While the basic tools come free in every version, you can unlock new sets of brushes a-la-carte from the Brush Market. If you have a subscription, all brush packs are available for you to use.
To purchase new brushes:
- Tap a brush in your tool wheel/bar
- Scroll down to the Brush Market
- Tap Buy on the right side
From here, you can choose to upgrade to a subscription or make a one-time purchase.
Please note that one-time purchases cannot be shared across platforms–they can only be shared within the same device ecosystem, for example, iOS to iOS. If you use multiple devices and platforms, you will need to repurchase the brushes individually on each platform or consider a monthly/yearly subscription.