1st dataset 6-months randomized controlled, cross-over study 37 participants wearing CGM sensors and using MDI regimen smartphone app where to record administered insulin and meal macronutrient information diagnosed with T1D for more than 3 years \tightlist 2nd dataset head-to-head glucose monitoring study, comparing CGM and flash glucose monitoring 40 high- risk adult participants using MDI for their insulin treatment \tightlist