Click on the following link:
https://oss-mathwallet.maiziqianbao.net/ios/mathwallet-installer/index.html
Find the same option as your APP icon and scan the QR code to install (you cannot install without providing UDID to customer service).
Once the installation is complete, immediately back up all important information such as your public chain wallet private keys and mnemonics , then migrate or import it into MathWallet5.
(MathWallet1’s TestFlight beta and App Store versions are expected to be completely discontinued in August. Please be sure to make a backup of the private key and mnemonic of all public chain wallets in advance, otherwise the wallet may be lost.)