Periodically check the devices logged into your account and any authorized apps, then remove the ones you no longer use

Cost: No cost at all. It only takes a few minutes each time. The hard part is that there’s no reminder — you have to remember to do it yourself.
In plain terms: “Logged-in devices” refer to the phones and computers that can still access your account right now. Account thieves often lie low for a while before making their move. If you see any unfamiliar devices on the list, or third-party apps you no longer use still linked to your account, log out from all devices and change your password right away.
Benefit: Account theft rarely happens instantly — attackers usually spend some time lurking first. The list of logged-in devices shows all phones and computers currently able to access your account, while the list of authorized apps shows all third-party services you’ve given permission to log in using your account. Any unknown devices or unused third-party apps on these lists are the easiest clues to spot.
Evidence grade: C
Sources:作者经验，无直接文献
Notes: This feature is available in WeChat, Alipay, email accounts, Apple ID, and Android accounts. If you spot any unfamiliar devices, simply log out from all devices and change your password.