Progwhiz Hex Editor is a free Android application developed by Mark Raymond. It is a powerful editing tool that offers all the features of desktop editors and more, making it a great choice for users who need to edit their files on the go.

The application offers features like text search/replace, hex search/replace, and text and hex pattern wildcard search and replace. For example, users can search for all the words beginning with "HEL" by using the search term "HEL?" or search for all the words beginning with "HE" and ending with "P" by using the search term "HE?P". The hex pattern wildcard search and replace feature allows users to search for hex patterns that start with 55, followed by an unknown hex value, and then AA by using the search term "55??AA".

With the recent update, the hex wildcard now supports 4-bit, requiring two "???" to represent one 8-bit hex unknown, making the application even more versatile. Overall, Progwhiz Hex Editor is an excellent editing tool for Android users who require powerful editing features on the go.