The need of an approach for the definition of a platform-independent medical digital library, using only 2 open-source tools, will be described. To test the need and the success of such an approach, a library will 3 be created, which can later be used in a larger scale as a general purpose digital medical tool, when comes 4 the need to evaluate an image. 5 As a first test, the library will be used in the development of a tool aimed to aid doctors in otoplasty 6 candidates' evaluation. This tool shall be developed and tested first on a mobile platform, so the potential 7 of the developed library can be tested on the most adverse situation. Also, the resulting library will be 8 license free, making easier the collaboration of others in development and integration with other software, 9 translating in a better spread of the library in medical practice. 10 CCS Concepts 11 • Medical imaging, mobile devices, digital medical tool. 12 Keywords 13 Medical imaging, open-source, image analysis software library, digital medical tool