Ironwood, the migration to it, a better note selection and a sturdier Cloud Vault.

Released 20 July 2026.

Ironwood

Ironwood is the next version of the Orchard pool, activated by NU6.3. Zkool synchronizes it, shows it as a fourth balance (transparent, Sapling, Orchard, Ironwood, in that order) and, once the upgrade is active, receives and spends from Ironwood while Orchard becomes spend-only. An Ironwood address is the same as an Orchard address. See the Addresses guide.

Orchard to Ironwood migration

A migration page moves an account's Orchard funds to Ironwood in two phases: the notes are first split into standard denominations, then migrated one by one. A speed slider, from Very Fast to Slow, sets the delay between steps; a slower migration is harder to correlate. The page shows the phase, the progress and a countdown to the next step.

Note selection

The note selection is a branch and bound search that minimizes the ZIP 317 fee. The send page has a mode toggle: Fee picks the cheapest notes, Privacy picks the notes that reveal the least. The choice is remembered.

Cloud Vault

Recovery from the Cloud Vault is more robust: a passkey can stand in for the password, registering one is offered after a password recovery, the Google account picker is shown every time the vault is enabled, and a spinner shows while the vault works. Passkeys are not available on iOS. See the Cloud Vault section.

Also

• Account backups exported by an older version can be imported.
• With "recipient pays fee", the fee is deducted from the recipient.
• The password field of the database dialog can be cleared on every platform.
• The app shows a spinner while it loads rather than an empty screen.
• GraphQL: the Addresses type has an ironwood field.