What are some alternatives?
When comparing World Brush and Holo, you can also consider the following products
Heya - Place eggs in AR and leave a secret inside 🐣
Apple ARKit - A framework to create Augmented Reality experiences for iOS
Figment AR - Turn your world into an augmented funhouse
AirMeasure - Turn your phone into a ruler with the power of AR
SPAYCE - Leave memories everywhere (iOS)
Made With ARKit - Hand-picked curation of the coolest stuff made with ARKit