Free, forever

• Every practice tool and game, including offline play
• A free parent account
• Cloud backup and sync for up to 2 students
• Export and delete your data any time

Problemizer Plus: $1.99/month

Everything in Free, plus:

• Cloud backup and sync for unlimited students
• Bulk printable certificates

$1.99/month, renews automatically until you cancel. Cancel anytime in Settings → Manage subscription. See our Terms.