LAST UPDATED 10 NOVEMBER 2026
Privacy policy
This policy explains what we collect when you visit stacktheory.app or join the Stack Theory waitlist, why we collect it, and what you can do about it. It covers this website only. The Stack Theory app will have its own privacy policy when it launches.
Who we are
Stack Theory Ltd (company number 17556779) is a company registered in England and Wales. We are the data controller for the personal data described here. If you have any questions about this policy or your data, email us at hello@stacktheory.app.
What we collect
Your email address, when you join the waitlist. That’s the only thing the form asks for, and joining is entirely optional.
Our website host, Framer, also records basic, aggregated statistics about visits to the site, such as pages viewed and the type of device used. We don’t use these to identify you, and we don’t use advertising or tracking cookies on this site.
The waitlist is intended for people aged 18 and over.
Why we use it
We use your email address only to tell you when Stack Theory launches and to send occasional updates about the app before launch. Our legal basis is your consent, which you give when you submit the form.
You can withdraw your consent at any time by replying “unsubscribe” to any of our emails or by emailing hello@stacktheory.app. We don’t use your data for profiling or automated decision-making.
Who else handles it
We use a small number of trusted providers to run the waitlist. They handle your data only on our behalf:
Framer B.V. hosts this website and processes waitlist form submissions.
Google stores waitlist sign-ups in a Google Sheet that we use to manage the list.
Apple provides our email service (iCloud Mail), so sign-up notifications and any emails you send us are held in our inbox.
Some of this processing may take place outside the UK. Where it does, our providers use recognised safeguards, such as UK adequacy regulations or the UK International Data Transfer Addendum.
We don’t sell your data, and we don’t share it with advertisers. We would only disclose it if the law requires us to, or to a new owner if Stack Theory Ltd were sold or merged, in which case it would remain protected by this policy.
How long we keep it
We keep your email address until Stack Theory launches and for up to 6 months afterwards, unless you ask us to delete it sooner. After that, we delete it from our inbox and the waitlist sheet.
Keeping it safe
We limit access to waitlist data to the people who run Stack Theory, and we use secure, reputable providers to store it. No online service can be completely secure, but we take reasonable steps to protect your data. If a breach ever puts your data at risk, we’ll tell you and the ICO where the law requires it.
Your rights
Under UK data protection law, you can ask us to give you a copy of your data, correct it, delete it, restrict how we use it, or send it to you in a portable format. You can also withdraw your consent or object to how we use your data. Email hello@stacktheory.app. It’s free, and we’ll respond within one month.
If you’re unhappy with how we’ve handled your data, please contact us first so we can try to put it right. You can also complain to the Information Commissioner’s Office at ico.org.uk.
Changes to this policy
If we change this policy, we’ll update the date at the top of this page. If the changes are significant, we’ll let waitlist members know by email.