Simple Rockets is a realistic space simulator that costs $1.99 and also includes in app purchases.
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Pro Rewards creativity
It's really fun to experiment with the essentially infinite rocket designs you can come up with.
Pro Low barrier to entry
Simple Rockets is a breeze to pick up and play thanks to the swift way it allows one to build a rocket right off the bat and launch it.
Con Includes in app purchases
Simple Rockets, despite being upfront paid at $1.99 also includes in app purchases that are $0.99 per item which can be seen as costly due to having already "purchased" the app.