For the very first time since its release last November, Abstract puzzler Blueprint 3D is available as an App Store freebie.
FDG's game presents you with a scrambled 3D blueprint which can be spun along its axes. Your challenge is simply to manipulate the image until its fractured lines come together to form a cohesive whole.
It's not as simple as just pawing at your touchscreen in the hope of a lucky guess, though, and if you're playing in pursuit of those precious three-star ratings, you'll have to be fast and accurate to succeed.
We adored Blueprint 3D's quickfire puzzling, and we made our feelings known in front of friends and family in the form of a glowing 5/5 AppSpy review.
There's no word on how long Blueprint 3D will remain free, so our advice would be to swoop in and grab this gem while you can.
You can thank us later.