"The Transporters" intervention contains 15 animated episodes that autistic children watch daily for a month and learn emotion recognition through stories depicting social interactions between vehicle characters with grafted human faces, expressing emotions. Its automated, home-based format is cost-effective. This study included four groups of young Chinese children in Hong Kong: two intervention groups (an autism intervention group and an autism + attention-deficit/hyperactivity disorder (ADHD) intervention group), an autism control group and a non-autistic group. The autism + ADHD intervention group was one that had not been separately examined before. In this study, "The Transporters" episodes were delivered via an App instead of the dated DVD technology. Following "The Transporters" intervention, both autism and autism + ADHD intervention groups improved significantly and similarly on emotion recognition and were more like the non-autistic group, while the autism control group did not. Learning was generalizable to novel situations/characters. There was no dosage effect, with the standard recommended number of episodes viewed as sufficient for significant improvement. Besides confirming the effectiveness of "The Transporters" for young Chinese autistic children, this study contributes to the literature/practice by expanding the range of applicability of "The Transporters" to autistic children with ADHD, which is important given the high co-occurrence rate between autism and ADHD.