Android only installs an update signed by the same key as the version already on your device. This timeline shows every signing key we've seen for Amazon Kindle: Reading App. One known signing key across every release we hold.
8.152.1.0(2.0.91177.0)
Current key1 release · Jul 27, 2026Every key we have ever recorded for Amazon Kindle: Reading App. New builds are compared against this set; a build signed by none of them is what our badge calls a mismatch.
