If you are away, your home may become a target.
A remote “house sitting” service that visits your home every day (at different and unpredictable hours) and produces “signs of life” so anyone watching it will think people are regularly there.
Even if you have a good password for your computer or an online service, it can still be compromised by physical (someone watches you) or technical (key logger) means.
Build a mechanism that allows you to specify two or more passwords for the same account (making sure all of them are good and hard to crack.) Each time you can use any of them except the last one you used. This way if you have been compromised the password thief will still not be able to log in. If you use 3 or more passwords, it will be even safer.
To protect from pickpockets and other thieves.
A “beacon” that you wear on your person that your smartphone can detect. You can turn on the theft protection, and when your phone is taken a certain distance from the “beacon,” it sounds a loud alarm (even if the phone is set to silent mode and the volume is down.) When you put the phone down (at your office for instance), you can switch to motion mode, and the phone will sound the alarm when moved and not when you’re away.
To help remind you when you need to apply more sunscreen.
Have a “smart” patch you stick on your exposed skin that monitors the amount of sun you are exposed to and alerts you to put some more sunscreen when you have reached a certain exposure level.
Every security system has fixed parameters. The number of cameras and when and what they cover over time. This is a vulnerability.
By having a video camera-carrying drone perform check flights, at random times and in random flight paths, the predictability of the security system is reduced.
Icon made by Freepik