Privacy policy

This page was last updated on July 11, 2026.

The short version: Tangent is built to know as little about you as possible. There is no account, no tracking, no advertising, and no server of ours that stores anything about you. This page spells out the details.

This policy applies to the Tangent app for mobile devices and to this website, both operated by Daniel Heyne (“we”). It is effective as of July 11, 2026.

This website

tangent.wiki is a static site. It sets no cookies, runs no analytics, and loads no third-party scripts, fonts, or trackers. We do not know who visits it.

The site is served by Cloudflare Pages. Like any hosting provider, Cloudflare processes visitors’ IP addresses at the network level to deliver the site and protect it from abuse. This happens on Cloudflare’s infrastructure and is described in the Cloudflare privacy policy. We do not receive or keep visitor logs.

The app

Tangent works without an account or sign-up, and we operate no backend. You are never asked to provide personal information, and there is no server of ours that your reading behavior could be sent to.

• Wikipedia requests. The app fetches article summaries, images, and full articles directly from the Wikimedia Foundation’s servers (wikipedia.org and wikimedia.org). As with any network request, those servers see your IP address and an app identifier (the User-Agent). These requests are governed by the Wikimedia Foundation privacy policy.
• Local data. Your saved articles and app settings are stored on your device only. If the app ever personalizes your feed, those signals are computed and stored on your device as well — nothing is uploaded. Deleting the app deletes all of it.
• Crash reports. The app uses Sentry to collect crash reports and performance measurements so bugs can be found and fixed. Reports contain technical details such as device model, operating system version, app version, and stack traces. Sentry is configured not to collect personal identifiers: no names, no contact details, no session replay. Your IP address is processed transiently to deliver the report but is not stored with it. See the Sentry privacy policy.

Data retention

We run no servers, so we retain nothing about you ourselves. Crash reports and performance data are automatically deleted from Sentry after its standard retention period (currently 90 days). Saved articles and settings remain on your device until you remove them or uninstall the app.

International data transfers

Sentry may process crash reports on servers outside the European Economic Area, including in the United States. Such transfers are covered by recognized safeguards — Standard Contractual Clauses approved by the European Commission and, where applicable, adequacy decisions.

Your rights

Under the GDPR you may request access to, correction of, or deletion of personal data concerning you, and you may withdraw consent where processing is based on consent. Because we hold no personal data about you, most of these requests will have a short answer — but they are always welcome at hey@tangent.wiki, and we will act on anything that does exist (for example, a crash report that can be located and deleted).

If you are a California resident, you additionally have the right to know what personal information is collected, to request its deletion, to opt out of its sale or sharing, and to non-discrimination for exercising these rights (CCPA/CPRA). We do not sell or share personal information. To exercise these rights, contact hey@tangent.wiki.

Opting out

Uninstalling the app stops all data collection, including crash reporting. To request deletion of data that has already been transmitted (such as a crash report), contact us at the address above.

Children

Tangent is not directed at children under 16, and we do not knowingly collect personal information from them. If you are a parent or guardian and believe a child has provided us with personal information, contact us and we will delete it.

Security and breaches

We keep the amount of data that exists as small as possible — the best safeguard is having nothing to steal. Should a data breach ever affect personal data despite this, we will notify you and the competent authority in accordance with applicable law.

What we never do

We do not sell data, show ads, embed ad or social networks, fingerprint devices, send marketing communications, or build profiles of you anywhere. There is nothing to opt out of, because nothing is opted in.

Changes and contact

If this policy changes, the update will be posted on this page with a new effective date; previous versions are available on request. Where the law requires consent for a material change, we will ask for it. Questions are welcome at hey@tangent.wiki.