This wonderful app calculates sample size of patients for any desired confident levels and margin of errors.
This calculator app is designed integrating Z values (Z), population proportion containing the attribute of interest usually extracted from PubMed literature (p) and desired margin of error (e) based on the Cochrane formula 1963 designed for infinite population.

The app layout design consists of three user input boxes for entering values. User is instructed to enter desired Z values depending on desired confident levels in the first input box. The population proportion should be entered in decimals referring a recently published literature in the PubMed in the second input box. The third box consists of entering desired margin of error (0.05, 0.01 and 0.001).

The sample size value is viewed in the text view box in the fourth box on clicking the 'Click here' button. This is a user friendly app enabling research scholars to quickly calculate their required sample size of patients accurately.