Good to see some competition, the FlipperZero is very pricey for what it is. Then again, I guess you're paying for the software.
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This is still at breadboard stage. If you want to put something together for yourself at sub $35 you can. It's just not going to be portable, pretty, or probably even usable. I carry my flipper zero everywhere for a variety of tasks.
The flipper zero isn't doing anything special that you we haven't been able to do for decades with a variety of parts.
* SubGHZ, you need an RF module.
* Bluetooth? yep
* IR, you need IR,
* network, hey WiFi.
* SD card for any kind of storage? yep, another module
* USB anything but charging? Yep, more wires and modules.
But hey, most devices want at least 4 wires (VCC/GND/A FEW SIGNALs), and other devices want more, to handle clocks and timing. And that's only if your thing supports IC2 and you have enough GPIO. Otherwise you need multiplexers.
Any one of these things can be done with less than a dollar in parts. But have fun combining them all into something workable AND can do them all.
But hey, you are paying for the software right?? Come on.
Yeah. I've got raspberry pis, and some USB Wi-Fi adaptors specifically bought for having monitor mode, and a few different RTL-SDRs, and a HackRF One, and an Ubertooth One.
But I'm _way_ more likely to have my FlipperZero with me when my curiosity is piqued while out somewhere. I'll often have it in my pocket to use as the world's most expensive tv-b-gone.