Number Diver is a numbers and number-patterns game for primary school, grades 1 to 6. Number bubbles float in the water and the child pops the right one. In grade 1 the target is written in Persian digits and the child finds the same number among bubbles in Latin digits; from grade 2 a number sequence appears with one gap and the child finds the missing number.

• 161 levels across six grades, each following that grade's math book

• Grade 1: Persian and Latin digits, one- and two-digit numbers to 99

• Grade 2: counting in tens, fives, twos and threes, forwards and backwards

• Grade 3: three- and four-digit patterns and times-table multiples

• Grade 4: patterns with large numbers and multiples of 11, 12, 15, 25 and 50

• Grade 5: millions and decimal patterns in tenths and hundredths

• Grade 6: decimal patterns from any number and mental steps like 99 and 101

• The child picks their own grade at the start

• A Persian narrator reads every instruction aloud

• Mistakes are never punished; the child is encouraged and carries on

• Works offline after install

About the first 40% of each grade is free forever, 66 of 161 levels. The free version shows child-appropriate ads: only between levels on the result screen, and banners outside gameplay. The full game is a one-time purchase of 99,000 Toman, no subscription; it removes all ads and counts toward Nikipoo School later. It is one of the 44 games in Nikipoo School.