Apollo blastsimulator [1] is a commercial CFD-tool (Computational Fluid Dynamics) developed by Fraunhofer EMI, specially designed for simulation of blast wave propagation in free-field and confined space scenarios. The purpose of this work is to investigate the tool regarding usability, efficiency and accuracy in simulations of blast wave propagation in free-field scenarios. The evaluation of the software has mainly been done through comparison with experimental results, in some cases also with results calculated with empirical models and simulations performed with other software's. The work has also included examination of the convergence and simulation time related to the level of resolution. The Apollo software has proven to give reasonable results for the most cases studied, but the greater the complexity of the problem is the greater the deviation of the results compared to experimental results becomes.