Do I need separate storage and microcontroller for a device

Hi, I am working on a project for a device that would transmit data to a phone/computer. I know I would need a 3 axes accelerometer and a 3 axes gyroscope, a Bluetooth transmitter and a battery. I’m not certain about additional electrical circuitry that would be required for it to work. Do I need to also have flash storage to store the data before it’s transmitted to the phone/computer via a Bluetooth device or USB? Do I need a microcontroller or microprocessor in this device for it to function?

I’m only interested in reading the data on an app not the device itself. Engineering is not my field so sorry in advance for what’s probably considered a very dumb question to this community.

Any help would be greatly appreciated.

Thanks you

If you’re not sending the data live, you’re going to need someplace to store the data. You will need a micro controller of some sort to retrieve data from an accelerometer.

I really appreciate the response. Thank you