DDx Host

Describe the problem and mark what you've already checked. DDx Host ranks the possible causes by probability and suggests what to check next.

DDx Host window: cause probabilities after observations and chat with the AI assistant

What it's for

Works for any task where you need to find a cause: symptoms of an illness, a broken device or machine, a network or process failure. Instead of guessing, you get a list of causes that updates after every check.

How it works

  1. 01

    Decomposition

    Split the object into units and parts, yourself or with AI.

  2. 02

    Properties

    Write down the properties: what is happening and what isn't working right.

  3. 03

    Causes

    Add the possible causes and their starting probability. AI can take it from failure statistics.

  4. 04

    Observations

    Mark which properties were confirmed.

  5. 05

    Recalculation

    The causes re-sort right away, and the app suggests what to check next.

  6. 06

    Report

    A diagnostic report or your own template: print to PDF or share a QR link.

Features

More features

Download

Android

For phones and tablets

Questions and answers

What is DDx?

Short for differential diagnosis: finding the most likely cause among several possible ones.

Do I need the internet?

Yes. Calculation, AI and project storage run on the OmExpert server.

Where are projects stored?

In the OmExpert cloud, in your account. How many projects you can keep depends on your plan. Any project can be exported to a file.

How do I move a project between desktop and phone?

Nothing to move: sign in to the same account and your projects are there.

Can I work without AI?

Yes. Properties, causes and probabilities can be entered by hand; the calculation does not depend on AI.

How do I sign in?

With Google or Yandex ID; the site and the app share the same account.

What happens after the trial?

After 3 days, choose a plan: Plus, Pro or Expert.

Current version

  • Cause ranking and next-check hints
  • AI fills in the project
  • Links between properties
  • What-if scenarios
  • Report builder and QR link
  • Project cloud
  • Windows and Android

Sign in to OmExpert

One account for the website and the DDx Host app.

Your account is created on first sign-in. 3 days free, no card.

Yandex ID

Choose a plan

3 days free, no card

Plus

$5/mo

  • Up to 100 projects
  • Core app features
  • Windows and Android

Pro Recommended

$12/mo

  • Up to 1,000 projects
  • Everything in Plus
  • Python script support
  • Language AI model

Expert

$65/mo

  • More than 1,000 projects
  • Everything in Pro
  • A more powerful and smarter AI model

Payment is in US dollars. Prices in other currencies are approximate, at the current rate.