Terms of service
Last updated: 2026-07-03 · Contact: hello@aerolab.to
1. Who we are, and what these terms cover
AeroLab (aerolab.to and app.aerolab.to, the “Service”) is operated by Outrange Systems GmbH, a limited-liability company registered in Switzerland (“we”, “us”). These terms govern all use of the Service — with or without an account. By using the Service you accept them. If you use the Service for an organisation, you confirm you are authorised to accept these terms on its behalf.
2. The Service
AeroLab is a browser-based estimation and simulation tool for the preliminary design of small fixed-wing unmanned aircraft. Part of the Service is free to use; certain parameters and server-side computations (“Runs”) are premium features that require a signed-in account and prepaid Credits. We may change which features are free and which are premium, and may add, change or remove features at any time. Credits you have purchased remain usable for Runs (section 4).
3. Accounts
You must provide accurate information, keep your sign-in credentials secure, and not share your account. One account per person. You must be able to form a legally binding contract; purchases require that you are at least 18 or have your legal guardian's consent. We may suspend an account to protect the Service or other users, and may terminate accounts that breach these terms.
4. Credits and payment
Premium usage is prepaid: you top up a Wallet with Credits, and each Run debits the Credit price shown before you start it. Credits are denominated in whole units, are not money, carry no cash value and no interest, and are not transferable between accounts or redeemable except as described in the refund policy below. Credits are valid for 24 months from purchase. Prices (both the price of Credit packs and the Credit price of a Run) may change; changes never affect Runs you have already paid for. Payment is processed by Stripe — we never see your card details. Displayed prices include VAT where applicable; you are responsible for any taxes we are not required to collect.
If a Run fails on our side, the debited Credits are refunded to your Wallet automatically. We keep a full, permanent ledger of all Credit movements; the ledger is authoritative for your balance.
5. Refund policy
Unused Credit purchases: within 14 days of a purchase, if you have not spent any of the purchased Credits, you may withdraw from that purchase and we will refund it in full to the original payment method — email hello@aerolab.to from the account's address. By spending Credits from a purchase within the 14-day period you request immediate performance and acknowledge that the right of withdrawal lapses for that purchase.
Everything else: spent Credits, purchases older than 14 days and promotional or free Credits are non-refundable, except where the law of your country of residence mandatorily provides otherwise, and except for the automatic failed-Run refunds and the discontinuation refund in section 9. Initiating a card chargeback for a purchase that these terms do not make refundable may lead to suspension of the account while the dispute is resolved.
6. Acceptable use
You must not:
- circumvent or attempt to circumvent technical restrictions of the Service, including the separation of free and premium features;
- access the Service by automated means (scraping, bulk API calls) except for the interfaces we expose to you as a signed-in user;
- probe, disrupt or overload the Service, or interfere with other users;
- reverse engineer the Service except to the extent a mandatory law allows it;
- resell or commercially redistribute the Service or Runs without our written agreement; or
- use the Service for unlawful purposes, or in violation of export-control or sanctions rules applicable to you.
7. Results are estimates — no engineering advice
AeroLab evaluates simplified analytic models. Its outputs are theoretical estimates for preliminary study and education. They are not engineering advice, not a certification basis, and no substitute for professional engineering analysis, wind-tunnel or flight testing. We do not warrant that results are accurate, complete or fit for any particular aircraft or purpose.
You are solely responsible for independently verifying any design before building, testing or operating it; for the airworthiness and safe operation of anything you build; and for compliance with the aviation and unmanned-aircraft regulations that apply to you. The Service must not be used as a basis for manned aviation or for any safety-critical decision. To the extent permitted by law, you will indemnify us against third-party claims arising from aircraft or products you design, build or operate.
8. Your designs, our software
The Service, its software, models, catalogs and content are ours or our licensors' and are protected by law; these terms give you only a personal, non-exclusive, non-transferable right to use the Service. Parameter configurations you create remain yours. You grant us the right to store and process them to operate, secure and improve the Service, and — only with your separate opt-in consent — to send you tailored offers, all as described in the privacy policy.
9. Availability and changes
The Service is provided “as is” and “as available”. We do not guarantee uninterrupted availability and may perform maintenance at any time. We may modify or discontinue the Service or parts of it; if we permanently discontinue paid Runs, we will refund the unused, purchased Credits remaining in your Wallet.
10. Liability
To the maximum extent permitted by law: we are not liable for indirect or consequential damage, loss of profit, loss of data, or damage arising from reliance on simulation results (section 7); and our total liability from or in connection with the Service is limited to the amounts you paid us in the 12 months before the event giving rise to the claim. Nothing in these terms excludes or limits liability for intent or gross negligence, for personal injury, or any other liability that cannot be excluded under applicable law. Statutory consumer rights in your country of residence remain unaffected.
11. Termination
You may stop using the Service and request deletion of your account at any time (billing records we must legally retain are kept). We may terminate or suspend your access for breach of these terms; Credits are not refunded on termination for breach. If we terminate your account without cause, we refund the unused, purchased Credits in your Wallet.
12. Changes to these terms
We may update these terms. For material changes we will give account holders advance notice by email or in the app. Continued use of the Service after a change takes effect constitutes acceptance; if you do not accept, stop using the Service and — for material changes to paid features — contact us within 30 days of the notice for a refund of unused, purchased Credits.
13. Governing law and jurisdiction
These terms are governed by Swiss substantive law, excluding its conflict-of-law rules and the UN Convention on Contracts for the International Sale of Goods. Exclusive place of jurisdiction is Hünenberg (ZG), Switzerland, the registered seat of Outrange Systems GmbH — subject to mandatory consumer jurisdictions. If a provision of these terms is found invalid, the remainder stays in force.