Hardware requirements

Overview

Klu POS is iPad-only, landscape-only, and depends on a small set of supported peripherals for full functionality. Running on unsupported hardware may technically launch the app, but printing, weighing, and cash drawer control will not work correctly.

Device

iPad — any current iPad Pro, iPad Air, or standard iPad. Not supported: iPhone, iPod, or the original iPad mini (1st gen).
iOS 13.4 or later is required.
The app is locked to landscape orientation.
Wi-Fi 802.11ac or newer is recommended for stable printer and scale connections; cellular is supported on cellular-enabled iPads as a backup.

Printer

Star IO10 (Star Micronics) thermal receipt printer with 7.2cm paper — the officially supported printer.
Compatible ESC/POS BLE printers also work, but layout quirks and cash drawer control may differ — test thoroughly before rolling out.
The Star printer has an integrated cash drawer kick-out port. Required if you want the drawer to auto-open on cash sales — Klu sends the kick command through the printer, not directly to the drawer.

Scale

Bluetooth Low Energy (BLE) scales only. Older Bluetooth Classic scales are not supported.
The scale must broadcast weight over the standard weight measurement characteristic UUID so Klu's scale manager can decode it.
For the current list of tested scale brands and models, check with the Klu team — the compatibility list is updated as new hardware is verified.

Network

Outbound HTTPS (port 443) access to Klu's API — required for sales sync, customer lookup, and all server-backed features. Contact the Klu team if your network needs specific hostnames allow-listed.
Camera permission — for QR pairing and product barcode scanning.
Bluetooth permission — for printer and scale discovery and connection.
Location permission — some iOS versions require location access for BLE scanning. Grant it if prompted; Klu does not use or store the location data itself.

Limits

One paired branch per iPad — to serve a second branch from the same device, unpair and re-pair.
One active shift per device at a time.
One active printer and one active scale at a time.