Last updated: 11 November 2026
In short
LineProof is made by A Brand New Company (ABN). We collect nothing. No account, no ads, no analytics, no tracking. Your log stays on your device, and we never receive it. That is why the App Store says: Data Not Collected.
What stays on your device
Your log: when each check ran, every drop with its start, end and duration, what answered and whether you measured over Wi-Fi or a cable. Also what you type in yourself: your name, address, customer number and provider for the letter, your contacts with your provider, your marks and your settings.
All of it stays on this device and in your own backups (iCloud or your computer), which only you can reach. We cannot reach any of it.
The checks
Every 10 to 30 seconds (you choose), and every 5 seconds during a drop, the app asks a well-known address for a tiny answer: www.gstatic.com (Google) and cp.cloudflare.com (Cloudflare) in turn. When one fails, it also asks captive.apple.com (Apple), 1.1.1.1 and 8.8.8.8.
These requests carry nothing about you or your log. Like any website, those companies see your internet address when the request arrives.
Your router
To tell your home apart from the line, the app checks whether your own router answers. iOS asks your permission for the local network first. Only your router is checked, and nothing leaves your home network. You can turn it off any time in the Settings app.
Version check
Every few hours the app asks this website for a small file that says whether this version still works. If it is too old, the app asks you to update in the App Store; logging is never interrupted for it. The request contains nothing about you or your log. As with any website, our host Vercel sees the device's internet address in its server logs: see This website.
Notifications
If you turn on the reminder, the device itself schedules a notification when logging pauses. Nothing goes through a server.
Your report
A report leaves your device only when you share it yourself, through Mail or the share sheet, to the people you choose. We never see it.
The purchase
The full report is an in-app purchase that Apple handles. We never see your name or payment details. Apple only shows us sales and download figures that cannot be traced to you, and crash reports from people who chose to share them with developers.
Children
LineProof collects no data from children, or from anyone else.
Deleting
Delete all logs in the app's Settings, or delete the app to remove everything. There is nothing on our side to delete.
This website
This website uses no cookies, no analytics and no scripts or fonts from others. To deliver the page to you, our host Vercel Inc. processes technically necessary data, like your IP address, the page address and the time, in server logs. We do this on the basis of legitimate interest: without that data a website does not work and cannot be protected against abuse. We only look at the logs when something goes wrong, and we do not keep or export them. Vercel keeps them a short while for security, under its own privacy policy.
Vercel is an American company, so data may go to the United States. Vercel is certified under the EU-US Data Privacy Framework, which allows that transfer under the GDPR. Cloudflare Inc. only answers DNS lookups for this domain: it points your browser to Vercel. Your visits to the pages themselves never pass through Cloudflare.
If you email us, we use your address and message only to answer you, also on the basis of legitimate interest. We keep the email while your question is open and at most a year after, and delete it sooner if you ask.
Who is responsible
A Brand New Company (ABN), Volume 88, 1446 WJ Purmerend, the Netherlands. Chamber of Commerce (KvK) 88565548. Email info@abn.company.
Because the app collects nothing, there is nothing about your use of the app for us to show, correct or erase. If you emailed us, you can always ask to see or delete that email. You also have the right to complain to the Dutch Data Protection Authority (Autoriteit Persoonsgegevens).
Changes
If this policy changes, we update this page and the date at the top. If the app ever starts collecting anything, we will say so beforehand, in the app and in the App Store.