Privacy Policy.

Last updated 27 October 2026

Courtside is a tennis app for your phone and Wear OS watch. We collect as little as we can. This page explains what we hold, why, and how you stay in control. Courtside is operated by Michal Vondra, Křižíkova 176/27, Prague, Czech Republic, Business ID (IČO) 87343401 — the data controller for everything described here. Reach us any time at info@courtside.cz.

Using Courtside without an account

You can browse schedules, results and live scores without signing in. In that case we hold a record of this device and a push ID, but never your name or email. You can clear it whenever you like: Settings → My data → Delete my data, no account needed. That erases what we hold for this phone: the matches, players and tournaments you follow, your draw reminders, your notification history and what you've seen in What's new. The app keeps working. The next time you open it, it registers this phone with us again and sends the same push ID as before. If you have notifications on, you get alerts for anything you follow from then on.

What we collect and why

• Account — if you sign in with Google, we store your email and a Google account identifier so we can recognise you and keep the matches and players you follow on every phone you sign in on.
• Push ID — the identifier Firebase Cloud Messaging uses to reach your device (the Firebase installation ID; older app versions use a messaging token). We register it whether or not notifications are on, because it also delivers live scores to your widget and your watch, and the alerts you asked for.
• IP address — every request from the app reaches our server with your IP address. We use it only to stop abuse, like someone flooding the server or registering fake devices, and we delete it within two days. Our hosting provider also keeps standard server logs, which include IP addresses.
• Device check — when the app registers your phone, it asks Google Play Integrity to confirm that Courtside came from Google Play and runs on a genuine, certified phone. We only receive the answer.
• Your picks — the matches and players you follow and your alert preferences. This is the app doing its job.
• Calendar link — if you're signed in and open Add to calendar, we create a private link to a calendar of your followed matches. Anyone who has the link can see those matches, so treat it like a password. Your calendar service downloads it regularly, and like every request, those downloads appear in our hosting provider's server logs. Signing out doesn't switch the link off. Deleting your account does. If the link has reached someone it shouldn't have, write to us and we'll replace it.
• Your device's time zone — so match times show in your local time, and alerts don't arrive in the middle of your night.
• What you've seen in What's new — an unreadable fingerprint of each story, article and match the screen showed this phone, so the dot only lights up for something new.
• Subscription — if you get Pro, we record that you have Pro and until when, plus what Google Play tells us about your subscription and its orders: the order number, amount, currency, billing period, whether it renews, and the purchase token Google Play uses to identify it. We never see your card.
• Marketing consent — only if you opt in. Off by default, and you can switch it off any time in Settings. It lets us send you tennis tips and occasional offers by notification or email. We record when it was granted, when it was withdrawn, and which wording you agreed to.
• Diagnostics — crash and error reports to help us fix bugs. They carry technical details and, for some errors, the random ID of your account or device, never your name or email.
• Usage analytics — only if you allow it. In the EU, the UK and Switzerland we ask first and collect nothing until you say yes. Elsewhere it's on until you switch it off. Google also uses it to measure our ad campaigns. It tells us which link or campaign brought you to Courtside, which screens and features you use, what you searched for when nothing turned up, and your phone model and country. It never includes your name or email, the players or matches you follow, or your advertising ID. We also store the link or campaign with your device's record, to see which campaigns bring people who stay.
• What you write to us — if you send feedback or report a wrong score, we get the text you typed, stored with our diagnostics. Your email address stays out of it, so we can't write back; leave it in the message only if you want us to have it.

Legal basis (GDPR)

• Providing the app — performance of our agreement with you and our legitimate interest in a working product.
• Protecting the service — IP addresses, server logs and the device check rest on our legitimate interest in keeping Courtside safe from abuse.
• Marketing messages — your consent, whether they reach you by notification or email, which you can withdraw at any time.
• Usage analytics — in the EU, the UK and Switzerland your consent, which you can withdraw at any time. Elsewhere our legitimate interest in improving the app, and you can switch it off at any time.
• Payments and subscriptions — performance of our agreement with you, and our legal obligation to keep accounting records.

Who we share it with

We don't sell your data. We use a small set of processors to run the app:

• Google — sign-in with your Google account, and the Play Integrity device check.
• Google Firebase — push notification delivery.
• Google Analytics for Firebase — usage analytics, only if you allow it. We've switched off Google's own use of this data. A copy of the analytics events goes to our Google Cloud project in the EU, where we analyse it.
• Google Play — takes the payment for Pro and tells us about renewals, cancellations and refunds. When you buy Pro, we send Google Play a random ID for your account, so we can match the payment to you. We never send your email.
• Sentry — crash and error diagnostics, and the feedback you send us.
• Our hosting provider — runs our servers and database in the EU.
• Google Cloud — stores encrypted database backups in the EU. Google can't read them.

If you add your calendar link to Google Calendar, Apple Calendar, Outlook or another calendar service, that service downloads your followed matches under its own privacy policy. You choose it, and you can remove the calendar there at any time. What it has already downloaded stays there until you remove the calendar.

Match schedules, draws and scores come from the tours' own public sources. We fetch them ourselves — nobody on that side receives any of your personal data. News articles are the exception you choose: tap one and it opens on the tour's own website, in your browser, under that website's privacy policy.

How long we keep it

• Your account — we keep it until you delete it, with the two exceptions below.
• Your device — if a device doesn't contact us for a year, say because you uninstalled the app, we delete its record and everything it held: the matches and players and tournaments you follow, your draw reminders and your notification history.
• An account left with no devices — erased along with the last one, unless your marketing consent is still active. In that case we keep only your email address and the record of that consent, so we can write to you as you asked. Ask us to delete you and that goes too. If you still pay for Pro, we keep the whole account, including what you follow, because you are still paying for it.
• An account that had Pro through Google Play — once the subscription has ended and no device is signed in to the account, we erase it a year after the subscription ended. This applies even if you simply signed out rather than uninstalled the app. If your marketing consent is still active, we keep only your email address and the record of that consent, as above. Sign in again within that year and nothing is erased.
• Calendar link — as long as your account. Deleting your account switches the link off at once.
• IP addresses in abuse protection — up to two days, then removed automatically.
• What you've seen in What's new — a few days, then removed automatically, and at once when you delete your data.
• Server logs — our hosting provider keeps them in monthly archives, and we delete each archive a week after its month ends. A log entry is gone within about 40 days.
• Diagnostics and feedback — kept in Sentry for 30 days, then deleted automatically. Deleting your account doesn't remove them sooner, but they hold no name or email.
• Usage analytics — Google Analytics and our copy keep the events for 14 months, then delete them automatically. Switching analytics off or deleting your data stops collection at once and gives this phone a new analytics identity, but events already sent stay until they age out. The link or campaign stored with your device's record goes when you switch analytics off, delete your data, or the device record is deleted.
• Notification delivery logs — up to 30 days for reliability, then removed automatically. The queue we send them from keeps a device reference for the same 30 days; it's what stops us sending you the same alert twice.
• Payment records — kept for as long as accounting law requires, but detached from you when you delete your account.
• Subscription record — when you delete your account, we keep the record, including the purchase token, and remove your account from it. A year after the subscription ends, we delete the purchase token too and keep only details that don't identify you (dates, status and plan) for statistics. Deleting your account doesn't cancel your subscription in Google Play. If the subscription keeps running, the next Courtside account that signs in on a phone with the Google Play account that pays for it gets Pro.
• Messages from Google Play about your subscription — kept for 90 days, so we can check a payment problem. Then we delete them automatically.
• Backups — we back the database up nightly and keep a week of them, so anything you delete can survive in a backup for up to seven days before it ages out. One copy stays on our server, and an encrypted copy goes to Google Cloud in the EU, where only we hold the key to read it.

Your rights

You can, at any time:

• Export your data — Settings → My account and data → Export my data.
• Delete your account — Settings → My account and data → Delete account, or see how to delete your account. It's permanent and starts you from scratch.
• Delete your data without an account — if you never signed in: Settings → My data → Delete my data. Signed in? Delete the account instead — that covers every device.
• Switch off usage analytics — Settings → My account and data → Usage analytics (Settings → My data if you never signed in).
• Withdraw marketing consent — Settings → Notifications → News and tips. If you no longer have the app, email us and we'll erase you.
• Ask us for access or correction by emailing info@courtside.cz.

If you're in the EU, you also have the right to complain to your local data protection authority.

Children

Courtside isn't directed at children under 13, and we don't knowingly collect their data.

Changes

If we change this policy, we'll update the date above and, for anything material, let you know in the app.