Bookmark manager finder3 best Pinterest alternatives in 2021

Pinterest is a bookmark manager with the following features: bookmark icons/images, android app, ios app, dark mode, folder sharing, mobile and tablet support.

Here are some great alternatives.

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A design focused image bookmark manager with collections for collaborating with other people. Has an iOS app.
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Favim has inspiring images from the web and offers tags for filtering.
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Save bills itself as the platform for creative minds. It is essentially an image-based bookmark manager that displays your images as mood boards. It has mobile apps.