A HELPING HAND FOR PARENTS

Hello from our little planet.

Questions about MathStar? Contact touchwaves@foxmail.com. Please include your device model, iOS version, app version and a short description. Do not include children's personal information.

How do I start?

Choose Classic, Space, Forest or Ocean on the home screen, then tap Start. In each round, select one of four answers. Results show correct answers, accuracy, stars and your best streak.

How do I change the difficulty?

Open Settings. Choose 0–9, 0–20, 0–50 or 0–100, or a custom upper limit from 5 to 999. Select addition, subtraction, multiplication and/or division, and choose 10, 15 or 20 questions. The selected range applies to operands, answers and answer choices.

Can I use it offline?

Yes. Practice, scoring and local progress work without an internet connection. An internet connection is needed to download the app or contact support.

Where is my progress?

Progress is saved on each device, without server-based sync or an account. Deleting the app and its data may remove it. Device backups are managed through your Apple device settings.

Price, purchases and availability

Planned US launch price: US$2.99, as a one-time purchase. Final local prices and availability are shown in the App Store. The current app has no ads, subscriptions or in-app purchases. A download link will be added once the public App Store listing is available. Apple handles billing and refunds: Apple purchase support.

Devices and languages

Requires iOS/iPadOS 26.0 or later on iPhone or iPad. In-app languages: Simplified Chinese, English, Spanish, French, German, Japanese, Korean, Portuguese, Russian, Arabic and Hindi. Select a language in Settings. Some text may fall back to English. Traditional Chinese marketing copy does not indicate a Traditional Chinese app interface.

Privacy

No account is required. Practice information stays on the device. Read the full privacy policy, also available from Settings → Privacy & support in the app.