Privacy

LY4A DX Reminder has no accounts. The Android, Windows and macOS apps have no server of their own and keep everything on your device; the iPhone app uses this site to watch the clusters for you, because iPhone does not let an app do that itself. This page says exactly what the apps and this site do with data.

What the app keeps

The callsigns you are watching, the bands and modes chosen for them, your settings and the spots already seen. All of it stays on the device itself, in the app’s own storage. Nothing is sent anywhere, and there is nothing to sign up for.

What the app sends

To learn whether a callsign is on the air, the app asks the same public DX cluster services a person would open in a browser: DXScape, DXSummit, DXHeat, PSK Reporter and Reverse Beacon. Each request carries the callsign being looked for. Those services see the request and the internet address it came from, and handle it under their own rules. Nothing else leaves the device: the apps contain no analytics, no crash reporting and no advertising.

The iPhone app

iPhone does not let an app keep watching in the background, so for iPhone the watching is done by this site. The app sends ly4a.com an anonymous device identifier issued at first launch, the notification token Apple assigns to the phone, the language, the callsigns you watch with their bands and modes, and your alarm settings. That is everything, and none of it identifies you: there is no e-mail, no name and no account. The site checks the clusters every minute for those callsigns and, on a match, sends the alarm to your phone through Apple’s push service; the matched spots are kept so the app can list them. The record of a phone that has not been seen for six months, or whose token Apple reports as no longer valid, is deleted automatically.

The donation button

It opens PayPal’s own page, and only if you press it. Neither the apps nor this site ever see payment details.

This website

A cookie named ly4a_lang remembers the language you picked, for a year. Nothing else is stored in your browser.

Downloads are counted: the total, the platform and the country. To find the country, the visitor’s address is passed to a public lookup service (ipapi.co, ip-api.com, ipwho.is or api.country.is), and only when a new download is counted. The address itself is never written down; what is kept is a short irreversible hash, deleted after six hours, whose only purpose is not to count the same person twice. It cannot be turned back into an address or a person.

The flags in the language row are images from flagcdn.com, so that service sees the address of anyone loading the page. The share and donation buttons are ordinary links and load nothing until pressed. There is no analytics and no advertising.

Deleting your data

Uninstalling the app removes everything it kept, on the phone and on the computer alike — there is no copy anywhere else. On this site there is nothing tied to a person that could be deleted. With any question about this, write to LY4A through qrz.com/db/LY4A. On iPhone, deleting the app makes its token invalid, so no more alarms can be sent; the record on ly4a.com is then removed automatically, or at once on request.

Changes

If any of this changes, the date below changes with it.

Updated: 4 September 2026  ·  Back to the app page  ·  qrz.com/db/LY4A