![](https://play-lh.googleusercontent.com/a-/ALV-UjXoczwyZ2ZzuW7r9mybZlK4EdBZfYcuvakDyi4gkQ5d5qCHDGMO=s32)
Aaron Lowndes
It's okay, I was buying it so I could experiment with the complex systems builder, a lot like the complex systems in the manual section. Unfortunately complex systems don't seem to be able to be made (i.e. have a separate rope pulling part of the system).
5 people found this review helpful
![](https://play-lh.googleusercontent.com/a/ACg8ocKTgQqWNvZ7TyJLCDRUbC9N_FbPZ8P0IoNzdewWXOJFxGFhow=s32-mo)
Madge Mcdonald
Overall this is a good app. However the list of devices to choose from in the mechanical advantage systems builder are only the Petzl ID. I work on a ID however have a sparrow for rescue as it has a much lower friction ration to the ID. Would also like to see some other devices thrown in just for fun as well.
7 people found this review helpful
![](https://play-lh.googleusercontent.com/a-/ALV-UjVnmHrsY05f4wDV4A37FV85Oq_o60-8zF7n1yZY57L4IafMWKBv=s32)
Michael Gray
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The app is nice, but the builder can't do complex systems, only simple and compound. You're also limited to petzl products
1 person found this review helpful