Voice AI Watch for Field Techs -
Get Answers in 1.5 Seconds.
Built for field service techs running back-to-back calls.
Ask questions, capture job notes, send follow-ups,
and run timers in 1.5s by voice.
Pricing
$49.99
+ $10/month subscription
Built for Hands-On Field Work
When you are moving between crawl spaces, rooftops, panels, and service trucks, every phone unlock slows you down. Hollow gives you answers, notes, and timers in 1.5 seconds so you stay on task.
First Customer
"I stopped pulling out my phone between calls. I ask Hollow, set a timer, and send the recap before I leave the driveway."
- First Hollow customer, HVAC service tech
On-Site Workflows
Troubleshoot Faster
Ask wiring, pressure, part, or install questions on the spot without breaking your workflow.
Send Follow-Ups Before You Drive Off
Dictate customer recap emails and internal updates while details are fresh at the job site.
Capture Notes and Timers Instantly
Log parts needed, callbacks, and set alarms or stopwatches for diagnostics and return visits.
New field workflows arriving weekly.
Next Workflow Unlock In:
Alarms
Featured On
Why Hollow?
Phones and generic smartwatches were not built for field work. Hollow is built for techs who need speed, clarity, and hands-free execution on-site.
Phone + Dispatch Apps
- 8-15 seconds lost every time you unlock, switch apps, and type in the middle of a call
- Hard to use with gloves, tools, ladders, or both hands busy
- You stop the job to capture notes, timers, and follow-up steps
- Task details get missed between calls and callbacks
Other Smartwatches
- Built for fitness and notifications, not service-call workflows
- Limited AI for customer follow-up and field note capture
- Weak support for alarms, stopwatches, and job-specific reminders
- Still sends you back to your phone for real work
Hollow Watch
- 1.5s response time keeps you present and moving through each call
- Ask troubleshooting questions without pausing the job
- Capture notes, parts needed, and next steps by voice on-site
- Send follow-up emails, set alarms, and run stopwatches from your wrist
Built for crews that run on speed, accountability, and clean handoffs.
No app juggling. No phone ritual. Just fast execution on your wrist.
See It In Action
Watch Hollow handle real field-service commands in real-time.
See It In Action
Watch Hollow answer, draft, and capture call notes in real-time.
Technical Specifications
For service owners and technical buyers who want full hardware details
View Full Hardware & Software Specs
Core Components
- MCU: Espressif ESP32-S3 (Dual-core Xtensa LX7, 240MHz)
- Memory: 8MB PSRAM, 16MB Flash
- Display: 1.54" Color TFT LCD (240×240), Capacitive Touch
- Connectivity: Wi-Fi 802.11 b/g/n, Bluetooth 5.0 BLE
- LoRa Module: SX1262 (868MHz/433MHz/915MHz)
Sensors & Peripherals
- Accelerometer: BMA423 3-axis
- Audio: PDM Microphone, MAX98357A Amplifier
- Haptic: DRV2605 Haptic Motor
- RTC: Real-Time Clock
- IR: Infrared Transmitter (S3 Plus variant)
Power & Battery
- Battery: ~400-500mAh LiPo
- Charging: A-USB Charging
- Water Resistance: IP54 (splash-proof)
Platform
- OS: Custom HollowOS (Closed Source)
- Updates: Over-the-air firmware updates
- Focus: Speed and Simplicity
About Hollow
Hollow was built around one question: why should field teams lose momentum every time they need a quick answer or note?
We design for people who work with their hands: field techs, on-site operators, and the service managers supporting them. Hollow stays out of the way and delivers the output you need instantly.
The Hollow 0W is our first step. We are shipping to early teams now, and real field feedback shapes every workflow we launch next.
Stay On Schedule
Across Every Call.
If your team runs service calls all day, Hollow helps you move faster with less admin drag. Get Hollow 0W for $49.99 and keep your phone in your pocket.