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Privacy Policy

Last updated: July 20, 2026

What is q2Kindle

q2Kindle lets you save articles from the web, bundle them into an ebook (EPUB format), and deliver them to your Amazon Kindle device via email. It is available as a web app at q2kindle.com and as an iOS app; this policy covers both. We are committed to protecting your privacy and being transparent about how we handle your data.

Information We Collect

We collect the minimum data needed to provide the service:

  • Email address — used for account authentication via passwordless magic links. This is the only personal information required to create an account.
  • Kindle email address — the Amazon Kindle email you provide in your settings so we can deliver ebooks to your device.
  • Article URLs and content — when you add an article, we fetch and extract the readable content (title, author, text) for EPUB generation. This content is stored temporarily while the article is in your queue.
  • Send history & favorites — a log of when deliveries were made, including article count and delivery status, and any articles you mark as favorites, so you can review and revisit past sends in your Library.
  • Delivery preferences — your chosen schedule, timezone, and EPUB formatting options.
  • Usage analytics— on the q2Kindle website we collect basic product-analytics events (such as pages viewed and actions taken, like saving an article or changing a setting) to understand how the product is used and improve it. This is processed by PostHog (see Third-Party Services). We do not use this data for advertising or to track you across other companies' apps or websites.

How We Use Your Information

Your data is used solely to provide the q2Kindle service:

  • Authentication — your email address is used to send magic link sign-in emails. We never store passwords.
  • Article extraction — we fetch article URLs you provide to extract readable content for your ebook.
  • EPUB generation — extracted articles are bundled into an EPUB ebook formatted for Kindle reading.
  • Email delivery — the EPUB is sent as an email attachment to your Kindle email address. These delivery emails go only to your own Kindle device.

Kindle Delivery Emails

The emails that carry your articles to your Kindle follow strict practices:

  • Delivery emails are sent only to your own Kindle email address that you explicitly provide.
  • You must manually add our sender address (kindle@q2kindle.com) to your Amazon approved senders list before delivery can work.
  • Each delivery email contains a single EPUB attachment — your bundled articles.
  • Users are limited to 10 deliveries per day to prevent abuse.

Account & Product Emails

Separately from Kindle delivery, we send a small number of emails to your account email address (not your Kindle):

  • Sign-in emails — the passwordless magic link / verification code you request to log in.
  • Product & onboarding emails — occasional messages such as a welcome email or product updates. Every one of these includes an unsubscribe link, and unsubscribing stops them without affecting your Kindle deliveries.

We do not sell or rent your email address, and we do not send you third parties' advertising.

Third-Party Services

We use the following trusted third-party services to operate q2Kindle:

  • Supabase — authentication and database hosting (stores your account, articles, and settings).
  • Amazon Web Services (SES) — email delivery for EPUBs sent to your Kindle, sign-in emails, and product emails.
  • PostHog — product analytics on the q2Kindle website (pages viewed and actions taken). Not used in the iOS app.
  • Netlify — web application hosting.

We do not sell, share, or provide your personal data to any third party for advertising or marketing purposes.

Data Storage & Retention

  • All data is stored securely in a Supabase-hosted PostgreSQL database with row-level security (RLS) policies — each user can only access their own data.
  • Article content is stored while in your queue and marked as sent after delivery. You can delete articles from your queue at any time.
  • Send history is retained so you can review past deliveries.
  • You can permanently delete your account at any time from Settings on the web or in the iOS app. Deletion is immediate and irreversible — it removes your account email, Kindle email, queued articles, send history, feed subscriptions, and email engagement records from our database. If you'd rather we do it for you, email support@q2kindle.com.
  • After deletion, residual copies may persist briefly in encrypted database backups before they expire on our provider's normal rotation, and an email address that previously bounced or marked us as spam may remain on our email provider's suppression list so we don't contact it again.

Security

  • Passwordless authentication — we use magic links sent to your email. No passwords are ever stored or transmitted.
  • HTTPS everywhere — all connections to q2kindle.com are encrypted via TLS/SSL.
  • No sensitive credentials stored — we do not store any email passwords, API keys, or financial information from users.
  • Row-level security — database access is scoped per user via Supabase RLS policies.

Contact

If you have questions about this privacy policy or how your data is handled, email us at support@q2kindle.com.