Privacy Policy

Effective: September 2026

This is the same policy shown inside the app, under About → Privacy Policy. It applies to the iOS app, the Android app, and this website.

Data we collect

Nuclear Toolkit sends anonymous usage events to PostHog (posthog.com) to help us understand which features are most useful. Each event includes:

• Which screen or tab you visit, and time spent
• Nuclides you open (element symbol, mass number, and primary decay mode)
• Calculator and tool interactions
• Your IP address (logged automatically by PostHog)
• Device type, operating system, and app version

What we do not collect

• Your name, email address, or any account details
• Values you type into calculators or converters
• Precise location (PostHog may infer an approximate country from your IP)
• Payment card details (Apple, Google or Stripe handle payment)

Subscriptions (iOS and Android)

Nuclear Toolkit Pro is sold through the App Store and Google Play. To show prices and to check whether this device has an active subscription, the iOS and Android apps connect to RevenueCat (revenuecat.com) each time they start. RevenueCat receives a random identifier the app generates (not linked to your name or email), this app's purchase and subscription history (product, dates, and store transaction identifiers), basic device information (platform, operating system, and app version), and your IP address. Payment itself is handled entirely by Apple or Google; neither we nor RevenueCat receive your card details.

The website has no subscription. Its optional "Support development" link opens a payment page hosted by Stripe, which handles that payment under Stripe's own privacy policy.

On your device

Saved scenarios and calculation records, including the names and notes you add to a record, are stored only on your device. They are not uploaded, and deleting the app removes them.

Purpose

Usage data is used only to prioritise features and fix usability issues. It is not sold, shared with advertisers, or used for any other purpose.

Data processors

PostHog, Inc. processes usage events on servers in the United States (posthog.com/privacy). RevenueCat, Inc. processes subscription status for the iOS and Android apps (revenuecat.com/privacy).

Opt-out

There is no in-app opt-out. To prevent event collection, block us.i.posthog.com at the network or firewall level. The app functions fully without analytics connectivity.

In a browser, any content blocker or tracker-blocking extension that blocks that host has the same effect, and every calculator continues to work — all reference data is bundled into the page, not fetched.

Accounts

Nuclear Toolkit has no accounts, no sign-in, and no login of any kind, so there is no account to delete and no credential for us to store.

Children

The app is a professional and educational reference tool. It is not directed at children, and we do not knowingly collect any data from children.

Contact

Questions about this policy? Send them through the support page — it takes under a minute and no account is needed.