What is watch-only tracking?
On a public blockchain, the balances attached to a public address can be viewed by anyone. Watch-only (read-only) tracking means monitoring those addresses to know their holdings, without ever being able to move the funds.
Key takeaway
What is never asked
A tracking service never needs your recovery phrase (seed), your private key, a keystore file or a signature. PortefeuilleZen refuses this information and offers no transaction, no transfer and no approval.
Attention
What a balance shows (and does not show)
A balance read on the blockchain is an observed balance: it tells how much is held, not at what price it was acquired. Cost basis and performance therefore remain unknown until you enter them. Some tokens have no reliable market price; unsolicited ("spam") tokens can also appear and are not counted in your wealth.
In PortefeuilleZen
A personal wallet groups one or more public addresses tracked on the supported networks. A data-provider outage is never shown as a zero balance: the last known value is kept and flagged as outdated. For the difference with an account on an exchange, see personal wallet or platform.