Frequently Asked Questions

Free ($0): 3 AI Credits/day (refills every 24h), Scene Explainer, Video Flashcards. Plus ($6.99/mo or $4.89/mo annually): 300 AI Credits/month, Voice AI Roleplay, Boss Battles, Smart Condensed Mode, powered by SubLearn Core AI. Pro ($12.99/mo or $8.99/mo annually): 1,500 AI Credits/month, 50 Advanced Deep-Reasoning AI prompts, Priority GPU Processing, Unlimited Basic Practice (fair use). See Pricing page for full comparison.

Open the billing page and choose the plan you want. If you already have a paid subscription, use Manage Billing to open the secure billing portal for plan changes and renewal details. New upgrades start through checkout and activate as soon as payment succeeds.

Yes. Open Manage Billing from the billing page to change plans or cancel renewal. Changes are handled in the secure billing portal, and your current paid access stays active until the end of the billed period unless the provider says otherwise.

If you have a billing problem or want to discuss a refund, contact [email protected]. Subscription management itself lives in Manage Billing, where you can review the active plan and prevent future renewals by cancelling in time.

We accept major payment methods supported by our checkout provider, including cards and wallet options when available. Payment details stay with the secure billing provider rather than being stored directly on our application servers. For questions about charges or payment methods, contact [email protected].

Yes! Annual plans save you 30%. Plus Annual: $58.68/year ($4.89/mo vs. $6.99/mo). Pro Annual: $107.88/year ($8.99/mo vs. $12.99/mo). Annual subscribers are billed once per year and can cancel anytime with a 14-day money-back guarantee.

New users can try Plus free for 14 days with full access to all Plus features — Voice AI Roleplay, Smart Condensed Mode, Boss Battles, and 300 AI Credits. No credit card required. If you love it, your subscription continues. If not, cancel before the trial ends and you won't be charged. Trial is available once per account.

AI Credits power AI features such as scene explanations, roleplay conversations, and condensed summaries. Free: 3 credits per day. Plus: 300 per month. Pro: 1,500 per month. Current usage is surfaced in the product where those features run and in your current plan summary.

Plus subscribers can buy AI Credit Packs: 50 Credits for $1.99 or 150 Credits for $3.99. Purchased credits expire in 30 days and are used after your monthly quota runs out. Buy from Billing → Credit Packs. Pro subscribers have generous monthly allowances and rarely need packs.

Invoices are emailed after each successful payment. If you need billing documents again or need help locating them, open Manage Billing or contact [email protected] for support.