In scARE, we compiled scRNA-seq dataset from 12 studies in Alzheimer’s disease, Parkinson’s disease, and multiple sclerosis, to reveal RTE dynamics in disease and cell types. In total, we quantified RTE expression in more than 600,000 cells and built a single cell atlas of retrotransposable elements (scARE) to host these data. We also provide various search and browse options, including searching for RTEs, genes, diseases or datasets by single term and multiple terms, browse by RTE, cell type, disease, and dataset. Furthermore, we implemented a discover option to highlight most expressed, differential expressed or co-expressed RTEs under given conditions.