Legal

Terms of Service

Last updated: October 11, 2026

These Terms of Service ("Terms") govern your access to and use of Delta-V Academy and any associated software, content, and features (collectively, the "Service"). The Service is provided by BuildingRome ("we", "us"). By accessing or using the Service, you agree to these Terms. If you do not agree, do not use the Service.

Educational use only. Everything shown is notional. Delta-V Academy is an instructional simulator. Every satellite, sensor, ground site, coverage cone, and scenario in the Service is notional: authored by us from publicly available open sources and simplified physics, chosen to illustrate a concept rather than to represent any real system's current state, performance, or tasking. The Service carries no live satellite catalog feed and does not track real objects in real time. Orbits are propagated with a two-body Keplerian model plus optional J2 secular corrections, which diverges from reality over time and does not integrate drag, solar radiation pressure, or general third-body dynamics. Replays may prescribe maneuvers and switch to simplified body-centered paths, including Moon-centered lunar orbits; these are authored demonstrations. It is not a flight-certified tool and must not be used for spacecraft operations, mission planning, collision avoidance, navigation, defense, regulatory filings, or any other safety-, finance-, or mission-critical purpose.
Active development. The Service is evolving. Features, lesson content, account tiers, and access rules may change. Changes to paid purchases are subject to Section 3. Lesson progress, account state, and any AI-generated content may be lost during a migration or rollback. Treat the Service as evolving educational software, not a stable product of record.

1. Eligibility

You may use the Service if you can form a binding contract with BuildingRome under applicable law. The Kids levels and Lesson 1 of every track are intended to be usable without an account. Creating an account and accessing the rest of the Service requires that you are at least 13 years old (or the equivalent age of digital consent in your jurisdiction). If you are under that age, you may use the Service only with the involvement of a parent, teacher, or legal guardian who agrees to these Terms on your behalf.

2. Accounts

Most of the Service requires a free account. You can create an account using email + password, Sign in with Apple, or Google sign-in through Firebase Authentication. You agree to:

  • Provide a valid email address you control;
  • Keep your password confidential and not share your account with others;
  • Notify us promptly if you suspect unauthorized access;
  • Be responsible for activity that occurs under your account.

We may suspend or terminate accounts that violate these Terms, abuse rate limits, attempt to bypass gating, or use automated clients to extract content. You can delete your own account at any time by emailing info@buildingrome.dev from the email address on file. See the Privacy Policy for the data we delete and the timeline.

3. Plans, Pricing, and Payment

The Service offers free access and optional paid plans. Intermediate and Advanced lessons beyond Lesson 1 require Pro, Lifetime, or an eligible educational grant. A free account does not unlock all content. Prices below are web prices in US dollars.

  • Free — $0: all Kids and Novice lessons, Lesson 1 of Intermediate and Advanced, 3 AI Mission Architect generations per day, and a sandbox of up to 15 objects. Kids lessons and Lesson 1 of every track are available without an account; further Novice lessons and AI require sign-in.
  • Pro — $8.99/month or $69/year: all lesson tracks, scenario exports, the Walker constellation builder, a sandbox of up to 200 objects, and 40 AI Mission Architect generations per day. Annual subscriptions are billed as one $69 payment each year.
  • Lifetime — $149 once: the same product features as Pro, with 15 AI Mission Architect generations per day. This purchase does not renew or create a recurring charge.
  • Classroom — $9 per seat per year, minimum 15 seats:access and seat allocation are specified in the school's order. Verified educator grants are separate from paid classroom seats. Additional institutional services are included only when stated in the order.

No plan includes unlimited AI. Allowances apply per account and unused generations do not accumulate. The allowance counts generation and refinement attempts, including requests the model cannot complete. AI availability depends on third-party services. Features and purchase options are available only where offered in the app or checkout; planned services are not included unless expressly listed in your purchase.

Lifetime means access to the included features for as long as we operate this product, subject to these Terms. It does not promise perpetual operation, unlimited AI, or every future separately sold product. Buying Lifetime does not automatically cancel an existing subscription; cancel that subscription with its billing provider to avoid further renewals.

Web purchases are processed by Stripe. In-app purchases are processed by Apple or Google Play and managed through RevenueCat. Store prices, currency, taxes, and available offers may differ from web prices. Review the total, billing period, and trial terms shown before confirming a purchase. Use the account you intend to receive access.

Pro subscriptions renew automatically at the applicable monthly or annual price until canceled. A 7-day free trial is available only when offered at checkout and subject to the provider's eligibility rules. Unless canceled before the displayed deadline, the trial converts to the selected paid subscription. Lifetime has no subscription trial.

Manage web subscriptions through "Manage billing & subscriptions" in your account menu. Manage Apple or Google Play subscriptions through that store's subscription settings. Cancellation stops future renewals; paid access ordinarily continues through the current paid period. Deleting your account or uninstalling the app does not itself cancel store subscriptions. Use "Restore purchase" in the native app to restore eligible purchases associated with your store account.

For web billing errors or refund requests, contact info@buildingrome.dev. Store purchases are subject to the applicable store's refund process: Apple billing support or Google Play refunds. Cancellation alone does not issue a refund. Nothing in these Terms limits mandatory consumer cancellation, refund, or other statutory rights.

Price changes apply to future purchases or renewals, with notice and any consent required by applicable law and the billing provider. Updating this page does not retroactively change an existing charge. Existing subscriptions follow the price and renewal terms communicated by their billing provider.

Voluntary support at /support is separate from product purchases and unlocks no features. Contributions may be one-time or recurring and are processed by Stripe. They are not tax-deductible while the Service is operated by BuildingRome Studio LLC. Recurring support can be canceled through the Stripe billing portal.

4. Educational and Instructional Purpose

The Service exists to teach orbital mechanics. Lessons, simulations, telemetry readouts, ground tracks, sensor models, and constellation builds are approximations intended for learning. They are not a substitute for engineering analysis, mission design software, certified propagators, or operational decision support.

Sensors and coverage are schematic.Where the Service names a real sensor, ground site, or spacecraft program, it does so only as an educational reference point. Fields of view, ranges, detection thresholds, signal-to-noise readouts, dwell timers, track states, and coverage footprints are notional figures we selected to make a geometric idea visible. They are not the real system's parameters, are not derived from any operator, and must not be read as showing what any real sensor can or cannot see, is or is not observing, or has or has not been tasked to do.

You agree not to rely on the Service for any of the following:

  • Real-world spacecraft command, navigation, or station-keeping decisions.
  • Conjunction assessment, collision avoidance, or maneuver planning for live assets.
  • Launch licensing, frequency coordination, or any regulatory submission.
  • Defense, intelligence, targeting, or operational space domain awareness.
  • Insurance, financial, investment, or due-diligence determinations.
  • Any decision where errors could result in injury, loss of life, property damage, financial loss, or legal exposure.

5. Open Data and Source Materials

Reference values, orbital elements, ground station coordinates, sensor parameters, and historical mission data shown in the Service were authored by us using publicly available open sources. These include published catalogs and reference values such as CelesTrak and Space-Track, NASA, ESA, the FCC, ITU filings, peer-reviewed literature, and similar open publications.

These values are transcribed and simplified into the Service as static, notional element sets. The Service does not connect to, query, mirror, or redistribute any satellite catalog, and the figures shown are not live. They reflect nominal or representative values at the time we wrote them and will drift from any real object. We do not claim ownership of upstream data and provide no guarantee that any value is current, complete, or accurate. Operational data should always be sourced directly from authoritative providers.

6. AI-Generated Content

The AI Mission Architect uses third-party large language models (currently Google Gemini) to translate natural-language prompts into simulator configurations. AI output may be incorrect, incomplete, or physically implausible. Treat generated missions as creative starting points for exploration, never as engineering artifacts. You are responsible for what you submit to the Architect and must not include confidential, proprietary, export-controlled, or otherwise sensitive information. Architect access is rate-limited per account and per IP; abuse may result in suspension.

7. Disclaimer of Warranties

THE SERVICE IS PROVIDED "AS IS" AND "AS AVAILABLE" WITHOUT WARRANTIES OF ANY KIND, EITHER EXPRESS OR IMPLIED. To the fullest extent permitted by law, BuildingRome disclaims all warranties, including merchantability, fitness for a particular purpose, non-infringement, accuracy, completeness, reliability, availability, freedom from defects, and freedom from harmful components. We do not warrant that calculations, ground tracks, sensor coverage, conjunctions, or any other simulator output is accurate or fit for any specific use.

8. Limitation of Liability

TO THE FULLEST EXTENT PERMITTED BY APPLICABLE LAW, BUILDINGROME, ITS AFFILIATES, CONTRIBUTORS, AND LICENSORS WILL NOT BE LIABLE FOR ANY INDIRECT, INCIDENTAL, SPECIAL, CONSEQUENTIAL, EXEMPLARY, OR PUNITIVE DAMAGES, OR FOR ANY LOSS OF PROFITS, REVENUE, DATA, GOODWILL, MISSION CAPABILITY, OR OPPORTUNITY, ARISING OUT OF OR RELATED TO YOUR USE OF OR INABILITY TO USE THE SERVICE, REGARDLESS OF THE LEGAL THEORY AND EVEN IF WE HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.

Our aggregate liability for any claim arising out of or relating to the Service is limited to one hundred US dollars (US $100), or the amount you paid us to use the Service in the twelve months preceding the claim, whichever is greater. Some jurisdictions do not allow certain limitations, so portions of this section may not apply to you.

9. Indemnification

You agree to defend, indemnify, and hold harmless BuildingRome and its affiliates from any claim, demand, loss, or expense (including reasonable attorneys' fees) arising out of (a) your use or misuse of the Service, (b) your violation of these Terms, (c) your violation of any law or third-party right, or (d) any decision or action taken in reliance on output from the Service.

10. Acceptable Use

You agree not to:

  • Use the Service for any unlawful purpose or in violation of export-control or sanctions laws.
  • Reverse engineer, decompile, or attempt to extract the source code beyond what is permitted by applicable open-source licenses.
  • Probe, scan, overload, disrupt, or attempt to gain unauthorized access to the Service or its hosting infrastructure.
  • Bypass or attempt to bypass account gating, rate limits, lesson access controls, or any other security or quota mechanism.
  • Create accounts in bulk, share accounts across users, or use automation to consume the AI Architect quota.
  • Submit prompts or content that are unlawful, harassing, infringing, or that contain personal data of third parties.
  • Use the Service to develop a competing product through scraping, automated extraction, or model training without our written permission.
  • Misrepresent simulator output as authoritative, certified, or operational data.

11. Intellectual Property

The Delta-V Academy name, logo, lesson narrative, and original code are owned by BuildingRome and protected by intellectual property laws. Open-source components remain governed by their respective licenses. You may take screenshots and screen recordings of the Service for personal, educational, journalistic, or fair-use purposes, including with the attribution overlay produced by the capture tool. Other commercial reuse requires our written permission.

12. Third-Party Services

The Service depends on third parties including Vercel (hosting and performance analytics), Firebase (authentication and Firestore database, by Google), PostHog (product analytics and event tracking), Google (Gemini API for AI Architect), and Stripe (web payments and billing portal), RevenueCat (purchase entitlements), and Apple and Google Play (in-app purchases). Your use of those services through the Service is also subject to their terms and policies. We are not responsible for third-party service outages, errors, or changes.

13. Privacy

Our handling of information is described in the Privacy Policy, which is incorporated by reference into these Terms. The Privacy Policy describes how to request data export and account deletion.

14. Modifications to the Service and Terms

We may add, change, or remove features, subject to the purchase commitments and price-change provisions in Section 3 and applicable law. We may also update these Terms. Material changes will be signaled by updating the "Last updated" date above and, where appropriate, by emailing signed-in users. Continued use of the Service after a change means you accept the revised Terms.

15. Termination

We may suspend or terminate your access to the Service at any time for any reason, including violation of these Terms. You may stop using the Service or delete your account at any time. The sections that by their nature should survive termination (including liability, indemnification, intellectual property, and governing law) will survive.

16. Governing Law and Disputes

These Terms are governed by the laws of the State of Florida, United States, without regard to conflict-of-laws principles. Any dispute arising out of or relating to these Terms or the Service will be brought exclusively in the state or federal courts located in Florida, and you consent to personal jurisdiction there. To the extent permitted by law, you and BuildingRome waive any right to a jury trial and to participate in a class action.

17. Severability and Entire Agreement

If any provision of these Terms is held unenforceable, the remaining provisions remain in effect. These Terms, together with the Privacy Policy, constitute the entire agreement between you and BuildingRome regarding the Service and supersede prior agreements on the subject.

18. Contact

Questions about these Terms can be sent to info@buildingrome.dev. See the Contact page for more options.