So I am building an android/windows app for a library management system that is close to release, as of now the app stores the data either locally (on device) or in the cloud (Gdrive, Onedrive). I have been studying about blockchain and I was wondering if an existing android app like mine can integrate with blockchain to store data? If so, How do you do that? Mind you, I do not want to build a new dapp, I just want to store the data generated by the users of my app in a blockchain.
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You can use ipfs to store data of your dapp. Basically ipfs is also like a blockchain. When you send data to ipfs it gives you a hash than you can publish that hash on blockchain. Ipfs is free. And when you store data directly to blockchain, it will be costly than storing a simple hash. That hash will be used to identify ur data.

Aryan
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Thanks for your reply, Ipfs is used with dapps right? I wanted to know if I can store the data of a normal android app (NOT a dapp) on blockchain. – Aswin Thotapalli Nov 12 '21 at 04:05
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Yes you can!!! Also you can store you website on ipfs – Aryan Nov 13 '21 at 09:03