This is fake-ware ! Do not buy this!

Since even the iPhone6 hardware has a maximum physical limit of 60fps its *impossible* for software like this to crank that up to 1000fps. Its completely fake, so dont be gullible! I only downloaded this so I could warn you.
If you want something useful for your iPhone6 then get TruSloMo. Ive been using it about 6 months now. Easily lets you modify *any* existing iPhone6 video shot at 60fps to have multiple slo-mo sections, or modify an existing video captured in "slow motion". Best of all it saves as a copy, in a format that your Windows PC will have no problem displaying; the original video is left alone (Note that native iPhone6 videos shot at 60fps dont display well in a Windows7 PC so this conversion is very useful).

If you want to understand this better go to your local camera store. They can probably explain all this in detail.

Good luck.

FAAAbio about SloPro, v3.3