https://www.popsci.com/diy/what-to-do-with-old-iphone-ipad/
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Digital Picture Frame
We know you forget to print photos, so why not add a digital display instead? Image: Justin Pot/Popular Science
There’s no shortage of digital picture frames on the market, sure, but why buy something like that when you can just use your old iPhone or iPad? We’ve talked about using an old iPad as a digital picture frame using a dedicated application called Synced Photo Frame, which can automatically sync with a shared album in Photos. The application works with any iPad capable of running iPadOS 12, which includes most made after 2017. You could probably do something similar with an iPhone, though those have a much smaller screen.