E-ink has been used in a variety of devices, including e-book readers, signs, and even photo frames. It is energy efficient, so devices that use it can last a long time on battery. The BoltStar is a full color e-ink display that can be charged with indoor light. It has an app that lets you send photos to your photo frame via Bluetooth 5.1. BoltStar has up to 236 PPI resolution. It is available in 3.7 and 5.89 inch frames.
This tiny digital frame can be attached to your fridge magnetically. Both models have a stand and let you use them in portrait and landscape mode. You can use one account to manage multiple frames. The companion app is available for iOS and Android devices. It has an AI tool that helps you come up with custom images for your frame. You can find this project on Kickstarter.
