What 'custom' actually means here
Some wheel-maker tools mean 'custom' as in picking from a gallery of pre-built templates. Spinzelvo means it more literally: whatever you type becomes the wheel. There's no separate 'design' step — the moment you add or remove an entry, the wheel redraws itself, resizing labels and reassigning colors from a consistent, high-contrast palette automatically.
That makes it fast to build a one-off wheel for a specific need (a raffle, a class list, a prize set) without spending time on layout or color choices, while still ending up with a wheel that's legible and visually consistent.