If you have your printer paired with your tablet via Bluetooth, make sure that the printer is no more than 5 meters away from the tablet and that there are no obstacles between them. Try bringing the printer closer to the tablet to see if printing has improved.
If you have the printer connected with a USB cable directly to your 14 "or 15" box, make sure the USB cable is plugged into the socket labeled USB-OTG. In other USB jacks, the printer may not work properly and the printer may print choppy.
If the problem persists, contact customer support by email at pomoc@storyous.com or by calling +420 602 405 047.