Privacy

When you sign up, we store your email address. That's it for identifiers. We use it to send the magic-link sign-in and to email your lesson permalinks when renders finish.

Lesson prompts (the math problem you typed or photographed) and the generated specs are stored so we can render the lesson and let you watch it back. They're tied to your account.

Billing is handled by Stripe. We never see or store your card number; we keep a Stripe customer ID and a record of which lessons you paid for.

Nothing directly. There's no child account. Lessons live at private permalinks the parent or teacher shares. The child watches them in a browser, like any other video. No login, no profile, no tracking pixels, no analytics on the watch page.

This is a deliberate choice for COPPA compliance. The product is designed so we never need to know who watched, only that a lesson was requested.

The voice clone feature is opt-in and Family-plan only. If you turn it on, you record about 20 seconds reading a short sentence. That recording is sent to our voice provider (ElevenLabs) to create a voice model. The model — not the original recording — is what narrates your lessons.

You can delete your voice clone from your account at any time. When you do, we instruct ElevenLabs to remove the model and we wipe the original recording from our storage within 24 hours.

We never use your voice clone to narrate someone else's lesson, and we never share it with anyone outside the voice provider needed to run it.

• Stripe — payment processing
• ElevenLabs — voice synthesis (and voice cloning if you opt in)
• Anthropic (Claude API) — generating the lesson plan from your prompt
• Cloudflare R2 — storing rendered MP4s
• Resend — sending you transactional email (sign-in links, lesson-ready notifications)

Each is bound by their own privacy terms. We don't share your data with marketing or ad networks.

• Sell your email or any data to anyone
• Run ads or behavioral tracking
• Profile your child or build a learner record
• Use your prompts to train models (other than ours, for quality)
• Share lesson content publicly without your action

You can export every lesson you've generated, delete your account entirely (which wipes your lessons, ledger, and voice data), or unsubscribe from marketing-style email (transactional sign-in and lesson-ready emails remain — they're how the product works).

To do any of these, email hello@infinitesum.app. Self-serve controls land before public launch.

If we make a meaningful change, we'll email account holders before it takes effect. The date at the top reflects the last edit.