YouTube
After discovering that Google has removed the VR capabilities from the IOS iPhone versions of its Apps, I looked around for alternatives, and stumbled upon a solution on YouTube, ironically also a company owned by Google.
And it actually looks to be the better solution, because its great reach.
And this version is a series of linked photo-spheres, including one doctored with Affinity and containing a video.
YouTube Smartphone App
This Photo-Sphere can opened on a regular smartphone for a full-screen VR effect, and using an inexpensive VR-headset such as Google-Cardboard, for an even better immersive experience.