jajak Allahu khairan. i really like this app features. But if developer add customize note system and enable/disable ḥarakāt (vowel signs) in hadith then it will be great benefit for student of knowledge.
especially ḥarakāt (vowel signs) will help lot of beginners to understand science of hadith.
insha Allah.
please look at this feedback.
May Allah bless your efforts.