How to play

A Session is a short, timed mix of mental math questions. On Play, choose how many minutes you have, then answer the first question whenever you are ready to start the clock.

• SumNinja starts new players with approachable addition and subtraction, then gradually introduces harder questions as their answers show they are ready.
• A short Session counts toward your practice rhythm and streak, so a few focused minutes still move your progress forward.
• Multiplication and division appear later during guided play, but you can choose those skills yourself at any time.

You can let a Session choose a balanced mix for you, or open Play and select a particular addition, subtraction, multiplication, or division skill yourself.

• Use Speed when you want quick reactions, or Accuracy when you want to continue until you make a mistake.
• Choose Tap to answer with four colored choices, or Type to enter the number yourself. You can switch during play or change the preference later in Settings.
• Saved Settings remember a question mix you use often. Your choices belong to the current Player and are stored separately on each device.

Progress turns your completed play into a clear picture of your practice. It helps you notice improvement, keep a routine going, and decide what would be useful to practice next.

• Overview brings together recent activity, your practice rhythm, achievements, and suggested skills.
• Performance shows changes in speed and accuracy. History lets you look back at the questions and answers from earlier play.
• The colored skill map shows which questions are already part of your guided play and which ones you are working toward. Every skill remains available to choose yourself.

Add a Player for each person who uses SumNinja. Children, adults, friends, and family members can share one device without mixing their practice or results.

• Open the player menu to add someone new or switch between Players. Each Player keeps their own level, Settings, answer method, history, and achievements.
• SumNinja works without an account and stores Player data on the device, so you can continue practicing while offline.
• Use Import and export to make a backup or move a Player to another device. SumNinja shows what will change before you confirm an import.