I don't think I will use an app like Hidden mentioned in the post. It's just a laptop if you back up your data. But using an online service means that they have

I don't think I will use an app like Hidden mentioned in the post. It's just a laptop if you back up your data. But using an online service means that they have access to every activity you do on your computer. I don't think I can trust them. What if they activate the software and record user data without you knowing?