Push-to-talk apps for crane crews for port terminal workers in 2026

Push-to-talk apps for crane crews compared for port terminal workers: OperatorLink, Zello, Voxer, GroupTalk, and Peak PTT.

By 2Dig · 2026-10-17

2Dig is published by the makers of OperatorLink, which is compared here alongside other tools.

Port terminal workers guide the moves of cranes that shift containers, and they need a push-to-talk tool that passes direction signals and holds them visible until the crew registers them. OperatorLink shows STOP, HOLD and SLOW to the jobsite crew in a phone browser ^[1]. HOLD and SLOW stay on until the last person leaves, and STOP releases every held direction on every phone with a full-screen alert ^[1]^[1]. OperatorLink is free to use, and no paid plan is built yet ^[1]. Zello Work costs $8.00 per user per month, or $6.80 with an annual subscription ^[2]. Voxer's Personal plan is free ^[3]. GroupTalk offers a free 14-day trial ^[4]. Peak PTT radio service costs $24.95 per month per radio ^[5]. Compare how long a signal stays up, who can join, coverage, and price.

Option	Up-front cost	Monthly cost	Device and join
OperatorLink	Free, no paid plan built yet ^[1]	Free ^[1]	Phone browser, no app install; crew joins from a shared link or QR code ^[1]^[1]
Zello	Free 14-day trial, no credit card required ^[2]	$8.00 per user per month, $6.80 with annual subscription ^[2]	Runs on iOS, Android, Windows, and Mac ^[6]
Voxer	Free for individuals ^[3]; 14-day free trial ^[7]	Not published	Not published
GroupTalk	14-day free trial ^[4]	Not published	Private cloud or on-premises deployment ^[4]
Peak PTT	$229 per radio plus $19.95 activation fee ^[5]	$24.95 per month per radio for unlimited push-to-talk ^[8]	LTE radio hardware transmitting over AT&T's nationwide network ^[5]

What port terminal workers need from push-to-talk apps for crane crews

A port terminal worker guides the moves of a crane that lifts and shifts containers, often where the operator cannot see the load from the cab or from the yard. The person on the ground gives the direction, and a missed call can stop a lift mid-swing. These workers work close to moving loads and can lose sight of one another across a spread-out terminal. Voice matters for checking in, but direction signals need to stay visible rather than depend on the next sentence. Voice matters for checking in, but direction signals need to stay visible rather than depend on the next sentence. Crew members may keep gloves on and eyes on the load, so the tool needs large buttons and clear alerts. A crew should compare how each tool passes a signal, how long a signal stays up, who can join, what each person must do to get started, and whether the tool reaches the parts of the terminal where the crew works.

OperatorLink for port terminal workers

OperatorLink is made by the team that publishes this site. It runs in a phone browser, so no app install is needed. ^[1] It passes button presses, chat and voice between phones in a browser. ^[1] STOP releases every held direction on every phone and shows a full-screen alert to everyone else. ^[1] HOLD and SLOW stay on for everyone in the jobsite and are cleared when the last person leaves. ^[1] Holding a move button keeps sending that move to the other phones; if it stops arriving for 2 seconds, they drop it. ^[1] One-tap radio-style calls such as Go Ahead, Copy That and All Clear are sent as chat messages. ^[1] Anyone who joins can take part in a voice call run from the phone browser. ^[1] The person who starts a jobsite shares a link or QR code, and the crew joins from it. ^[1] A jobsite link stops working 12 hours after the first person joins it. ^[1] A jobsite with nobody in it is wiped after 3 idle hours. ^[1] OperatorLink is currently free to use, and no paid plan is built yet. ^[1]

Zello for port terminal workers

Zello Work costs $8.00 per user per month, or $6.80 with an annual subscription. ^[2] Education and non-profit organizations get an additional 10% off annual subscriptions, for 25% total. ^[2] Zello supports payment by wire transfer, ACH, or check besides credit card. ^[2]

Voxer for port terminal workers

Voxer offers a 14-day free trial. ^[7] Voxer's Personal plan is free. ^[3] Beyond those points the facts say little more, so a crane crew should ask Voxer directly what devices it supports and what its paid plans cost per user.

GroupTalk for port terminal workers

GroupTalk offers a free 14-day trial. ^[4] GroupTalk also offers private cloud and on-premises deployment options for organizations that want their own setup. ^[4] GroupTalk is named as the choice of construction companies including NCC, Veidekke, and YIT. ^[9]

Peak PTT for port terminal workers

Peak PTT is push-to-talk radio hardware rather than a phone app. The PTT-84G is priced at $229, with a $19.95 activation fee and $24.95 per month for unlimited push-to-talk, with no contracts. ^[5] PeakPTT is described as having sub-300-millisecond latency, no dead zones, no repeaters, and no FCC licensing. ^[5] Same-business-day shipping is offered on most orders. ^[5]

Matching the tool to the job

A direction that stays until every person registers it suits the worker guiding a crane: OperatorLink keeps STOP, HOLD and SLOW on for everyone until the last person leaves. ^[1] A full-screen STOP alert appears on every phone. ^[1] For a terminal that wants its own servers, GroupTalk offers private cloud and on-premises deployment. ^[4] A short job suits OperatorLink, which shares a link or QR code the crew joins from, and the link works for 12 hours. ^[1]^[1] A worker who already carries a radio can use Peak PTT's hardware, which ships the same business day on most orders with no contracts. ^[5]^[5] Ask each provider how its tool reaches the full area of the terminal before relying on it.

Questions to ask before you choose

Does a direction stay on every screen until each person confirms it, or does it clear the moment a finger lifts? Can a crew member join from a link, or does a manager need to set up accounts and groups first? What happens to a signal when a phone loses connection for a few seconds? On which devices can each person receive the tool, and are they the phones the crew already carries? Is the coverage enough for the parts of the terminal where the crew works, or are there dead spots? Who pays, and is the price per user, per radio, or per month, and does it change on an annual plan? How long does a free trial run, and what must be shared to start one? If a lone worker needs an alarm, does the tool have one, and who does it reach? Can the tool run more than one group at once so the signal crew and the rigging crew do not talk over each other?

Frequently asked questions

Do push-to-talk apps work for crane signals for a port terminal crew on a phone?

A push-to-talk tool carries voice, and some also pass direction signals. OperatorLink shows STOP, HOLD and SLOW to the jobsite crew in a phone browser; HOLD and SLOW stay on until the last person leaves, and STOP releases every held direction with a full-screen alert. ^[1]^[1]^[1] Ask each provider how far its tool reaches on the terminal before relying on one.

Is there a free push-to-talk app for a port terminal crane crew?

Yes. OperatorLink is currently free to use, and no paid plan is built yet. ^[1] Voxer's Personal plan is free. ^[3] GroupTalk offers a free 14-day trial. ^[4] Compare how long a signal stays visible before relying on any free option.

What does Zello cost per month?

Zello Work costs $8.00 per user per month, or $6.80 with an annual subscription. ^[2] Peak PTT charges $24.95 per month per radio for unlimited push-to-talk, on top of a $229 per-radio price and a $19.95 activation fee. ^[8]^[5] OperatorLink is currently free, with no paid plan built yet. ^[1] Voxer and GroupTalk pricing is not published here, so ask them what they charge per user.

Can OperatorLink hold a STOP that everyone on the crew sees?

Some tools keep a direction visible rather than drop it when a finger lifts. OperatorLink keeps STOP, HOLD and SLOW on for everyone in the jobsite and clears them when the last person leaves, and STOP releases every held direction and shows a full-screen alert to everyone else. ^[1]^[1] For other tools, ask how long a direction stays on screen and whether it clears when the person stops holding it.

What device does OperatorLink need?

OperatorLink runs in a phone browser with no app install and can be added to a phone's home screen. ^[1]^[1] Check which devices the rest of the crew already carries, and ask each provider what its tool runs on before the crew relies on it.

OperatorLink is currently free to use, and no paid plan is built yet. ^[1]

Try OperatorLink