I’ll answer the questions I know you have.The app works by saving photos (live or still) to your photo library. You then can set it as your background. ONLY IPHONES COMPATIBLE WITH LIVE PHOTOS CAN USE THE FUNCTION ON THEIR LOCK SCREEN. It won’t work on your iPhone 6s.Yes it’s a paid app. There’s 2 ways. Either $20 per year, or $7.99 a week. There’s a free 3 day trial that after 3 days, turns into $7.99 a week.As for the pictures, they are AMAZING. There’s incredible Live Photos and some really good looking stills. They have anime, game, and car related ones, nature and abstract are some of the best ones as far as animated backgrounds go.I personally think it’s worth $20 per year (less than $2 a month really) for the abundance and novelty.A few issues: Depending on your phone or luck, you may have difficulties or delays in loading the preview for live backgrounds. My wife’s phone had SIGNIFICANT delays in loading previews. She has a 13 pro max, and I have a regular 12, and we have similar usage habits at a similar battery charge. It’s 100% the software.Also, a note: most times, if you tap to download, the button will say downloading, but then it resets back to saying to tap to download instead of saying complete. The picture was still downloaded. The app just isn’t telling you.One more thing: I’m on the trial now. I plan on cancelling and subscribing to the $20 per year one, so I may update this if things change, but upon opening the app, it says I need to sign up and offers the trial even though I already have it. If you try to sign up again, it says you already have it. What you have to do each time is hit “restore” on the bottom right corner. It seems like an easy thing to fix from my limit knowledge of software development, so I hope to see that corrected in the future.TL;DR: worth it, but a couple bugs.