alarm Lock doesn’t need to know what the tag represents outside the app, and it doesn’t write personal information to the NFC tag.

Scanning and comparing NFC tags is performed on your device.

Morning progress and other future features

Alarm Lock may include features such as morning streaks, achievements, successful-dismissal history, emergency-dismissal counts or other morning statistics.

Where these features are stored only on your device, that information remains local as well.

If a future version of Alarm Lock introduces optional cloud sync, accounts, remote analytics or another feature that sends this information away from your device, this privacy policy will be updated before that feature is introduced.

What the app doesn’t collect

The current Alarm Lock app does not require us to collect:

  • your name;
  • your email address;
  • your contacts;
  • your photos;
  • your precise location;
  • the content of your NFC tags;
  • advertising identifiers;
  • your alarm history on our servers;
  • information for behavioural advertising.

Alarm Lock does not sell your personal data.

We also don’t use data from the app to track you across apps or websites owned by other companies.

Apple and your iPhone

Alarm Lock uses Apple technologies such as AlarmKit and Core NFC to provide alarms and NFC scanning.

Your iPhone and Apple may process information as part of providing operating-system features. That processing is controlled by Apple and is subject to Apple’s own privacy practices.

Alarm Lock only requests access that is needed for the feature you are trying to use.

Beta sign-up on the website

The website is separate from the app.

If you join the Alarm Lock beta list, we currently ask for:

  • your email address;
  • your first name, if you choose to provide it;
  • your answer to a question about what makes mornings difficult;
  • your agreement to be contacted about Alarm Lock beta testing.

We use this information to:

  • organise beta testing;
  • invite people to test Alarm Lock;
  • communicate important information about the beta;
  • understand what kinds of morning problems potential testers want Alarm Lock to help with;
  • ask for relevant feedback about the app.

Signing up is optional.

We won’t add you to an unrelated mailing list or sell your details to advertisers.

How your email address is stored

Email addresses and other beta sign-up details are stored in Brevo, the service Alarm Lock uses to manage its beta mailing list and send email.

Brevo processes this information on behalf of Alarm Lock as a service provider. This means your email address and related sign-up information are stored there so we can manage the beta list and send you the messages you signed up to receive.

We do not sell your email address or use it for third-party advertising.

You can ask to have your information removed from the beta list at any time. Where an unsubscribe option is included in an email, you can also use that to stop future beta emails.

Brevo has its own privacy and security practices for the infrastructure it provides.

Why we’re allowed to use this information

For beta communication, we rely primarily on your consent: you choose whether to sign up and whether you want us to contact you.

You can withdraw that consent whenever you want.

We may also process limited technical information where reasonably necessary to operate and secure the website, for example to prevent abuse or diagnose technical problems.

Website technical information

Like most websites, the systems used to deliver the Alarm Lock website may temporarily process technical information such as:

  • your IP address;
  • browser and device information;
  • the date and time of a request;
  • pages or resources requested;
  • information needed for security and error logging.

This information is used to deliver the website, maintain its security and diagnose technical problems. It is not intended to build an advertising profile about you.

Cookies and tracking

Alarm Lock does not need advertising or cross-site tracking cookies.

The website may use strictly necessary technical storage where it is required for the website or beta form to function.

If we later introduce non-essential analytics, marketing cookies or similar tracking technology, this section — and where necessary the site’s consent controls — will be updated before that data is collected.

Who gets your information?

We don’t sell your information.

Beta registration information may be processed by service providers that are necessary to operate Alarm Lock’s website and beta programme.

In particular, Brevo is used to store and manage the beta mailing list and to send beta-related email. Brevo processes this information on behalf of Alarm Lock.

Other technical providers, such as the website hosting provider, may also process limited information where necessary to deliver or secure the website.

Information stored locally inside the Alarm Lock app — such as NFC tag fingerprints, alarm settings and local progress data — is not routinely sent to Brevo or other website service providers.

We may also disclose information if we are legally required to do so.

How long do we keep beta information?

We keep beta sign-up information only for as long as it is reasonably useful for running the Alarm Lock beta programme and communicating with people who asked to participate.

If you ask us to remove your information or withdraw your consent, we will remove your details from our active Brevo mailing list unless there is a legal reason that requires us to keep a limited record.

We will also periodically remove information that is no longer needed.

Information stored locally by the Alarm Lock app remains on your device until it is removed through the app, the app’s data is deleted, or the app is uninstalled, depending on the type of information.

Deleting your information

For information stored only inside the Alarm Lock app, you remain in control of the device on which that information is stored.

Depending on the feature, you can remove information inside Alarm Lock or by deleting the app and its local data.

For information you submitted through the beta website, you can contact us and ask us to:

  • tell you what personal information we have about you;
  • correct it;
  • delete it;
  • stop using it;
  • provide a copy where applicable;
  • withdraw your consent.

Contact: alarmlock@derkeusman.com

We may need enough information to identify the beta registration you are asking about, such as the email address you used to sign up.

Your privacy rights

If you are in the European Economic Area, including the Netherlands, the GDPR gives you rights regarding your personal data.

Depending on the situation, these can include the right to:

  • access your information;
  • correct inaccurate information;
  • request deletion;
  • restrict certain processing;
  • object to certain processing;
  • receive certain information in a portable format;
  • withdraw consent.

Withdrawing consent does not make earlier processing that was carried out while you had given consent unlawful.

If you believe your personal information hasn’t been handled properly, you also have the right to make a complaint to your local data protection authority.

In the Netherlands, this is the Autoriteit Persoonsgegevens.

You are always welcome to contact us first so we can try to resolve the issue.

Children

Alarm Lock is not designed to collect personal information from children.

If this changes, or if Alarm Lock is specifically made available to children in a way that requires additional privacy protections, this policy will be updated accordingly.

Security

We try to collect as little information as possible in the first place.

Information submitted through the website is protected using reasonable technical and organisational measures appropriate to the type of information involved.

No website or storage system can be guaranteed to be completely secure, so we can’t promise absolute security.

Keeping the majority of Alarm Lock’s functional data directly on your iPhone reduces the amount of personal information we need to hold on external systems.

If Alarm Lock changes

Alarm Lock is still being developed, so features will change.

If we introduce something that materially changes how personal information is collected or used — such as accounts, cloud sync, analytics, crash reporting that sends identifiable data, or online morning statistics — we’ll update this privacy policy and any required App Store privacy information.

The date at the top of this page will show when the policy was last updated.

Who is responsible for Alarm Lock?

Alarm Lock is an independent app developed in the Netherlands.

Developer / data controller: derk eusman
Contact: alarmlock@derkeusman.com
Website: alarmlock.derkeusman.com

Questions about privacy are welcome. Privacy policies shouldn’t require a law degree to understand.