Spry Simulation is described as 'Microsoft Excel add-in which enables system dynamics, discrete-event and Monte Carlo simulation in modern spreadsheets, especially with small to medium-sized simulation models and for a proof-of-concept tasks' and is an app. There are eight alternatives to Spry Simulation for Windows, Microsoft Excel, Mac, Linux and Web-based. The best Spry Simulation alternative is Anylogic. It's not free, so if you're looking for a free alternative, you could try GoldSim. Other great apps like Spry Simulation are RiskAMP, MC FLO, ModelRisk and @RISK.