Downloading Dynaper 1.5.9 for Mac from the developer's website was possible when we last checked. We cannot confirm if there is a free download of this app available. The actual developer of this free Mac application is Marek Hrušovský. We recommend checking the downloaded files with any free antivirus. Dynaper for Mac belongs to Theming Tools.
From the developer:
Dynaper lets you create your own dynamic desktop wallpaper. This application makes it easy to create a native time/solar-shifting/light&dark HEIC wallpaper that changes throughout the day. You simply drag and drop your images and change the display time for each image. Dynaper will change time automatically if the image contains EXIF metadata or a time suffix in the filename.
You may want to check out more software for Mac, such as Pic-a-POD, Desktop Wallpaper Construction Kit or Fireplace 3D, which might be similar to Dynaper.