Land Area Measure privacy policy

Effective November 12, 2026

Land Area Measure is a free app for iPhone and Android and a web app at land.hertzmc.com that measures the area of land on a map or by walking its edge with GPS. It's made by Jayden Hertz. This page explains what it does with your information.

Your location

• The app uses your location only while it's open on your screen: to show where you are on the map and, when you tap Start walking, to trace the edge you walk.
• Your location is worked out and used on your phone (or in your browser). We never receive it, and the app doesn't track you in the background.
• If you're near Teton Valley, Idaho, the app shows one link to Darby Pit, a local gravel supplier. Whether you're near is decided on your phone; nothing is sent unless you tap the link, which simply opens darbypit.com.

The map and address search

• Maps and satellite photos come from Apple Maps. To show them, your phone or browser asks Apple's map servers for the part of the map you're looking at; like any internet request, that includes your IP address. See Apple's privacy policy.
• When you search for a place, what you type is sent to Apple to find it. We don't see your searches.
• On the web and in the Android app, the map gets a short-lived access pass from land.hertzmc.com. That request carries no location or shape.

What's saved on your phone

The areas you save, the shape you're working on, and your settings (units, gravel depth and weight, map type) are saved only on your phone or in your browser. We never receive them. Uninstalling the app (or clearing the site's data in your browser) deletes them. The Android app doesn't copy anything to a Google backup.

App updates

When the iPhone or Android app opens, it checks Expo's update service (expo.dev) for small fixes, so they arrive without a full store update. The check sends the app version, the phone's platform, a random ID made for your install and, like any internet request, your IP address. It never includes your location or shapes. See Expo's privacy policy.

Ads in the iPhone and Android apps

• The apps show one banner ad from Google AdMob. To show and measure ads and to prevent fraud, Google's software in the app collects some information from your device, such as its IP address (which gives a rough location, like your city), device and app details, an advertising identifier, and how you interact with ads. The app never gives Google your GPS location or your shapes. See how Google uses information from apps that use its services and Google's privacy policy.
• iPhone: the app asks Google for non-personalized ads only and never asks to track you.
• Android: ads may be personalized. You can reset or delete your advertising ID in your phone's Settings (Privacy → Ads, or Google → Ads).
• Where the law requires it (for example in the European Economic Area, the UK and Switzerland), the app asks for your choices before showing ads. You can change them any time in the app: tap i, then Ad privacy choices.
• The web app at land.hertzmc.com has no ads.

The website

land.hertzmc.com is delivered by Cloudflare, which counts page visits without cookies (Cloudflare Web Analytics). Measuring happens in your browser.

What the app doesn't do

No accounts or sign-up. No access to your contacts, photos, camera or microphone. We don't collect any personal information ourselves, and we don't sell your information.

Who else gets data

Only Apple (maps and search), Google (the ad), Expo (the update check) and Cloudflare (delivering the website) get the data described above. We use them because their privacy commitments protect your data at least as well as this policy does.

Keeping and deleting data

• We keep nothing about you on our own servers, so there's nothing on our side to delete.
• Saved areas and settings stay on your phone until you delete them or uninstall the app.
• Apple, Google, Expo and Cloudflare keep their data for as long as their own policies say (linked above). You can manage Google's ad data with the links above and, where it applies, Ad privacy choices in the app.
• To ask what data exists or to ask for anything to be deleted, email landarea@hertzmc.com. We'll answer and help you with the others if needed.

Children

Land Area Measure is not directed at children under 13, and we don't knowingly collect information from them.

Changes

If this policy changes, we'll update this page and the date at the top.

Contact

Questions? Email landarea@hertzmc.com.