The latest signed build. On Android, allow “install unknown apps” for your browser, then open the downloaded file.
com.weesperapp · self-signed · your keys never leave your device
On a computer run sha256sum weesper.apk and compare it with the SHA-256 above. To check the signer run apksigner verify --print-certs weesper.apk and compare the certificate digest. If either differs, do not install it. Machine-readable: version.json. See Security for what Weesper does and does not protect.