Made for kids
No ads, no accounts, no tracking. Math Reef sends only anonymous counts so the levels can get better.
Math Reef
Math practice that feels like a swim through the reef.
Math Reef is a math practice game for grades 1–5. Kids hold to swim up, let go to sink, and gulp down the fish carrying the right answer.
Five worlds climb from first sums to exponents in small, one-strategy steps, with stars, crowns, and a clear explanation whenever an answer is wrong.
Grades 1–5Five worldsStars + crownsWorks offline
Why parents and teachers trust it
Grown-ups stay in charge
The purchase screen and every link sit behind a question kids can’t easily solve.
Free to try
Try the first levels of every world free; one purchase unlocks everything for the family.
Who it helps
Math Reef is built for Grades 1–5 and works especially well for kids who need math facts to become quick and automatic, a few minutes at a time.
What kids learn
- Build fact fluency one strategy at a time: making 10, doubles, near doubles, and crossing 10.
- Move from single digits to two-digit carrying and borrowing.
- Learn every times table, then the division facts behind them.
- Meet exponents with squares and cubes, and what the small number means.
- Keep earlier skills fresh: rounds mix in a few questions from past levels.
How it works
Addition
From +1 and making 10 to two-digit sums with carrying.
Subtraction
Counting back, doubles, and borrowing across tens.
Multiplication
Every times table, then multiplying bigger numbers.
Division
The facts behind the tables, then dividing bigger numbers.
Exponents
Squares and cubes, and what the small number means.
Practice and challenge flow
- Short rounds: answer every question in the level, with a few review questions mixed in.
- Two stars (80%) unlock the next level; three stars and crowns reward mastery.
- Checkpoint levels let kids who already know the material test out and skip ahead.
- A wrong answer shows the worked math, so a miss turns into practice.
Where to use it
- Quick practice at home: a round takes a few minutes.
- Works offline, so it travels well.
- Each child’s progress is saved on the device they play on.
Quick answers
What age is Math Reef for?
Math Reef is for kids in grades 1 through 5. Each world starts easy and climbs in small steps, so a first grader and a fourth grader can both find their level.
What math does it cover?
Addition, subtraction, multiplication, division, and exponents: from +1 and making 10 through two-digit carrying and borrowing, every times table, dividing bigger numbers, and squares and cubes.
Is Math Reef free?
Math Reef is free to try: the first three levels of every world are free (one in Exponents). A one-time purchase unlocks every level, and Family Sharing covers the whole family. There are no ads and no subscriptions.
Does it collect information about my child?
No. There are no accounts, ads, or tracking, and it works offline. The purchase screen and all links sit behind a question only grown-ups can easily answer. Math Reef sends only anonymous counts, such as how many players pass a level.
What does it run on?
Math Reef is an iPhone app. It also runs on iPad in iPhone mode.