Privacy Policy
Last updated: 16 October 2026
DataLens is a site for learning programming. This page explains what we collect when you use it, and what we do with it. The short version: we collect as little as we can, and we don't sell or share it for advertising.
What we collect
- Your Google name and email address. When you choose "Continue with Google", Google tells us your name and email. We never see your Google password.
- Your learning progress. Which modules you've finished, your answers and your streak, saved to your account so it follows you between devices.
- Your plan and payment status. Whether your account is Free or Pro, and a record of Pro payments (amount, date, order ID). Payments are handled by Midtrans. We never see or store your card or bank details.
Without an account, progress stays only in your own browser.
How we use it
Only to run the site: to sign you in, save your progress, unlock Pro lessons after you pay, and answer support requests. We don't use it for advertising and we don't sell it.
Who handles it
- Supabase stores accounts and progress.
- Google handles sign-in.
- Midtrans processes payments.
- Cloudflare hosts the site.
These services only receive what they need to do their job.
Deleting your data
You can delete your account yourself from Settings on the site. That permanently removes your login, profile and saved progress. Payment records are kept without your name attached, because we may need them for bookkeeping and refunds.
You can also email us and we'll delete it for you.
Contact
Questions or requests: [email protected]
Changes
If this policy changes, we'll update the date at the top of this page.
See also our Terms & Conditions.