Tiremath: Tire Size Calculator
This policy explains how Tiremath: Tire Size Calculator ("the app") handles information when you use it. Kivora ("we", "us") develops and publishes the app.
Tiremath works out every figure on the device from the size you type. It downloads nothing, has no tire database, and asks for no permissions beyond internet access for ads.
The results are arithmetic, not fitting advice. Whether a size suits your car depends on your wheels, arches, brakes and the vehicle handbook, so check with a tire professional before fitting anything.
At a glance
| Does the app require an account or sign-in? | No |
|---|---|
| Do we collect your name, email or phone number? | No |
| Do we collect your location? | No |
| Do we access your contacts, photos, camera or microphone? | No |
| Does the app send what you type to a server? | No |
| Does the app show third-party ads? | Yes — Google AdMob |
| Do we sell or share personal information? | No |
Information you give us
Nothing. The app has no sign-up, no login and no profile. We never ask you for your name, email address, phone number, date of birth or payment details, and there is no way to send them to us through the app.
Information stored on your device
The two tire sizes in the boxes, whether you prefer metric or imperial units and km/h or mph, whether the tires are drawn overlaid or side by side, and your last ten comparisons are saved on your device so the app opens where you left it. A count of how many comparisons you have made is kept the same way, only to decide when a full-screen ad may be shown. None of it leaves your device, and you can erase it at any time by clearing the app's storage or uninstalling the app.
We cannot see this information. It stays on your phone, and uninstalling the app removes it.
Advertising
The app is free, and ads pay for it. Ads are served by Google AdMob. The app is configured to request non-personalised ads only, which means the ads you see are not based on your interests or your browsing history. To choose an ad and to measure whether it worked, Google's advertising SDK still collects a limited amount of technical information directly from your device, typically including:
- your device's advertising ID, a resettable identifier that is not tied to your name
- your approximate, city-level location, derived from your IP address
- basic device and app information, such as device model, operating system version and app version
- whether an ad was shown, viewed or tapped
This information goes to Google, not to us. We only ever see anonymous, aggregated totals — such as how many ads were shown yesterday — and never anything that identifies you. Google's use of this data is governed by how Google uses information from sites or apps that use its services and by the AdMob policies.
Your choices about ads
- Reset or delete your advertising ID. On Android, open Settings → Privacy → Ads (the exact path varies by device) to reset it, or to delete it entirely.
- Turn off ad personalisation. The same settings screen lets you opt out across every app on your device. You will still see ads, but they will not be based on your interests.
- Nothing to opt out of for personalisation. Because this app already requests non-personalised ads only, your interests are not used to select the ads it shows you.
Analytics and tracking
We do not use any separate analytics product. We do not track you across other apps or websites, and we do not build a profile of who you are or what you do.
Sharing your information
We do not sell, rent or trade personal information, and we never will. Beyond the service providers named above, we share information only where the law requires it — for example, in response to a valid legal request.
Children's privacy
The app is not directed at children under 13, and we do not knowingly collect personal information from them. If you believe a child has provided us with personal information, contact us at info@expathub-all.com and we will delete it.
Your privacy rights
Depending on where you live — for example under the GDPR in the EEA and the UK, or the CCPA/CPRA in California — you may have the right to access, correct, delete or export the personal information a company holds about you, and to object to certain kinds of processing.
Because we hold no account and no record that identifies you, there is normally nothing for us to look up, correct or delete. For the device-level advertising data described above, Google acts as the data controller, and you can exercise your rights through your Google account and your device's ad settings. If you still have a request, write to info@expathub-all.com and we will help.
Data retention
We hold no personal information about you, so there is nothing for us to retain. Information kept on your device stays there until you clear the app's storage or uninstall the app.
Security
No method of transmission or storage is completely secure, but we take reasonable technical and organisational measures to protect the limited information involved.
International transfers
We are based in the Republic of Korea. The service providers described above may process data on servers in other countries, including the United States, under the safeguards set out in their own privacy policies.
Changes to this policy
If we change how the app handles information, we will update this page and change the "last updated" date at the top. Please check back from time to time.
Contact us
Questions, concerns or requests about this policy? Email info@expathub-all.com and we will reply as soon as we can.