Privacy policy

Effective October 3, 2026

Numstone has no accounts and does not send your play data to us. The free version shows ads from Google, which uses some device data to deliver them. Numstone Pro removes banner and full-screen ads.

What stays on your iPhone

Your times, stars, streak, shards, tile sets and settings are saved on your device. The Numstone home-screen widget reads the same data on the same device. None of it is sent to us. It may be included in your own device backups, and deleting the app deletes it.

What we collect

Nothing that identifies you. Numstone never asks for your name, email address, contacts, photos or location. The app has no analytics service, so we do not receive data about how you play.

Ads in the free version

The free version shows ads through Google AdMob. To deliver and measure ads, limit how often you see them and prevent fraud, Google may collect and process data such as your IP address (which indicates your general location), device identifiers, device and app information such as model, system version and language, and how you interact with ads. This data goes to Google, not to us. Google describes its practices in How Google uses information from sites or apps that use its services and in the Google Privacy Policy.

• Consent. Where the law requires it, for example in the European Economic Area, the United Kingdom and Switzerland, Numstone asks for your choice with Google's consent form before any ad is requested. You can change it at any time under Ad privacy choices in the app's Settings, which appears where consent is required.
• Tracking. Numstone does not ask for permission to track you across other companies' apps and websites, so Apple's advertising identifier is not shared with advertisers.
• Numstone Pro. Pro removes banner and full-screen ads. Reward ads are optional and play only when you choose to watch one.

Purchases

Purchases are handled by Apple. We never see your card or billing details. The app asks the App Store on your device what you have bought, so it can unlock it.

Reminders

If you allow notifications, Numstone schedules its reminders on your device. No server or push service is involved. You can turn them off in iPhone Settings, under Notifications, Numstone.

This website

numstone.app sets no cookies and shows no ads. It uses Cloudflare Web Analytics to count visits and measure page speed, which works without cookies and does not identify you. The warm-up board runs in your browser, and your best time is kept in your browser's local storage and never sent anywhere. The site is hosted by Cloudflare, which processes technical request data such as your IP address to deliver the site and protect it from abuse.

Email

If you write to hello@numstone.app, we use your address and message only to answer you, or to tell you when Numstone is out if that is what you asked for.

Children

Numstone is a general-audience game. We do not knowingly collect personal information from children.

Changes

If the app or this policy changes, we update this page and the date at the top.

Contact

Questions about privacy: hello@numstone.app.