Check out the beta version of a new web-based 3D painting app called PaintCube created to work on almost any modern device.
A range of familiar painting tools that lets you paint directly onto your models in 3D space allowing a seamless UV workflow
The material system lets you customize and edit the way your models look and feel.
The Layer system lets you create and organize layers of texture information as you paint on your 3D model.
PaintCube is web-based and will work on any device with a browser. This means you can work on your textures across your computer, laptop and tablet (coming soon).
PaintCube lets you export your finished textures so that you can use them in game engines or VFX applications. You can also export them Photoshop for any further tweaks you need to make.
PaintCube is rental-based ($7 per month or $50 per year). You can also test a free 14-day trial. Learn more here.