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MencalHD(Mencal for iPad) is coming.
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New Features:
•New Design.
•With mencalHD you can enter the answer by yourself (not just four choices).

All of us can do simple addition and subtraction of one or two digit numbers without a calculator; Mencal is here to kick that ability into overdrive.
Mencal provides you with lessons and simple tricks to allow you to: work with three digit numbers; fractions of different styles regardless if you are adding them or subtracting them; and finding sums with multiplication and division. Mencal will train you to do all of it. Then the app will test you on your grasp and knowledge of the methods you've learned.

• Two-digit number like ab+ba
• Three-digit number like abc+cba
• Two fractions like 1/a+1/b
• Two fractions like (a-1)/a + (b-1)/b
• Sum of first n odd numbers
• Sum of first n even numbers

• Two-digit number like ab-ba
• Three-digit number like abc-cba
• m-n if m+n=100,1000,10000...
• Two fractions like 1/a-1/b
• Two fractions like c/a-c/b
• Two fractions like (a-1)/a-(b-1)/b

• Same ten's digit, 1's sum is 10
• Same ten's digit, 1's sum isn`t 10
• Same 1's digit, ten's digits sum is 10
• Same 1's digit, ten's digits sum isn`t 10
• two-digit number ab×cc (a+b=10)
• ab×ccc.....c (a+b=10)
• Multiply by 11
• 2-digit number if 1's digit is 1
• 2-digit number if tens place digit is 1
• 2-digit number ×2-digit number(universal)

• Divide any number by 5
• Divide any number by 25
• Divide any number by 125
• Divide any 3-figure number by 9

• Square numbers made up of 1's
• Square numbers made up of 3's
• Square numbers in the 90's
• Square numbers ten`s digit is 0
• Square a number ending in 25
• Square numbers made up of 6's
• Square numbers made up of 9's
• Square a number ending in 1
• Square a number ending in 5
• Square a number ending in 9
• Square numbers in the 10's
• Square numbers in the 40's
• Square numbers in the 50's