In Video Star and VideoFX Live, you can share or import different effect setups. To share them, just tap the QR code at the top of the screen, tap share, after naming it choose where to share it. To import one, go to the section of Video Star that effect works with, tap the QR code at the top and import it from your camera roll.
Check out this video on how to share your codes:
QR Code Types:

Clip Transformer
To Use:
On the Edit Screen, tap New
Tap Transform Clip
Tap on the QR Code at the top left of the screen
Tap Import

Custom Coloring
To Use:
On the Edit Screen, tap New
Tap Transform Clip
Tap on the QR Code at the top left of the screen
Tap Import

Time Slicer
To Use:
On the Edit Screen, tap New
Tap Transform Clip
Tap on the QR Code at the top left of the screen
Tap Import

Sketch Artist
To Use:
On the Edit Screen, tap New
Tap Transform Clip
Tap on the QR Code at the top left of the screen
Tap Import

Color Artist
To Use:
On the Edit Screen, tap New
Tap Transform Clip
Tap on the QR Code at the top left of the screen
Tap Import

Clone City
To Use:
On the Edit Screen, tap New
Tap Transform Clip
Tap on the QR Code at the top left of the screen
Tap Import

Pro Color Lab
To Use on the Record or Re-Effect screen:
On the Edit Screen, tap Record or Re-Effect
Tap the + then tap the 🔎
Search for Pro Color Lab
Tap on it
Tap Color Curves
Tap on the QR Code at the bottom right of the screen
Tap Import
To Use in Multi-Layer:
On the Edit Screen, tap New
Tap on a layer and add your photo or video
Tap Color
Tap on Pro Color Lab
Tap the ^
Tap on the QR Code at the bottom right of the screen
Tap Import

Effect Setup
To Use:
On the Edit Screen, tap New
Tap Record Video or Re-Effect Clip
Tap the +
Tap on the QR Code on the left side of the screen
Tap Import

Multi-Layer
To Use:
On the Edit Screen, tap New
Tap Multi-Layer Clip
Tap on the QR Code at the top left of the screen
Tap Import

Individual Multi-Layer Keyframe
To Use:
On the Edit Screen, tap New
Tap Multi-Layer Clip
Tap on a layer and add some content
Tap on the layer
Tap Edit Keyframes
Tap on the QR Code at the top left of the screen
Tap Import

Custom Curve
To Use:
On the Edit Screen, tap New
Tap Multi-Layer Clip
Tap on a layer and add some content
Tap on the layer
Tap Edit Keyframes
Add a keyframe, and tap on the curve
Tap Custom
Tap on the QR code and Tap Import

Pro Particle Lab
To use on the Record or Re-Effect screen:
On the Edit Screen, tap Record or Re-Effect
Tap the + then tap the 🔎
Search for Pro Particle Lab
Tap on it
Tap Edit Particles
Tap on the QR Code at the bottom right of the screen
Tap Import
in Multi-Layer:
On the Edit Screen, tap New
Tap on a layer
Tap Particles
Tap on the QR Code on the left side of the screen
Tap Import