Privacy Policy
What Holt stores about you, why, and who else ever sees it.
v1 draft — this page describes the product honestly, but has not yet been reviewed by a lawyer on the owner's behalf.
In effect since October 18, 2026.
What we collect
Your email address (to sign you in and reach you about your account); your language progress and answers (which skills you know, what you got right or wrong, your calibration answers, the cards and lessons you've seen); basic usage events (when you studied, which features you opened); and, only if you use the optional voice feature, the text transcript and review of your voice scenes (see “Voice conversations”). We do not collect payment details yet — Holt has no paid tier in this early-access period.
Why we collect it
Your progress data is the whole point of Holt: it drives the adaptive engine that decides what to teach you next and grades whether you're actually holding onto it. Your email authenticates you and lets us reach you about your account. Usage events help us fix what's broken and see whether the product actually works.
Who else processes it
A short, real list — no hidden ad-tech chain: • Supabase — our database and authentication, hosted in the EU (eu-central-1 region). • Resend — sends the email sign-in links you request. • Vercel — hosts the web app you are reading right now and counts anonymised visit statistics (Vercel Web Analytics): page views, country and device type, with no cookies, no account identifiers and no cross-site tracking. • OpenRouter — routes your practice answers and skill context to language models to generate and check learning content (cards, lessons, hints). It receives what's needed to write that content, not your email or account identifiers. If you use voice, it also receives the transcript text of a finished scene to write the review. • OpenAI — runs the optional voice conversations: it receives your microphone audio in real time while a voice scene is on (details in “Voice conversations” below). Not used at all unless you start a voice scene.
Voice conversations (optional)
Voice is optional and is used only when you start a voice scene. Before your first scene we show a notice and ask you to confirm it; we record when you confirmed and which version of this policy you saw. • What goes to OpenAI: while a scene is on, your microphone audio is streamed to OpenAI in real time and its spoken reply streams back; OpenAI also turns the speech into text for the transcript. Along with that, OpenAI receives the instructions we compose for the scene: the language you study, the scenario or the topic you typed, and the names of skills and words from your learning profile so the conversation fits your level. It does not receive your email address. • What we store: we do not record or keep your audio. We keep the text transcript of the scene (your lines and the partner's), the scene's settings, the review and score, and the list of skills and words the review checked — all tied to your language profile. After a scene, the transcript text is also sent to OpenRouter (see above) to write the review. • What OpenAI keeps: OpenAI handles audio and text under its own API data terms and retention rules (see OpenAI's API data policy at openai.com/policies). We do not control them and do not promise a retention period on OpenAI's behalf. • How to stop: do not start a voice scene — then nothing is sent to OpenAI. Deleting a language profile or your whole account in Settings deletes the stored transcripts and reviews on our side. It cannot reach data already held by OpenAI or OpenRouter; to ask about that, write to the contact address below.
What we never do
No advertising, no ad trackers, no selling or renting your data to anyone, no third party gets your data beyond the processors listed above running the product itself.
How long we keep it
For as long as your account exists. Deleting a single language profile or your whole account (see Settings in the app) deletes the underlying data — it is not a soft hide.
Your rights
You can delete a single language profile or your entire account yourself, any time, from Settings inside the app. You can ask us for a copy of what we hold about you, or ask us to correct or delete something we missed, by writing to the contact address below. If you're in the EU/EEA, you also have the right to lodge a complaint with your local data protection authority.
Age
Holt is for adults — signing up requires confirming you are 18 or older.
Changes to this policy
If this changes, we'll update the effective date above. Significant changes will be announced by email.
Questions? Write to: ilia.kruchkov@gmail.com