A patient tutor, from $8 an hour.

No. You buy a pack of hours once, and your child uses them whenever they need. Hours don't expire.

A session uses hours in 5 minute steps, rounded down, and never more than 30 minutes. A 17 minute session uses 15 minutes. A session under 5 minutes is free.

Email hello@revyze.fr and we'll refund the pack in full, as long as your child has used no more than half of its hours.

Live 30 minute sessions with Sophie, the study tools in the Sophie app, and the parent dashboard. A child's first pack also comes with a free phone tripod, shipped to a US address.

AP Calculus AB and BC, for high schoolers.

A laptop and an iPhone or iPad. The phone sits above the desk as Sophie's camera, so your child works on paper as usual.