Chemistry Calculator -iOS Application

What I am looking for is a lab calculator app which will house ~10 common calculations used in chemistry and biology labs. I am looking for a simple and clean design with straightforward UI. Examples: Dilution Calculation- Formula will be C1*V1= C2*V2, where C1 and 2 are initial concentration and volume and V1 and 2 are final concentration and volume. User will input the three variables and we will calculate the missing part. Molarity Calculator- Similarly use will input three known values and we will calculate the 4th piece. Only difference here will be a select compound link, which will enable the user to add their favorite compound and store it for future use. Link to screenshots from similar apps for your reference: [login to view URL] Here are the calculations( with formula) we would like to add: [login to view URL] From the list, the calculations we are interested in are: DNA Conversions( 1,2, 5,7) Protein Conversions(1,2) Other Calculations(1,2,3) As for other app features- Simple Timer- One of the buttons would link to a Timer We would like to put couple of the calculations/features under an in-app purchase. Implement Facebook SDK Optional- Google mobile ads mediation SDK with Facebook Ads PS- Open to native iOS only development or cross platform development to include Android.​ App design and development and deliver completed project.​ Simple and clean design skills Well commented code Good communication skills