Offline-first technical suite

The fault will not wait for the manual.

IndexOS puts guided diagnostics, fault codes, diagrams, and field tools into four vertical apps. Open it, search it, fix it. Even with no signal.

Free version available 350+ manufacturer codes 100% offline EUR 4.90/month New: IndexOS Azienda
4 vertical apps 147 diagnostic checks 350+ manufacturer codes EUR 49.00/year for all apps 100% offline-first
Portfolio

Four vertical apps, one method

Each app is built for a specific trade. Download the free version, use it on the job, and upgrade to Pro when you need the full library.

ElectraIQ Try free

ElectraIQ

Panels, drives, PLCs, sensors, and industrial networks.

154 manufacturer codes513 guided steps22 SVG diagrams
HorecaIQ Try free

HorecaIQ

Ovens, warewashing, refrigeration, and professional kitchens.

56 manufacturer codes207 guided steps16 SVG diagrams
HVACIQ Try free

HVACIQ

Air conditioning, boilers, VRF, heat pumps, and AHUs.

87 manufacturer codes6 domainsReference cards
BASIQ Try free

BASIQ

Building automation, security, access control, and KNX.

85 manufacturer codes7 domainsReference cards
Comparison

Free vs Pro

The free version is usable in real fieldwork. Pro unlocks the full library for technicians who work on site every day.

Free

  • 3 core domains per app
  • 71 diagnosable faults
  • 5 SVG diagrams per app
  • Full technical tools
  • 100% offline
  • 193 faults and 350+ manufacturer codes
  • 78 interactive SVG diagrams
  • Manufacturer reference cards

Pro: EUR 4.90/month or EUR 49.00/year

  • All domains across the 4 apps
  • 193 faults · 350+ manufacturer codes
  • 78 interactive SVG diagrams
  • Manufacturer reference cards
  • Full technical tools
  • 100% offline
  • 1,201 guided diagnostic steps
  • 12 months of updates included
Explore

Inside each handbook

A closer look at the four vertical apps, their covered domains, failure types, and leading brands.

ElectraIQ - Industrial automation handbook

ElectraIQ

Industrial automation
Try free →

Decision trees

Step-by-step guided troubleshooting: every choice leads you to the most likely cause and the right fix.

Fault code mapping

Enter F30001, OC1, A0503: you immediately get the probable cause and corrective action.

Manufacturer cards

Key parameters, fault reset procedures, and diagnostic LEDs for Sinamics, ABB, Schneider, Danfoss, and more.

Interactive SVG diagrams

22 zoomable electrical diagrams for PLCs, motors, sensors, buses, and PV systems. Fullscreen on mobile.

Technical tools

4-20mA, 0-10V, PT100, motor current, winding imbalance. Fully offline.

Bilingual

Complete Italian and English coverage. Fault codes are universal, so the same content works anywhere.

SiemensABBSchneiderDanfossOmronMitsubishiSEWLenzePilzSickIFMEndress+HauserHuaweiSMA
HorecaIQ - Professional kitchens handbook

HorecaIQ

Professional kitchens
Try free →

Combi ovens

Probes, steam, limescale, fans, heating elements. Rational, Unox, Lainox, Electrolux, and more.

Refrigeration

Cold rooms, blast chillers, ice machines, compressors. Scotsman, Irinox, Coldline, Zanotti.

Dishwashers

Hood-type, conveyor, and glasswashers. Winterhalter, Hobart, Comenda, Meiko, Dihr.

Espresso machines

Boilers, groups, pumps, grinders. La Cimbali, La Marzocco, Faema, Nuova Simonelli.

Gas systems and hoods

Burners, thermocouples, gas valves, extraction, compensation, and fire safety.

207 guided steps

Real error codes for Rational, Winterhalter, La Cimbali, Scotsman, Unox, Hobart, and Irinox.

RationalWinterhalterLa CimbaliScotsmanElectroluxUnoxHobartIrinoxLa MarzoccoFaemaMarenoHalton
HVACIQ - HVAC and heating handbook

HVACIQ

HVAC and heating
Try free →

Single-split and multi-split

Inverters, refrigerant charge, probes, control boards. Daikin, Mitsubishi, LG, Samsung, Fujitsu, and more.

Condensing boilers

Ignition, water pressure, flue faults, pumps. Viessmann, Vaillant, Bosch, Immergas, Beretta, Baxi.

Heat pumps

Defrost, reversing valves, low pressure, outdoor coils. Air-to-air and air-to-water systems.

VRV/VRF and chillers

Variable refrigerant flow systems, chillers, cold rooms. Carrier, Trane, Climaveneta.

AHUs and ventilation

Filters, belts, humidifiers, dampers, coils. Full air handling units covered.

87 manufacturer codes

Real error codes for 12 HVAC manufacturers with probable cause and immediate action.

DaikinMitsubishi ElectricLGSamsungFujitsuViessmannVaillantBoschImmergasBerettaBaxiCarrierTrane
BASIQ - Building automation handbook

BASIQ

Building automation and security
Try free →

Intrusion systems

Control panels, PIR sensors, keypads, sirens, communicators. Bosch, DSC, Honeywell, Risco.

Video surveillance

IP cameras, NVRs, DVRs, storage, networking. Hikvision, Dahua, Axis.

Access control

Badge readers, turnstiles, electric locks, door timeouts. HID, Paxton, Fermax.

Fire alarm

Smoke and heat detectors, control panels, fire brigade communication. Notifier, Bosch.

Gates and automation

Motors, photocells, remote controls, limit switches, barriers. Nice, Came, Faac, BFT.

Lighting and shutters

DALI, KNX, presence sensors, dimmers, shutter motors. ABB, Schneider, Siemens.

Bosch SecurityDSCHoneywellHikvisionDahuaAxisNiceCameFaacBFTNotifierRisco
Pricing

Upgrade to Pro when you're ready

Fixed subscription: one monthly or annual price for all apps.

ElectraIQ

ElectraIQ

Included in subscription
  • All domains
  • 154 manufacturer codes
  • 513 guided steps
  • 22 SVG diagrams
  • 12 manufacturer cards
  • 12 months of updates
HorecaIQ

HorecaIQ

Included in subscription
  • All domains
  • 56 manufacturer codes
  • 207 guided steps
  • 16 SVG diagrams
  • 16 manufacturer cards
  • 12 months of updates
HVACIQ

HVACIQ

Included in subscription
  • All domains
  • 87 manufacturer codes
  • 6 full HVAC domains
  • Reference cards
  • Italian + English
  • 12 months of updates
BASIQ

BASIQ

Included in subscription
  • All domains
  • 85 manufacturer codes
  • 7 BAS domains
  • Reference cards
  • Italian + English
  • 12 months of updates
EUR 4.90 /month

Cancel anytime · Secure Stripe payment · 14-day guarantee

New

IndexOS Azienda: the field walks into your office

A Windows desktop console that collects what your technicians do in the field: voice notes, photos, notes and completed diagnoses from the four apps, organized by intervention. AI assistant included, and the handbooks searchable right from the office PC.

📥

Everything that comes from the field

Voice notes, photos, notes and completed diagnoses arrive on their own and get organized by intervention: customer, site, equipment and the full timeline.

🤝

Technicians paired with a QR

Each phone pairs with a single-use QR code. Revocation is instant: no shared accounts, no passwords lying around.

📚

Handbooks in the office too

Error codes, fault cards and probable causes from all four apps, searchable from the PC: the office answers without waiting for the technician.

🔐

Your data stays yours

Archive on your own PC, end-to-end encrypted transport, full backup whenever you want. JSON and CSV export toward the software you already use.

Pro of all four apps included for your technicians Up to 10 paired devices Windows 10 and 11 AI assistant included
EUR 24.90 /month or EUR 249.90/year (2 months free)

Closed beta: the first companies try it free · price locked for the first 10 companies

Ask to join the beta
For technicians

Employed technician? Bring IndexOS to your company

When your company buys IndexOS Azienda, the Pro version of all four apps is free for you and your coworkers: no personal subscription, every content unlocked on the phone you use in the field.

📣

1. Forward the presentation

We prepared a short page for the decision maker: open it below and forward it. If you prefer, write to us and we'll send it to you.

🏢

2. Your company activates

The company activates IndexOS Azienda and pairs your phone with a QR code — no accounts, no passwords.

🎁

3. Pro is yours, free

Full domains, all manufacturer codes and unlimited AI assistant: included for as long as the company stays active.

Open the presentation to forward Or write to us

If your company doesn't buy, your personal subscription keeps working as always.

Download

Apps ready for Android, iOS, and browser use

Fixed monthly plan: EUR 4.90 for all apps. Fixed annual plan: EUR 49.00. No per-app pricing.

1

Google Play Store

IndexOS is available on Google Play: download it and you're ready on Android phones and tablets.

Get it on Google Play Available now
3

App Store

IndexOS is available on the App Store: download it and you're ready on iPhone and iPad.

Download on the App Store Available now
Frequently Asked Questions

Common questions

Download the app, open the link, and start using real free content right away: 3 core domains per app, 71 diagnosable faults, 5 SVG diagrams per app, and all the technical tools. It works offline with no registration. When you need the full library, you can upgrade with one click.
Right after payment you are redirected to a page with the links to your apps. You also receive an email with the same links. Open the link on your device and the app is ready. No app store download required.
No. Every app is independent. You can use just one for free or upgrade only the ones you need. With an IndexOS subscription you get access to all 4 apps for EUR 4.90/month or EUR 49.00/year.
Yes. Fixed monthly plan EUR 4.90 for all apps, or fixed annual plan EUR 49.00. Cancel anytime.
Yes. All apps are offline-first PWAs. Content, diagrams, tools, and manufacturer cards work without a connection. Ideal for plants, kitchens, boiler rooms, and technical spaces without wifi.
You can open the link on any device: smartphone, tablet, or desktop. The app installs like a home-screen icon and keeps working offline on each device.
ElectraIQ: Siemens, ABB, Schneider, Danfoss, Omron and more. HorecaIQ: Rational, Winterhalter, La Cimbali, Rancilio, Victoria Arduino, Egro, Embraco, Scotsman and more. HVACIQ: Daikin, Mitsubishi, LG, Samsung, Viessmann, Vaillant, Bosch and more. BASIQ: Bosch Security, DSC, Honeywell, Hikvision, Nice, Came, Faac and more.
The free version is the trial: you use it in the field with real content. If you upgrade to Pro and it does not fit your workflow, you have a 14-day money-back guarantee. Write to info@indexos.it.
It is the console for the company office PC: technicians send voice notes, photos and diagnoses from the apps and everything lands in the office, already organized by intervention, with an AI assistant included and the handbooks searchable from the PC. It costs EUR 24.90/month or EUR 249.90/year, with Pro included for the company's technicians and up to 10 devices. The beta is closed: the first companies try it for free. Write to info@indexos.it to take part.
No. The package includes the Pro version for the company's technicians: once your phone is paired with the console, Pro is active with no personal fee. If your company doesn't buy, you can still use the free version or subscribe on your own as always.

Ready to speed up
your diagnostics?

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