From body mass index to renal failure index, healthcare professionals rely on several medical formulas to diagnose and treat their patients. Luckily, Pascal Pfiffner and Mathias Tschopp, two medical doctors with a passion for creating affordable medical applications, have created an iOS application that houses more than 200 medical formulas in a simple package. Applied experience app The MedCalc medical calculator has been available on mobile platforms from more than a decade. Remember the Palm Pilot? The developers have used their experience to deliver a simple and efficient system for finding the right formula, and getting a quick, and most importantly, accurate output value. “We understand that providing a correct result is a big responsibility for a medical app,” Pfiffner says. “MedCalc will check before computing a result that the input variables actually make sense. To illustrate this, it won’t be possible to calculate a BMI for a patient if the patient’s height is set to 150 m (meters). So MedCalc blocks the result and displays a popup saying: this value doesn’t make sense, check the units… So the user has a chance to make it 150 cm (centimeters) and get a result that will actually be meaningful.” Users start by either selecting a formula from an alphabetical list or using the search function. Users can also favorite the formulas they use often to access them even quicker. Once a formula is selected, the user can read about its units, uses, references, and description. But the app shines when entering values into the formula. MedCalc uses custom overlaid controls that allow the user to select from a list of values. Users can also enter their own values in each field using a number pad. If users are using multiple formulas for the same patient, MedCalc will remember values already used and make them available with a tap of the history icon. Unit types are also available on the number pad, which makes switching units a cinch. Priced to move One of the best features of the application is the price. The MedCalc version is only $1.99, and the Pro version is $4.99. With the MedCalc Pro, users get additional features including native iPad support. “MedCalc really looks great on the big screen,” Tschopp says. MedCalc Pro also allows users to create patient profiles and store them in the application’s patient database along with recent formula results. Users can add notes to formula results and share them with colleagues via email. The application also has AirPrint support that allows users to wirelessly send results to networked printers. What’s next Pfiffner and Tschopp say that they are continuing to add new formulas and provide better interpretation hints for current formulas. They also plan to integrate the application with the iCloud to support favorites, dilutions, and notes. As for the current version, the developers have heard positive feedback from satisfied medical students, paramedics, nurses, nurse practitioners, physicians, and specialists. Reviews in the App Store confirm that the application is a hit, and with more medical formulas being added, the MedCalc app has something for every medical professional.