Auto top-up keeps Zac working without interruption. When your total credit balance drops below a threshold you set, Zealder automatically buys the credit pack you've chosen and charges the card on file — no action needed from you.

To set it up, go to Account → Zac AI Credits and turn on auto top-up. You choose two things:

• Threshold — the balance at which a top-up should trigger (for example, "refill when I drop below 1,000 credits").
• Pack — which pack to buy automatically: the $10, $25, or $100 pack.

You can change the threshold or pack, or turn auto top-up off, at any time — just update the setting, or ask Zac to "turn on auto top-up and buy the $25 pack when I drop below 1,000 credits." Because it's a billing change, Zac will confirm the details with you before saving.

Auto top-up charges happen automatically in the background (off-session), so make sure the card on file is current.