Cat Calculator is a charming and entertaining calculator app available on the iPhone. Developed by Kenji Kiuchi, this app adds a delightful twist to the mundane task of calculations by featuring cute cats that shake their heads in response to your touch.

The main functionality of Cat Calculator is its ability to perform calculations from the top, with the option to enable or disable the priority of multiplication and division. With the priority setting turned off, for example, the app will calculate 1 + 2 x 3 as 9. However, when the priority setting is turned on, the same calculation will be evaluated as 7. This flexibility allows users to choose their preferred calculation method.

Another noteworthy feature of Cat Calculator is its history function. Every calculation performed is saved in the history, making it easy to refer back to previous calculations. The history function also follows the same calculation method as the main calculation screen, ensuring consistency and accuracy.

Adding to the charm of Cat Calculator is the cup cat sound feature. Each digit from 0 to 9 is represented by a different cat sound, adding a playful element to the app. For example, the digit 0 is represented by the sound "C," while the digit 5 is represented by the sound "B." This unique feature adds an extra touch of fun to the overall experience.

Overall, Cat Calculator is a delightful and functional app that brings a touch of cuteness to your calculations. Whether you're a cat lover or simply looking for a fun way to perform calculations, this app is sure to bring a smile to your face.