Would be nice to have a place in the app to store my # for FNM etc. If it is already a feature, please let me know as search has come up empty.
If you have your number, you can link your iMtG profile with your DCI profile by entering it in the appropriate field. From there you can view it by clicking the Planeswalker Points banner that will be visible on your iMtG profile.
Although I do think an offline storage would be nice. Maybe on the home screen somewhere, so you can just type it in.
Just store it in your phone as a phone number as contact dci.. It's 10 digits