The free version of Waterlogue includes quite a bit:
The first style in each style collection is unlocked and fully usable—and we chose the best style to be first! These styles export with a small Waterlogue signature in the lower-right corner of exported images.
Exported images in the free version are limited in resolution.
Our best enhancement feature, Enhance, is turned on by default so your paintings look great right away.
All other features and styles are free to try, so you can explore everything Waterlogue has to offer. However, a full watermark will appear across renderings that use locked features.
To remove all watermarks and signatures, unlock every style and feature, and export at full resolution, you can subscribe or purchase Waterlogue Unlimited.
I already own Waterlogue!
Great news—the upgrade to Waterlogue Unlimited is free for all one-million-plus current users of Waterlogue! Just download Waterlogue 2.0, and your purchase will be recognized automatically.
More information is available here: How do I get my free upgrade to Waterlogue Unlimited?