SellerFermion Inc. (株式会社Fermion) Responsible personRepresentative Director Takumi Kogawa Business address8F MIEUX Shibuya Building, 5-3 Maruyamacho, Shibuya-ku, Tokyo 150-0044, Japan Phone numberDisclosed without delay upon request. PriceFree ($0) / Basic ($12 per month) / Pro ($25 per month). The final amount and currency are shown on the pricing page and Stripe Checkout. Other feesInternet connection and communication charges are the customer’s responsibility. Payment methodsCredit card and other payment methods supported by Stripe Payment timingSubscription fees are charged at the start of each billing period and automatically renew until cancellation. Service deliveryDigital service. The desktop app's local features are available after installation without purchase. Online account features require sign-in; Basic and Pro Axiom AI entitlements are enabled after Stripe confirms payment. CancellationYou can cancel anytime from the billing management screen (Stripe Billing Portal). Access continues until the end of the current billing period. Refund policyIn principle, we do not provide refunds or prorated credits, except where required by applicable law. If you believe you were charged in error, contact support with your invoice or billing ID. RequirementsDesktop app: macOS 12+ (Apple Silicon / Intel) or Windows 10/11 (x64). Building requires a TeX distribution; an existing installation can be used, or managed TeX Live can be downloaded and installed with your approval. Axiom AI, account, billing, and managed-install functions require an internet connection; math OCR works locally and offline. Microsoft Store manages updates for the Windows Store version.