The wedge

Every desktop sender needs a computer at the machine. Gantry doesn't.

gSender, UGS, OpenBuilds Control, CNCjs, bCNC — all brilliant, all tethered to a laptop or Raspberry Pi wired to the controller. Even their "phone" modes are just a browser window onto that computer. Gantry is the sender: plug your phone straight into the board over USB, or pair over Bluetooth. Nothing on the bench.

The usual setupDesktop sendersGantry

A laptop or Pi wired to the machineRequiredNone

Direct USB / Bluetooth from the phone✗✓

Runs with no network at allvaries✓

The screen walks to the machine with you✗✓

Wi-Fi option if you prefer a shop PC✓✓

▶GET IT FREE ONGoogle Play

What it does

Real machine control, in your palm.

01 — JOG & DRO

Live position, thumb jog, from across the shop.

Machine and work coordinates, feed, spindle and state in real time. A thumb XY pad plus Z, with selectable step and feed. Home and zero without walking back to a screen.

Selectable stepWork + machine coordsHome / zero

Thumb jog pad with selectable step and feed

02 — LIVE 3D

Watch the cut render as it runs.

Load a G-code file and see the toolpath draw live — rapids and cuts colour-coded, the tool head moving with the machine. Pan, zoom and rotate while the job streams.

Real-time toolpathColour-coded movesPan / zoom / rotate

Live 3D toolpath — the completed cut rendered on the bed

03 — DIRECT CONNECT

No PC. The phone is the pendant and the sender.

Plug the controller straight into your phone over USB-OTG, or pair over Bluetooth (classic or BLE). No backend, no server, nothing living in the sawdust — just the phone and the machine.

USB-OTGBluetooth SPP / BLEBackend-less

Connected to a GRBL controller — link up, firmware detected

04 — RECOVERY

Never lose a job to a power blip.

Dropped link or a flicker on the mains? Run-from-line recovery resumes from any line with a safe re-entry — retract, rapid to position, ease back into the cut. Plus auto-reconnect, keep-awake and pre-flight checks.

Run-from-lineAuto-reconnectKeep-awake

Gantry dashboard mid-job with live status

05 — PRECISION

Probing, tool changes and surface maps.

Z touch-plate, edge, corner and hole-centre probing, an M6 tool-change workflow, and auto-levelling height maps for uneven stock. A material-aware feeds & speeds calculator and a surfacing wizard round it out.

Touch-plate + probingAuto-level height mapFeeds & speeds

06 — PRIVATE BY DESIGN

The anti-SaaS tool.

No account, no ads, no tracking, no cloud. The app only ever talks to the controller or the server you point it at. Nothing phones home — check the permissions yourself before you install.

No accountNo analytics SDKOpen privacy policy

accounts

ads

trackers

Three ways to connect

Wire it up however your shop is set up.

Direct is the wedge — but the same app does Wi-Fi and a full offline simulator too.

🔌

Straight to the controller

A USB-OTG cable or Bluetooth (classic SPP or BLE) from phone to controller. No PC, no network — just the phone and the machine. This is the setup no desktop sender can match.

📡

Over Wi-Fi

Prefer to keep a shop PC in the loop? Run the free Gantry server on the machine's computer and control or monitor from anywhere on the network — same app, same interface.

🧪

Try with no hardware

A built-in GRBL simulator runs every feature — jog, stream a real job, watch the live 3D, test recovery — with nothing plugged in. The honest way to evaluate it before you go near your machine.

Free · no machine, no purchase, no risk

See the full demo

Phone in one hand. CNC in the other.

Why trust it near your machine

Built on what you already run.

⚙️

Standard GRBL, nothing exotic

Same G-code, same limit-switch and soft-limit behaviour, same real-time overrides you already trust — over GRBL 1.1, grblHAL and FluidNC. Gantry speaks the protocol, it doesn't reinvent it.

🧪

Verify it yourself first

The full simulator runs every feature with no hardware. Test jogging, streaming, recovery and the 3D view before you connect anything — then decide.

🔎

Nothing to hide

No analytics SDK, no account, no ads. The privacy policy is plain English, and you can inspect the app's permissions on Google Play before installing.

No fake review counts or "trusted by thousands" here — Gantry is new on Google Play, and we'd rather earn it. It's free, the simulator proves everything, and real reviews will speak for themselves.

Fair pricing

The free app is the full app.

Nothing is crippled to sell you the rest. Packs add depth — they don't unlock the basics.

FREE FOREVER The core control loop, no account, no catch

USB & simulator connect · live DRO · thumb jog · homing & zeroing · load and run a job · live 3D viewer · console & event log · real-time overrides · and the plain-English alarm decoder — always free, because safety shouldn't be paywalled.

Connect

$4.99

Networking & Bluetooth links, plus grblHAL / FluidNC multi-controller support.

✓ Try free in the simulator

Precision

$5.99

Probing cycles, M6 tool changes, auto-level height maps and custom macros.

✓ Try free in the simulator

Design

$6.99

Image & vector → G-code (outline, V-bit, 2.5D relief) and webcam edge-finding with AR overlay.

✓ Try free in the simulator

Pro Shop

$5.99

Feeds & speeds, batch mode, gamepad jog, unlimited profiles, extra themes and $$ settings manager.

✓ Try free in the simulator

Best value

All Access

Every pack. ~~$23.96~~ bought separately

$16.99

One purchase — you save $6.97

Buy once. Yours forever.

Every pack is a one-time purchase through Google Play. No subscription, ever — and the standard Play Store refund window applies.

Prices shown in USD; Google Play converts to your local currency at checkout. Try any pack's behaviour free in the simulator before you spend a cent.

Questions

Good to know

Do I need a computer at the machine?

No. With direct-connect you plug the controller into your phone over USB-OTG or pair over Bluetooth, and the phone is both the pendant and the G-code sender — nothing else on the bench. If you prefer, you can also run the free Gantry server on a shop PC and connect over Wi-Fi.

Which machines and firmware are supported?

Any controller on the standard GRBL path: GRBL 1.1, grblHAL and FluidNC. That covers Shapeoko, X-Carve, OpenBuilds LEAD/1010, MPCNC, LowRider and most home-built GRBL routers and lasers.

Is it really free?

Yes — core control, monitoring, the live 3D viewer, the built-in simulator and the alarm decoder cost nothing and need no account. Advanced features come as optional one-time in-app purchases. There is no subscription.

Can I try a paid pack before buying it?

Yes. Every pack's behaviour runs in the built-in simulator with no machine and no purchase, so you can see exactly what it does before deciding. Purchases are one-time and yours forever.

What data does Gantry collect?

None for the developer. No account, no ads, no analytics, no tracking. The app only communicates with the controller or the server you connect it to. The privacy policy is public and you can inspect permissions on Google Play.

Is it safe to run a CNC from a phone?

A CNC machine is powerful and can cause injury regardless of what controls it. Gantry follows safe-machining practice — pre-flight checks, an always-visible state and emergency-stop — but you should always keep clear of the machine, know where your e-stop is, and never leave a running job unattended.

Untether from the laptop.

Install Gantry and jog your machine from your phone in the next five minutes — with the simulator, you don't even need it plugged in.

▶GET IT FREE ONGoogle Play

Safety: a CNC machine can cause serious injury. Always follow safe machining practice, keep clear of the machine, know where your emergency stop is, and never leave a running job unattended.