The PopuTag Crypto mobile app is made to the highest standard of security by an engineering team with extensive experience in the cryptocurrency industry. However, you should be aware that any app is only as secure as the mobile device it is running on. PopuTag products “connect” to mobile phone by just a user tap NFC. This process is safe, but only if the computer itself has not been compromised. But because the PopuTag is not designed for large amount crypto asset storage, so if even if your mobile already hacked, you won’t have big lose, because your mobile phone must value much more than a PopuTag products. In this way, we think PopuTag is not vulnerable for our users, financially.