Storing data

I have a question, is it possible that it can store data even if blynk app is not open but my hardware is turned on?

Yes, use Virtual Pins.

Really? Even if my android device gets lowbat it can store the data as long as the hardware is turned on?

Your android device stores nothing… the Blynk server (cloud in your case) stores the data.

Your phone/device is merely acting as a screen to look at the data from the server… hence why a sever is needed.

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