A custom pattern can be set together and save in a file. The pattern can be shared or loaded from file. It has a built in pattern player. It shows the actual crochet and the next and previous stitches, if there is a change it will say it aloud the number and type of next crochets. If you use a Bluetooth button you can step forward on the pattern with every button press or you can start a timer. The app support statistics: full length of yarn, time need, and project costs etc.