If you're looking for a calculator with a big number pad and a large result display, the Big Number Calculator by DSW Dev might be the perfect fit for you. This calculator is designed for those who have difficulty seeing and selecting numbers with other calculators, and who generally perform only basic calculations.

The app has a straightforward interface, with a big number pad that is easy to use, even for those with larger fingers. The result display is also large and easy to read. You can perform basic calculations like addition, subtraction, multiplication, division, and percentage with ease.

Overall, the Big Number Calculator is a simple and effective tool for those who need a calculator with a larger display and bigger buttons. While it may not have advanced features, it gets the job done for basic calculations. Plus, it's free to use on Android.