Xref Aosp Free Best

(community / self-hosted) – Some public instances (e.g., http://xref.droidsolutions.com/) offer AOSP mirrors. – Ideal if you need advanced indexing and cross-reference links.

Jane, an Android security researcher, used to pay $200/month for a hosted AOSP xref tool. After switching to a self-hosted OpenGrok setup (free), she discovered a use-after-free bug in surfaceflinger within two days. xref aosp free