In this study, we explored effects of aging on conflict processing in a large-scale dataset from the cognitive training platform Lumosity. The dataset containes data from 1200 users distributed equally over six age categories that are equally spaced over adulthood. We analyzed trial-by-trial data of a Stroop task inspired game, to investigate effects of age on conflict processing. Since all users had played the game at least 60 times, we could relate the age effects with practice. Analyses of mean response times and accuracies indicated a rather constant increase in response times and congruency effects with age. We further investigated the temporal dynamics of the conflict by means of inspecting delta plots and Lorenz-interference curves, to gain insights into age related changes on the processing level. Such changes could be seen and they were, again, rather constant over the course of adulthood. However, these changes were counteracted by high levels of practice.