Feature comparison

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OpenRocket RockSim
License Open Source (GPLv3) Proprietary
Price Free $120
Supported platforms Windows, Mac, Linux Windows, Mac
Supported file formats ORK, RKT RKT

UI features

OpenRocket RockSim
Side/back view Yes Yes
3D view No Yes
Design view rotation Yes ?
Live CG/CP view Yes Yes
Realtime simulation Yes No

Design features

OpenRocket RockSim
Basic components Yes Yes
Freeform fins Yes Yes
Tube fins No Yes
External pods No Yes
Canted fins / roll stabilization Yes No
Standard component libraries No Yes
Decals No Yes
Clustering support Yes, modifiable Yes, one-time wizard
Staging support Yes, unlimited Yes, 3 stages

Simulation features

OpenRocket RockSim
Degrees of freedom 6DOF 4DOF
Supersonic simulation Limited accuracy Yes
Geodetic calculation (Earth coordinates, coriolis effect) Yes No
Simulations extensible by own code Yes No
Simulation animation No Yes
Plotting any simulated variables Yes Yes
Exporting simulated data Yes ?

Optimization and analysis

OpenRocket RockSim
General design optimization Yes No
Mass optimization Yes (using general optimizer) Yes
Stability analysis Yes ?
Drag analysis Yes, per component ?
Roll analysis Yes No


OpenRocket RockSim
Schematic view Yes ?
Stability information Yes ?
Basic simulation results Yes ?
Parts list Yes ?
Nose cone profile Yes ?
Fin templates Yes ?
Fin placement guide Yes ?
Export to PDF Yes ?