Nothing. Nighthawk Tube has no analytics, no telemetry, no crash reporters, no advertising SDKs, no accounts, and no server. Every tone is synthesised on your device as you listen, and the app makes no network calls of its own. Your sessions are not recorded anywhere — not even on your device.
— Nighthawk Tube · Android · Legal —
PRIVACY POLICY
Effective 2026-08-04.
Nighthawk Tube is published by river.io LLC. It is a stereo oscillator meditation instrument that draws what it sounds like. The summary is short because the data flows are short — we do not collect any information about you.
This page covers the Android app on Google Play. The iOS version has a separate policy, because it offers an optional Apple Health integration that the Android app does not have.
— 01 · What the app collects —
— 02 · Permissions —
Our own manifest declares exactly one permission: com.android.vending.BILLING, used only to offer the one-time purchase that unlocks the full session timer. The Google Play Billing library we depend on merges in INTERNET and ACCESS_NETWORK_STATE, so those appear in the installed app too; they exist solely so Play Billing can reach Google's servers, and nothing else in Nighthawk Tube uses them. The app requests no microphone, camera, location, storage, or contacts permission.
— 03 · What lives on your device —
Your knob positions and whether you own the full version. Nothing you entered, because the app asks you to enter nothing. Uninstalling the app removes it; your purchase stays attached to your Google account and restores when you reinstall.
— 04 · Purchases and Google Play —
The optional one-time purchase is processed entirely by Google Play Billing — we never see your payment details, only whether an unlock is owned. Nighthawk Tube is distributed through Google Play, which may provide us aggregate download and revenue statistics that do not identify you. Refer to Google's privacy policy for Google's part, and to Google Play for payment and refund terms.
— 05 · This website —
This site (river.io) is a static page hosted on GitHub Pages. We run no analytics here. GitHub may keep standard web-server access logs for security purposes; see GitHub's privacy statement. The page loads webfonts from Google Fonts; consult Google's privacy policy for that connection.
— 06 · Children —
Nighthawk Tube collects no data from anyone, children included.
— 07 · Your rights —
Because we do not collect or store data about you, requests to access, correct, delete, or port personal data (GDPR, CCPA, and equivalents) do not produce a record from us — there is nothing to produce.
— 08 · Changes and contact —
If a future version changes how the app handles data, we will update this page and its effective date. Privacy questions: privacy@river.io.