No I think they have a couple of apps bundled into one. You buy one for 1.49 and can unlock the others for .99 each as an "in app purchase". Something like that.
I have SKRWT on all my devices and paid only once. Can't remember how much it cost back then but 1.50 sounds about right. I would remember if it was much more than that
Just try it!
Many people don't know this but if you don't like an app you can always cancel & get a refund within 2 hours of purchase. Thats a standard policy for all google play apps, and automatically handled by google play store. The developers have nothing to say in this, only after these 2 hours its up to the developer to refund or not.
This does not apply to in-app purchases and abos but for all normal app purchases.