COMMUNITY-DRIVEN PROJECT

Voice Control for Your Gym Monster.

The ultimate hands-free training assistant. Experience zero-latency control for precise weight adjustments, keeping your focus on the set, not the screen.

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App Store

Download

Google Play

Get it on

Three Simple Steps

Apple iOS
  1. 1 Insert GM dongle in Gym Monster
  2. 2 Open app
  3. 3 Start exercising
android Android
  1. 1 Insert GM dongle or pair via Bluetooth
  2. 2 Open app
  3. 3 Start exercising
VOICE COMMANDS

Features

Simple commands for fast control during your workout.

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Turn On

Turn your machine on using a voice command.

Jarvis, Turn On
power_off

Turn Off

Turn your machine off instantly with your voice.

Jarvis, Turn Off
fitness_center

Change Weight

Adjust the training weight without touching the screen.

Jarvis, Change 5 to 10 pounds
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Change + Turn On

Change the weight and then power on in a single command.

Jarvis, Change 5 to 10 pounds and then Turn on
CHOOSE YOUR SETUP

Hardware Selection

Whether you want a professional turnkey solution or a custom DIY build, we provide the tools you need for total control.

verified OFFICIAL RECOMMENDATION PLUG-AND-PLAY

Pre-installed GMVoice Dongle

The ultimate professional choice for seamless, zero-latency integration. Guaranteed high-speed Bluetooth communication with enterprise-grade stability. No setup, no flashing, just plug in and train.

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Zero Latency
bluetooth_connected
Auto-Pairing
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Encrypted

Ships globally. 1-year hardware warranty included.

DIY Community Supported Hardware

verified OFFICIAL RECOMMENDATION
smartphone
M5Stick S3

Ultra-compact with built-in battery and vibrant OLED. Our community favorite.

BUY FROM REGION

usb
M5Stack AtomS3U

Minimalist USB-C stick. Perfect for a clean "plug and forget" dashboard setup.

BUY FROM REGION

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Waveshare ESP32

Professional maker choice. E-Paper support for low-power custom dashboards.

BUY FROM REGION

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Ready to Flash?

flash.gmvoice.tech

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KNOWLEDGE BASE

Latest from our Blog

Insights, tutorials, and updates from the GMVoice development team.

SETUP GUIDE 5 MIN READ

How I Tell New Users to Start with GMVoice

A simple first-person walkthrough of what to buy, why it matters, and how to get GMVoice running in minutes.

Read More arrow_forward
ORIGIN STORY 4 MIN READ

Why I Built GMVoice

After a year of heavy training, my Bluetooth ring died. Pedals weren't cutting it. So I engineered something better.

Read More arrow_forward
GUIDE 5 MIN READ

Top 5 Speediance Accessories

Looking for the best Speediance upgrades? We rank the top 5 must-have accessories for Gym Monster 1 & 2 in 2026.

Read More arrow_forward
JOIN THE MOVEMENT

Connect with the Community

Share your setups, get troubleshooting help, and talk shop with other athletes and makers. Join the conversation across our social channels.

Facebook
Reddit
YouTube

Frequently Asked Questions

How much does it cost? expand_more
The firmware and the companion app are provided as part of this community project. You only need to purchase the M5Stick S3 (~$20). For the microphone, you can use your existing headphone, an external mic like Boya Mini 1, or even your phone's built-in microphone.
Does it work with Gym Monster 1 and Gym Monster 2? expand_more
Yes. GMVoice is fully compatible with both Speediance Gym Monster 1 and Gym Monster 2. The companion app connects to your Speediance via its standard interface.
Do I really need a dongle for iOS? expand_more
Yes, for iOS devices, a dedicated GMVoice dongle or compatible hardware is required. Apple's strict Bluetooth and USB-C profiles require specific handshake protocols to ensure zero-latency communication with gym equipment. Our dongle acts as a secure, high-speed bridge between your iPhone and the trainer.
Which DIY hardware is best for me? expand_more
It depends on your goals:
  • M5Stick S3: Best for general use. Compact, has a screen, and great battery life.
  • AtomS3U: The minimalist choice. Extremely small, ideal for "hide-and-forget" setups.
  • Waveshare ESP32: Best for custom dashboards thanks to its E-Paper display support.
How do I flash the firmware? expand_more
Visit our official flashing tool at flash.gmvoice.tech. Connect your supported device via USB, select your hardware model, and click "Flash". No coding knowledge required — our web-based installer handles everything in seconds.
Does it require an internet connection? expand_more
No. Voice processing happens entirely on the device — offline. No cloud, no internet, no data collection. Your privacy is fully respected.
Will GMVoice always be free? expand_more
We want to be upfront with you. During the beta, everything is free. Once GMVoice leaves beta, there will be an annual subscription of approximately €2.99 per month. This covers ongoing development, new features, updates, and keeping everything running smoothly.
Is the app free? expand_more
Yes! The core GMVoice mobile application for both iOS and Android is free to download and use for basic voice control. Some advanced analytics and custom profile features may be part of our Pro community tier in the future.

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