Dikota is a contact app built for your digital identity. The app allows you to connect with other digital identities and automatically synchronize their contact information. The app is written with Nativescript+Angular and is available on Google Play Store and Apple App Store. An overview of the Diatum identity network is given here.
CoreDB: Install a node OR Find someone hosting a node
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Portal: Create an identity with browser
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Dikota: Attach contact app to your identity
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Jupstream: Attach media sharing app to your identity