GNU Health is described as 'The GNU Health project provides the tools for individuals, health professionals, institutions and governments to proactively assess and improve the underlying determinants of health, from the socioeconomic agents to the molecular basis of disease' and is an app. There are more than 25 alternatives to GNU Health for a variety of platforms, including Web-based, Windows, iPhone, Mac and iPad apps. The best GNU Health alternative is SimplePractice. It's not free, so if you're looking for a free alternative, you could try Carepatron or OpenEMR. Other great apps like GNU Health are Lightning Step Technologies, OpenMRS, ClinCapture and drchrono.