I have a free Android app available using the particles from my Unity asset packages. The app allows you to tap on the screen and trigger particles so you can see them in action directly.
Free app, no ads.
AVAILABLE For Android HERE: https://play.google.com/store/apps/details?id=com.ryanjamesblanchard.particlepreviewera
iOS version is submitted and waiting for review.
For more Unity particles, check out: https://www.assetstore.unity3d.com/#/publisher/647