Terms of Service
Version 2026-09-19 · Effective 19 September 2026
These terms describe your use of Amadeus Universe at www.amadeusuniverse.com and purchases of its memberships. Contact the service operator at amadeusplaystudios@gmail.com for account, payment, cancellation or refund questions.
1. The service and your account
Amadeus Universe is an educational astronomy atlas with visualisations and simulations. Sign in with a supported provider to create an account. Your provider name and avatar may be imported; you can change your display profile. Keep your sign-in account secure and use the same Amadeus account for purchasing and accessing a membership. Different sign-in providers may create separate accounts.
You must be legally able to enter this agreement and authorise the payment, or have the necessary permission from a parent or legal guardian. You are responsible for activity you authorise through your account; contact support if you suspect unauthorised access.
2. Free, Pro and Pro+
Free includes the Solar System and Earth sky viewer. Access beyond the Solar System, live tracking, artificial satellites and the other simulators requires Pro or Pro+.
Pro: US$2.99 per month. When paid through Stripe as a monthly subscription, it renews automatically every month until cancelled. By choosing this option and completing payment, you authorise the recurring charges shown at checkout.
When Pro is paid with cryptocurrency, it is a one-time purchase of one calendar month, with no automatic charge or renewal. Confirmed additional months extend the remaining prepaid period. A calendar month is not always 30 days; dates at the end of a month are adjusted to the last valid day of the next month.
Pro+: US$19.99 once. It provides the same paid features without a recurring fee or scheduled expiry for the lifetime of the Amadeus Universe service. It is not a promise that the service will operate forever or that every possible future product will be included. We will not convert an existing Pro+ purchase into a monthly subscription without your agreement.
3. Payment and activation
Check your account, plan, price, currency and payment method before paying. Any additional charges collected by us will be shown before payment. Your bank, exchange or wallet may apply its own conversion or transfer fees.
Access starts after the server verifies the payment. A return to the website, a screenshot or a transaction submission alone is not confirmation. Cryptocurrency payments require the coin, network, address and amount shown on the payment page, with the required blockchain confirmations. Allow enough time for exchange withdrawals and invoice expiry. A transfer on the wrong network or to the wrong address may be unrecoverable.
If your payment has completed but access remains pending, use the payment check in your account or contact support with the order number or public transaction ID. Do not pay again just to clear a pending status. Available payment providers, currencies and networks are shown at checkout and can change.
4. Cancellation and refunds
Cancel a Stripe monthly subscription through the subscription management link in your Amadeus account before the next renewal. Cancellation stops future renewals; access normally remains until the end of the paid billing period. Cancellation alone does not automatically refund a completed payment. Contact support if you cannot access subscription management.
Prepaid cryptocurrency Pro and Pro+ do not renew automatically, so there is no recurring charge to cancel. To request a refund, email support with your account and order reference, payment date and reason. Do not send passwords, card security codes, private keys or wallet recovery phrases.
We investigate duplicate or incorrect charges, confirmed payments without the promised access, and other service issues, and provide a correction or refund where appropriate. Other refund requests are assessed individually, subject to applicable consumer rights. Approved card refunds are returned through the original payment provider. Cryptocurrency refunds require verification of the original payment and a compatible destination; any applicable network costs and the proposed return amount will be explained before processing.
Nothing in these terms removes any mandatory cancellation, withdrawal, refund or other consumer right. Starting access or accepting this checkbox does not by itself waive such rights. Refunded or reversed payments may result in removal of the corresponding paid access, subject to those rights.
5. Acceptable use and content
Your membership gives you access to use the service; it does not transfer ownership of its software or artwork. Do not bypass paid access controls, distribute an account for unauthorised shared access, attack the service or use it unlawfully. Third-party astronomical data and assets remain subject to their respective licences and attribution requirements; these terms do not claim exclusive ownership of public scientific facts.
Catalog measurements can be incomplete or uncertain. Simulations include approximations and illustrative effects and are not guaranteed engineering, navigation or safety calculations. We aim to correct errors and keep the service usable, but cannot promise uninterrupted availability.
6. Account and payment records
To provide access, we process your sign-in provider identifier, display profile, session information, orders, payment references, subscription status and acceptance of these terms. Login and payment providers process their part of the interaction under their own policies. We do not receive your social account password or store your complete card number or card security code.
The website uses session cookies and local storage for sign-in, preferences and cached catalog data. Necessary hosting and security logs help diagnose failures and prevent abuse. Information you send to support is used to handle your request. Contact support to request access to, correction of or deletion of your account information; some transaction and consent records may need to be retained for applicable obligations or dispute resolution. This purchase checkbox is not consent to marketing messages.
7. Changes, suspension and contact
We may update features and these terms. Material changes affecting an existing paid membership will be communicated before taking effect where required; updated purchase terms are presented before a new order. The version accepted for each order is recorded. A later version does not retroactively change the price or terms of a completed purchase.
Access may be restricted for a material breach, fraud or a legal requirement. Where practical, we will explain the issue and provide a way to contact support. Planned permanent closure will be announced in advance where reasonably possible, and applicable customer remedies will be respected. These terms do not exclude liability or rights that cannot lawfully be excluded.
Both language versions are intended to have the same meaning. If anything is unclear, contact amadeusplaystudios@gmail.com before purchasing.