Short answer: No - free trials on subscriptions are not available at launch. This feature is not part of the initial release of Vizno's subscription system, so creators cannot currently attach a trial period (of any length) to a subscription tier.
What creators can do instead
While free trials are not supported, creators still have options for letting readers sample their work before committing to a subscription. You can mark individual episodes or chapters as free-to-read, allowing readers to experience your story before subscribing. This effectively acts as a hand-curated preview without requiring a formal trial mechanism.
When free trials might become available
Free trials are a known feature request and may be introduced in a future update. No timeline has been confirmed yet. When trial support does launch, it may allow creators to offer a set number of trial days on a subscription tier. Check back here for updates as the platform evolves.
What this means for readers
Readers cannot currently start a subscription and cancel within a trial window at no charge. If you subscribe to a creator's tier and later change your mind, the standard refund policy applies instead.