It is a separate app entirely from its iPad counterpart, which costs £6.99 / $9.99.
You can find its iPhone port on the App Store for just £1.99 / $2.99.
The game is cross-play compatible with both its tablet and desktop versions.
Here's a video of Paul Kilduff-Taylor from Mode7 Games demonstrating this... with his cat.
Frozen Synapse earned a Silver Award from us when it launched on mobile in 2013.
Our review of it on iPad called it "a very good port of an excellent strategy game."
Here's hoping it plays just as well on iPhone!
Want more? Check out our 14 other Frozen Synapse news stories!