Pixtolab, developers of the very popular A+ Signature app, have launched a brand new app called Mix on Pix for iPhone/iPad. Its versatility allows you to add text, annotations, watermarks, photos and logos to your existing images.  Mix on Pix follows in the steps of the popular A+ Signature app, with major improvements in features and customisation. Pixtolab was founded in 1987 and has specialised in mobile development since 2009. An independent studio, Pixtolab is driven by life partners Francois Robert and Linda Tsibucas. The developer and artist team continue their goal of creating top quality apps to help users be productive, create artworks and have fun. Robert explains “Sometimes,…