Browse, Search and Bookmark UTF-8 Characters
Browse, search and bookmark characters in the UTF-8 encoding system. You can view the decimal, hexadecimal, HTML entity and name of each character. It lets you customize the code formats, save up to 256 bookmarks (exportable/importable to and from a .csv file) and choose a dark or light theme.
Try the Lite Version
https://play.google.com/store/apps/details?id=com.grantojanen.charactercodechampionfree
Search and bookmark export/import features require Android 4.4 or newer.
More Details
Offline: Yes
Lightweight: less than 1MB
Descriptor: character map and reference
Multi-Window Support (Android 7+): Yes