Calculate Percentage PRO is an iPhone application developed by Glindemann Sennoun Langer GbR. It is a free program under the category of Education & Reference. This powerful tool simplifies percentage calculations by allowing users to enter only 2 out of 3 variables.

With Calculate Percentage PRO, users can perform calculations using the rule of proportion. The app also includes a history function that saves input, making it easy to refer back to previous calculations. The detailed solution is provided, ensuring accuracy and transparency.

One of the standout features of Calculate Percentage PRO is its support for entering fractions and decimals. Users can also input constants for more complex calculations. Additionally, the app is completely ad-free, providing a seamless user experience.

The user interface of Calculate Percentage PRO is intuitive and user-friendly. It features 3 fields for entering values, which are highlighted if incorrect or missing. Users can easily switch between the solution, input view, and history by swiping or using the provided buttons. The history entries can be deleted or manually sorted, and selecting an entry automatically loads it for calculation. The entire history can be cleared with a single press of a key.

Calculate Percentage PRO is a must-have tool for anyone needing to perform percentage calculations. Its user-friendly interface, extensive features, and accurate calculations make it an invaluable resource for students, professionals, and anyone else dealing with percentages.