The Venn Master helps graphically solve counting problems involving two or three sets by constructing a Venn diagram for you. Enter all of the known information and the Venn Master will calculate the diagram. If the information is inconsistent, the Venn Master will indicate the problem is not solvable.

Once a problem is solved, select regions of the diagram to have the Venn Master compute the total selected size. It will also display a mathematical description of the selected set.

• Creates Venn diagrams for you
• Displays set notation for selections
• Enter your own problems
• Use to check your work
• Custom keyboard for easy data entry
• Save Venn diagrams as pictures
• Mail your work to others
• Solve 2 or 3 set problems

If available, be sure to enter the size of the Universal set and/or the size of the region outside of A, B, and C. These sizes are often known, but often overlooked. Sometimes problems will not directly state that the size of the region outside of A, B, and C is zero. If this is the case, be sure to enter the zero size into Venn Master, otherwise it will not be able to solve the problem. You need at least 8 known sizes to solve a three set problem, and at least 4 known sizes to solve a two set problem.

If the Venn Master has been helpful to you, please leave a review. If you have a suggestion, please contact us at Many thanks!

Ratings and Reviews



Doesn't let you type in a set. Furious. Do not waste your money.

Dreadful app

Horseradish 4

Don't waste your money. Terrible app


Mertz Werkz LLP
1 MB
Requires iOS 4.0 or later. Compatible with iPhone, iPad, and iPod touch.
Age Rating
Rated 4+
© 2012 Mertz Werkz LLP


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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