Legal

Support the project

Delta-V Academy is free for every learner. Every lesson, every level, every simulation, every replay. There is no paywall on the curriculum and there will not be one.

If the project is useful to you and you would like it to keep existing, voluntary support is the way. It funds the things that actually cost money: hosting, the Firebase tier, the AI APIs that power the Mission Architect, and (eventually) the AI Coach.

Pick any amount on the next page. The default is $25. Min $1, max $10,000. Apple Pay, Card, Klarna, Cash App, and Amazon Pay all work.

Send a one-time gift →

Processed by Stripe. Voluntary; not tax-deductible while Delta-V Academy is operated by BuildingRome Studio LLC. Recurring contributions can be canceled any time from the Stripe receipt email or your account menu.

Use AI a lot? Upgrade to AI Pro

AI Pro is a separate, optional subscription that lifts the daily AI cap. Use it if you find yourself running out of free Architect runs. The free tier stays generous: 3 Architect runs per day, 5 Coach questions per day (when shipped). AI Pro is for the people who want to stay in the seat for hours.

AI Pro · Unlimited AI

Free signed-in users get 3 AI Mission Architect runs per day (and 5 AI Coach questions per day when shipped). AI Pro lifts both caps to unlimited. Cancel any time.

Monthly
$5/ month
Cancel any time
Save ~17%
Yearly
$50/ year
$4.17/mo, billed annually

Processed by Stripe. AI Pro subscription is separate from voluntary support contributions; both flows can coexist on the same account.

What support pays for

  • Vercel + Firestore + domain (about $40/month, scales with traffic)
  • AI API calls (Gemini for the Architect today; Claude Haiku for the Coach when it ships). The free 3-Architect-runs-per-day allowance for every signed-in user is included.
  • Adding new lessons, replays, and missions
  • Mobile + accessibility polish

Honest disclosure

Delta-V Academy is operated by BuildingRome Studio LLC, a US for-profit company. Contributions are voluntary gifts and are not tax-deductible. If a 501(c)(3) arm is set up later, tax-deductible donations would route through that entity instead; Delta-V Academy will say so explicitly when that happens.

Recurring sustainers can cancel any time from their account menu. There is no minimum commitment, no perks gate, and no content tier behind any of this. Support is a thank-you, not a transaction for access.

Other ways to help

  • Share Delta-V Academy with a student, a teacher, a friend who is curious about space.
  • Send a screenshot of something you learned to hello@deltavacademy.com. Real feedback is the highest-leverage gift.
  • Spotted a bug? Let us know via the contact page. Bonus points for the lesson and step.