Terms of Use

Version 2026-11-14 · Star Viewer by XRainier, a trade name of Rainier Studio LLC

1. The service

Star Viewer shows the sky for a place and time. The free version needs no account. Star Viewer Pro adds features for people with an account and an active subscription or key.

2. Accounts

Keep your sign-in secure; you are responsible for activity on your account. One person per account. We may suspend accounts that abuse the service, try to break it, or resell access.

3. Pro, payments and cancellation

• Pro is sold monthly or yearly through Stripe at the price shown before you pay, and may start with a free trial. Subscriptions renew automatically until you cancel; cancelling stops the next renewal and Pro stays on until the end of the paid period.
• Keys and promotions add Pro time to one account, cannot be exchanged for money and may expire.
• If something goes wrong with a payment, write to support@xrainier.com; refunds follow the law where you live.

4. Accuracy and safety

Positions are calculated to roughly an arcminute and are meant for enjoyment and learning, not navigation or safety-critical use. Never look at the Sun, with or without optics. Watch your step when stargazing outdoors and in the dark.

5. Content and data

The app and its design belong to Rainier Studio LLC. Star data comes from the Hipparcos catalogue via the open-source d3-celestial project (BSD-3-Clause); star names follow the IAU Working Group on Star Names.

6. Liability

The service is provided “as is”. To the extent the law allows, Rainier Studio LLC is not liable for indirect or consequential losses, and our total liability is limited to what you paid us in the last 12 months.

7. Changes and contact

We may update these terms; the version date above changes and signed-in users are asked to accept the new version. These terms are governed by the laws of the State of Washington, USA. Contact: support@xrainier.com.