MoonCold App Privacy Policy

Current app functions

The app communicates with a supported physical card through Android NFC. It verifies the card identity, opens a protected session, verifies the card PIN, requests card-held BIP-32 key creation or public-key derivation, displays the derived Ethereum public address and verifies a random local secp256k1 signing challenge. It also checks selected public-address formats and detects ISO-DEP NFC cards. It does not fetch balances, construct transactions or broadcast cryptocurrency transfers.

Information processed on the device

The app processes NFC responses, card identity certificate data, applet version, remaining PIN attempts, public keys, a derived public Ethereum address, random local signing challenges and any public address entered in the format checker. The PIN is used transiently to send an encrypted command through the protected card session. The app does not store or transmit the PIN. Private wallet keys are created and used inside the physical card and are not exported to the app.

No in-app collection or sharing

The app does not create an account and has no Internet permission, analytics SDK or advertising SDK. It does not send card information, public addresses, PINs, keys, challenges or signatures to The Moon, LLC, an analytics provider or a blockchain service. Current wallet and address checks run locally between the phone and card.

External links and support

If you choose a website or privacy link, Android opens it in a separate browser. If you choose the support link, Android opens your email app. Those external apps and their providers handle data under their own terms. If you contact us, we receive the email address and information you choose to include. Never send a private key, recovery phrase, PIN or other secret.

Retention and deletion

The app does not create a MoonCold server-side wallet record. Session data is held in memory while the card operation is active. You can clear local app data or uninstall the app. Support correspondence sent outside the app may be retained as needed to respond and meet legal obligations; request deletion of eligible support data at support@mooncoldwallet.com.

Changes

If a future version adds network access, balances, transactions, analytics or another data practice, this policy and the Google Play Data safety declaration will be updated before that version is released.

Operator and contact

The Moon, LLC
9505 Reisterstown Rd Ste 3S
Owings Mills, Maryland 21117-4469
United States

Privacy and support: support@mooncoldwallet.com