Yes. You can upgrade or downgrade at any time from the billing page in your account settings. Changes take effect at the start of your next billing cycle.
You can still log meals manually (text input) and access all your previous logs. Scans reset every day at midnight. Upgrade to Plus for unlimited scans.
Never. All payments are handled by Stripe. Fivi never sees or stores your card details.
The Free tier is the best way to try Fivi risk-free. Plus and Pro have no trial period but you can cancel before your next billing date for a full period of access.