Retail & Hospitality
Local restaurant POS + kitchen display
Order-taking and kitchen display running on-site. No internet needed to take an order, no per-terminal fee.
Replaces: Toast / Petpooja
Stop renting software.Own the box.
Standalone devices that do the job of subscription tools locally. Pay once, no monthly bill, no cloud dependency.
₹0 /moafter you own it
48 × 28 mmboard with charger built in
1×payment, forever
DATA STAYS LOCAL
✓ Pay once, use for years
✓ Works offline
✓ No cloud subscription
✓ Your data stays on the device
✓ Built in-house: PCB → SMT → firmware
monitoringdashboardsalertscountersattendanceinventoryloggingautomationlocal data collectioncontrol systemssmall business tools
monitoringdashboardsalertscountersattendanceinventoryloggingautomationlocal data collectioncontrol systemssmall business tools
Software you rent. Hardware you own.
Lots of tools do simple, repetitive jobs: watch a sensor, count something, show a number, log an event. Those jobs can run on a box sitting next to you instead of a server billing you monthly.
Use software when software makes sense. Own hardware when the job does not need a subscription. That is the whole idea, nothing ideological about it.
How every CktHub product is made
From a monthly SaaS to a box you own.
We strip the tool down to the one job you actually rely on, then move that job onto hardware in your building. No cloud round-trip needed for it to work.
01
Monthly SaaS
You pay every month for a tool that does one job: monitoring, attendance, inventory, a dashboard, an alert.
02
Find the useful function
Strip the tool down to the actual job you rely on. Ignore the platform features you never open.
03
Run it locally
Move that job onto hardware in your building, with no cloud round-trip for it to work.
04
One box, one job
An ESP32 or ESP32-S3 core with the exact sensors, display and I/O the job needs.
05
Pay once
One payment. The firmware is flashed in, nothing to license, nothing to renew.
06
Own it
It keeps working offline, your data stays local, and the monthly invoice stops.
Rent software or own the hardware?
For certain jobs, hardware ownership makes more economic and practical sense than a subscription. Here is the honest comparison.
Factor
Subscription software
CktHub hardware
Initial cost
Low entry
One-time purchase
Monthly fee
Yes
No
Internet dependency
Often
Designed for local operation
Data
Cloud dependent
Device / local
Ownership
Software access
Physical device
Long-term cost
Recurring
One-time hardware purchase
We are not against software, we build with it every day. This table just shows where a monthly bill stops making sense for a job a box can do.
Do the math yourself
What one device saves you.
Pick the job you pay for today. One device replaces that monthly line, and the device is yours to keep. The number below is what stays in your pocket over 5 years.
Device price below is an estimate. The exact quote comes on WhatsApp, and it is one-time. No renewal, no per-seat fee, no cloud tier.
Today₹1,200 /mo
→
After the device₹0 /mo
Kept in your pocket, 5 years
₹63,001
vs ₹72,000 in subscriptions, after ₹8,999 one-time
I want this device
₹1,200 × 12 × 5 years, minus one-time device cost
Hardware that does the job.
Standalone boxes that take over the work of familiar subscription tools. Local data, no monthly fee. Working on one? Tell us, it moves up the build queue.
Retail & Hospitality
Review collection kiosk
Countertop kiosk that captures reviews locally and syncs on your schedule, not theirs.
Replaces: Google Review SaaS widgets
Retail & Hospitality
Offline-first booking kiosk
Appointment scheduling that keeps taking bookings even when your connection drops.
Replaces: Calendly / Square Appointments
Retail & Hospitality
Digital signage / price display
Menu boards and price displays driven from a local controller, not a cloud CMS with a monthly seat price.
Replaces: Yodeck / ScreenCloud
Facilities & Access
Attendance check-in kiosk
Badge in or clock in on a wall unit, logged on-site, no per-seat licensing.
Replaces: Zenefits / Deputy
Facilities & Access
NFC / QR access control panel
Door and gate access on a standalone panel, no monthly per-door platform fee.
Replaces: Kisi / Brivo
Facilities & Access
Visitor management + badge unit
Front-desk check-in and badge printing that runs whether or not the cloud is up.
Replaces: Envoy / iLobby
Industrial / IoT
Inventory / asset tracker
Scan-and-log tracking for tools and stock, stored locally, exported when you want.
Replaces: Sortly
Industrial / IoT
Local data logger
Plant-floor logging and display on hardware you own, not a per-tag cloud subscription.
Replaces: Cloud SCADA / monitoring subscriptions
Industrial / IoT
Predictive maintenance logger
Vibration and temperature logging on-machine, alerting locally before failure.
Replaces: Augury / Fluke Connect
Industrial / IoT
Modbus / MQTT gateway
Protocol bridging on-premise, so machine data never has to leave the building.
Replaces: Cloud IIoT platforms
Smart Home
Local DNS ad-blocker box
Network-wide ad blocking that runs on your LAN, with nothing phoning home.
Replaces: Cloud DNS / ad-block services
Smart Home
Local-only switch hub
Smart switching that keeps working with no app account and no premium tier.
Replaces: Subscription smart-home apps
Smart Home
Local automation hub
A local hub for the automations you already run, with no cloud hub subscription.
Replaces: SmartThings / cloud hub subscriptions
Smart Home
Doorbell / camera, on-device storage
Video stored on the device itself, no cloud storage plan required to review footage.
Replaces: Ring / Nest cloud video
Productivity
Desk task / habit tracker
A dedicated desk device for tracking tasks and habits, off your phone, off the cloud.
Replaces: Notion / Todoist subscriptions
Productivity
Standalone alert / watchdog unit
Watches one thing, temperature, power, a machine, and alerts you locally when it changes.
Replaces: Uptime / alerting SaaS
Want to buy something today? Boards, adapters and accessories are in stock now.
In stock now.
Finished boards, ready to ship from Pune. One-time price. Same boards we use in our own products.
ESP32-WROVER-DevKit-Lipo
₹799 incl. taxes
Dev kit with ESP32-WROVER module, 1.8″ TFT display and integrated battery charger.
4 MB flash8 MB PSRAMLiPo charger
× 1
ESP32-S3-DevKitC-1
₹499 incl. taxes
S3 module dev kit, Wi-Fi + BLE and a 1.8″ TFT display. Built for on-device AI and voice.
8 MB flash8 MB PSRAMNative USB
× 1
Product doesn’t exist yet? Perfect.
Start your build
We build it: PCB design, SMT assembly, firmware, enclosure.
Tell us the job you pay a subscription for and we will quote a device that replaces it. One-time cost, you own the design and the box.
You paid for software all these years. Now own the box.
0monthly bills
1×payment, forever
100%data on your premises
∞years of use
Why CktHub
Real questions, answered plainly.
Why are you doing this?
Because most simple tools are already subscription software. We build the hardware that does the same job without the recurring bill.
Do you make devices that replace SaaS?
Yes. We design purpose-built boxes that take over the work of subscription tools, and the firmware runs on the device itself, no cloud required.
How can I buy a device?
Store orders for the boards on this page. For a custom device, tell us the job, we will quote you a one-time price.
Who makes the products?
We do. PCB design, SMT assembly and firmware are done in-house by Ambivert Technologies Pvt Ltd.
Who is this for?
People who run a business and people who build things. Shopkeepers, makers, engineers, tinkerers, facility managers.
Do you offer support?
Yes, on WhatsApp. We help you wire it, flash it, and get the job running.
Let’s talk.
Tell us the job you pay a subscription for, or the product you want built. We reply on WhatsApp.