Please don’t get upset with me. I certainly understand where you are coming from. I am one of those who uses the phone siddur. My phone siddur happens to have extra prayers that regular siddurim don’t have. It also has English Translations. I use my phone siddur (at least for the Amidah, because of the extra optional prayers and english translations). During Shaharit, I will use a traditional siddur for everything except the Amidah and Tachanun.
I am not perfect, and sometimes I do wish that when the siddur app is open, the rest of the phone would be disabled. All in all, its more good than bad for me (I hope).