When you land on app9.cloud.appspace.com, the first thing you'll notice is how little there is. No about page, no contact information, no social media links, no privacy policy. For a standalone website, that's a problem. Legitimate services, no matter how small, usually give you some way to reach them or learn who they are. This site offers none of that.
Even the domain itself is a subdomain, which can be a red flag because it costs nothing to set up and can be abandoned easily. There's no history in the Wayback Machine, so we can't see if it's been around long enough to build a reputation. On the plus side, the connection is encrypted properly and the hosting is on Google Cloud, so the technical backbone is solid. But those positives don't outweigh the lack of transparency.
If you're wondering whether app9.cloud.appspace.com is safe, the honest answer is that there's not enough evidence to say yes. Because the site hides who it is and what it does, the smart move is to steer clear until it shows up with real information and a verifiable track record.