Where and how to view a 360 photo on any device

Hi,
After shooting and editing 360 photo with my new x3 (which I think is great), I'm a bit struggling once I want to share this photo with friend, or just watch is myself. It basically doesn't display in 360 view, but a flat image distorded..
Sorry if this question might have been raised already, but can anyone explain how to display a 360 photo once edited ?
Does it requires a specific app ? since windows or iphone viewer will display the photo as it is (flat)..

Thanks in advance 🙏