A Simple & Free DBT Skills Diary Card App Pop! Pop! LLC Dialectical Behavior Therapy Skills are a must, not just for people who have BPD (Borderline Personality Disorder), but for just about anyone living in this world alongside others. DBT Skills Groups focus on SKILLS. This means that practicing the skills is much more important than anything else. If you are practicing DBT Skills and want a Diary Card app, you can use this product.