EZ ROM Patcher vs UniPatcher

EZ ROM Patcher is a free browser tool for applying patch files to game ROMs, producing modified games such as fan translations, ROM hacks, bug fixes, and restoration patches. The maker says patching runs on the user’s device and that ROMs and patches are not transmitted to a server. It supports IPS, BPS, UPS, APS, RUP, PPF, BSDiff, xdelta/VCDIFF, EBP, and Star Rod .mod patches. A patch creator compares an original ROM with an edited copy and can create IPS, BPS, UPS, APS, RUP, PPF, and EBP patches. A separate checksum tool calculates CRC32, MD5, and SHA-1 hashes and compares them with entered values or .sfv, .md5, and .sha1 files. ZIP archives can be unpacked, with a choice of patch when an archive contains several; RAR and 7z archives must be extracted first. The site says it works in mobile Safari and Chrome, although large disc images may exceed a phone browser’s available memory. Some patch formats include checksums the tool checks, while IPS, PPF, xdelta, and BSDiff do not record one. No account is required, and users supply their own ROM files.

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.