Use this angled blush brush for more controlled application of blush. Smaller versions are even used for contouring.
Regular dome shaped blush brush. Applies blush over a wider surface area.
Stippling, duo fibre brush to help with a light handed dust of powder blush or to gently apply creme blush.
Fingers or sponges can also do the trick for cream, gel and stain blushes.
Blushes come in different forms: cream, powder, gel and stain.
There are multiple brushes out there for blush. The more you play around, the more you'll gain a preference.
Do you have a favorite brush and blush? Right now, my run to blush is MAC's Harmony for my NC37 skin and I use different brushes depending on how I feel. I may use a stippling/duo fibre brush or a small angled blush brush.