ROM Patcher (Donation) (com.xperia64.rompatcher.donation) on Google Play
Note: For now this version is functionally identical to the free version, but features a slightly nicer basic material interface. Buy this app if you want to support future development of ROM Patcher or need assistance with the app.ROM Patcher is a ROM/binary file patcher that supports IPS, IPS32, UPS, BPS, PPF, XDELTA1, XDELTA3, DPS, ASM, XPC, DLDI, APS (both GBA and N64), and BSDIFF patch types. It also supports decompressing ECM files via unecm. Simply choose a file to patch, the patch itself, and optionally an output file name and tap "Patch".