Let me be upfront: the process is super easy, but I know it can feel intimidating the first time.
What You Need First (and Why)
You only need one compatible device:
- M5Stack AtomS3U
Instead of hunting random store links, just use the hardware buttons on the main page and choose your region from there: open the Hardware section.
Quick tip: If you find a different listing elsewhere, send it to me first and I will confirm if it is the right model. You can also email me at contact@gmvoice.tech.
Step 2: Flash Firmware
Once your device arrives, connect it to your Mac, Windows PC, or Linux machine with USB and open the official flasher: flash.gmvoice.tech.
There is a short video there that shows the full process. The reason this step matters is simple: this is what turns a generic dev board into a GMVoice device ready for your gym workflow.
Step 3: Plug into GM and Use It
After flashing, use the same cable, connect the device to your GM, and you are ready. No complicated calibration routine, no advanced setup flow.
Once it's running, it's worth kitting out your machine — see our guide to the best Speediance Gym Monster accessories for benches, straps, platform extensions and more.
Try the App Even Before Buying Hardware
You can download the iOS app right now from the App Store.
Go into settings, enable what you like, and try voice commands immediately. I recommend this because you can validate recognition and the overall UX before spending anything on hardware.
Want Updates?
If you want updates and early announcements, join the mailing list here: join the waitlist. Or write to me directly at contact@gmvoice.tech.
Try GMVoice
Download the app, choose the mic setup you already have, and start training with your voice.
Related guides
- What Is the Dongle API? Faster, More Stable Gym Monster Commands
- GMVoice vs Gym Monster Ring: Honest Comparison After 6 Months (2026 Review)
- Best Speediance Gym Monster Accessories (2026): Tested & Ranked
Planning your next session? GM Manager builds Speediance workouts in your browser.