# Grbl Controller

> Compact android mobile application for grbl powered cnc machines.

Canonical page: [https://chrome-stats.com/d/in.co.gorest.grblcontroller](https://chrome-stats.com/d/in.co.gorest.grblcontroller)

## Overview

- **ID:** `in.co.gorest.grblcontroller`
- **Platform:** Android
- **Type:** Android app
- **Status:** Available
- **Publisher:** zeevy
- **Category:** TOOLS
- **Downloads:** 87,465
- **Rating:** 4.42 / 5 (516 ratings)
- **Version:** 2.56
- **Last updated:** 2020-05-24
- **First published:** 2017-08-28
- **Publisher country:** IN
- **Data as of:** 2026-09-11
- **Store listing:** [Google Play Store](https://play.google.com/store/apps/details?id=in.co.gorest.grblcontroller)
- **Website:** [https://zeevy.github.io/grblcontroller/](https://zeevy.github.io/grblcontroller/)
- **Privacy policy:** [https://gorest.co.in/grbl-controller-privacy-policy.html](https://gorest.co.in/grbl-controller-privacy-policy.html)

## Description

Grbl Controller is a compact Android application designed to control CNC machines powered by GRBL 1.1 firmware. It enables users to stream G-Code files directly from their smartphones using Bluetooth or USB OTG connections. The app supports real-time machine status reporting, buffered streaming, and intuitive jogging controls including corner jogging for precise operations.

Additional features include support for probing and auto Z-axis adjustments, manual tool changes, and customizable command buttons to enhance user efficiency. The paid version offers job resume, job history, haptic feedback, and support for additional axes, making it a versatile tool for CNC operators. Compatible with Android devices running Kit Kat (4.4) or higher, Grbl Controller supports popular G-Code file extensions and operates efficiently even in background mode to reduce power consumption. Comprehensive documentation and support are available through its GitHub repository.

## Rankings

- #234,795 — Overall

## Review summary

Users appreciate Grbl Controller for being a reliable, ad-free, and intuitive app that effectively controls CNC machines via USB or Bluetooth. It works well across various Android devices, especially Samsung phones. However, multiple users report connectivity issues where the app shows as connected but controls remain inactive. Compatibility with newer phones can be problematic. Users also desire additional features like laser mode support, .nc file preview, and improved developer communication.

### Pros

- No ads, free version fully functional without limitations
- Easy to use, simple and intuitive interface
- Reliable connection with CNC machines over USB or Bluetooth
- Works well on various devices including Samsung phones
- Developer is responsive and frequently updates the app

### Cons

- Issues with connection showing as 'connected' but controls are unresponsive
- Some compatibility problems with newer phones or certain devices
- Lack of features for laser mode and advanced CNC functions (like air assist)
- No .nc file preview in current versions, users want this in paid version
- Difficulty contacting developer via provided email addresses

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Source: [Chrome-Stats](https://chrome-stats.com/d/in.co.gorest.grblcontroller)