The app includes a lot of mathematics topics such as geometry, algebra, trigonometry, quadratic function, linear function, linear system, circle equation, math sequences, probability, vectors. Features include: - Step-by-step solution & explanation. - Solve handwritten problems. - Graphs equations. - Advanced scientific calculator Premium Subscription • Payment will be charged to iTunes Account at confirmation of purchase • Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the period. • Length of subscriptions : Weekly. • Account will be charged for renewal within 24-hours prior to the end of the current period, and identify the cost of the renewal. • Price of subscriptions: Weekly 3.99 USD & Yearly 19.99 USD • Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase. • No cancellation of the current subscription is allowed during active subscription period. • Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription. For further information: Privacy Policy: https://www.personalsecurityapps.com/privacy-policy Terms of Service : https://www.personalsecurityapps.com/terms-of-service