QDistance is a global and local model quality estimation algorithm using predicted inter-residue distance by trRosetta. It supports inputs of both single model and multiple models. Blind tests in the CASP14 experiments showed that QDistance (Yang_TBM) was robust and ranked among the top performers. Especially, QDistance was the top 3 local QA method and made the most accurate local prediction for unreliable local region. The returned results include: