Don’t Recommend
I saw reviews from 3 years ago stating the app does not include all of the current DMC floss numbers. I naively trusted that the developers would have fixed that problem having known it was an issue 3 years ago. They have NOT. There is also no option to add your own which should be an easy workaround. It looks as though the developers have not done anything at all with this app for many years as the privacy statement says that Apple are still waiting for them to complete this.