Delta Patcher vs UniPatcher

Delta Patcher is a free desktop application for creating and applying xdelta patches to files on Linux, macOS, and Windows. Create mode records the differences between an original and modified file in a new patch. Apply mode takes the original file expected by that patch and its matching .xdelta file to produce a patched output. The application includes the xdelta3 engine, so a separate command-line installation is not needed. Checksum validation can flag a source file that does not match, and users may preserve a backup of the original. Creation settings include compression level, secondary compression, source window, checksum, and an optional description. Version 3.1.5 added support for files larger than 4 GB. Delta Patcher is open source under GPL-2.0. Downloads are ZIP archives hosted on GitHub, with no separate installer. The project directs users to GitHub for issues, discussions, source code, and releases.

UniPatcher is a free Android app for applying patches to ROMs from older console games, rather than native Android games. Users select a ROM, choose a patch, specify an output file, and start the operation with the round button through the Files app or another file manager. Supported formats include IPS, IPS32, UPS, BPS, APS for GBA and N64, PPF, DPS, EBP, and XDelta3. The app can create XDelta patches, repair checksums in SMD or Genesis ROMs, and remove SMC headers from SNES ROMs. Compressed games and patches in ZIP, RAR, or 7z format must be unzipped first. The project is licensed under GPL version 3. Its privacy policy says the app does not collect or transmit personally identifiable or location data and does not share personal information with advertisers, vendors, or analytics providers. Google Play reports no data collected or shared with third parties. Boris Timofeev is listed as developer. Bug reports use GitHub Issues, while questions and feature suggestions use GitHub Discussions; translation contributions go through Weblate.