---
title: App Model | Qventis One
description: The App Model learns your application's screens, flows, APIs, data and rules once, and every Qventis One engine reuses it. Change it once, fix it everywhere.
---

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[Qventis One](https://qventis.ai/one?hsLang=en)/App Model

# Fix a changed screen once, not in every suite

As the Qventis Engine records and reads your app, the App Model keeps what it learns: screens, flows, APIs, data, roles, rules and the process steps they serve. Every engine reads it, so one approved update fixes every affected test.

[Book a demo](https://qventis.ai/contact#demo)[See Qventis One](https://qventis.ai/one?hsLang=en)

- One model, eight engines
- Fix once, apply everywhere
- Readable targets, no XPath

**App Model: Order management**Shared by every engine

- screenOrder entry
- controlthe 'Save' button
- flowCreate order, approve large orders
- apiPOST /orders
- datadw.fact\_orders on order\_id
- roleSales rep, Approver
- ruleOrders over 10,000 need approval

## Why one model matters

### Fix once

A renamed button or moved field is updated in one place and flows to every test, in every engine.

### See what a change touches

Tests point at model elements mapped to process steps and their expected results, so the impact of a release is a question the model answers.

### Readable by anyone

Targets are labels like the 'Save' button. Never selectors or XPath.

### Context for coding agents

Agents read a governed model instead of re-reading pages on every run.

## How it works

How it learnsFrom what you already have

Shared by every engineOne model, eight engines

Changes you approveUpdates with evidence

### How it learns

The model grows from the recordings, specs, schemas and cases your teams already have.

[See Studio](https://qventis.ai/platform/studio?hsLang=en)

- Record a journey on web, desktop or a terminal, and every control joins the model
- Import OpenAPI, Postman or HAR files for endpoints and contracts
- Connect a database or warehouse for entities, keys and lineage
- Import manual cases and requirements from Jira, Azure DevOps, TestRail or Excel

### Shared by every engine

Each engine reads the part of the model it needs, so a fix in one place reaches all eight.

[See how Qventis One fits together](https://qventis.ai/one?hsLang=en)

| [Functional](https://qventis.ai/engines/functional?hsLang=en) | Screens, controls and flows |
| --- | --- |
| [Performance](https://qventis.ai/engines/performance?hsLang=en) | Journeys replayed as load |
| [Security](https://qventis.ai/engines/security?hsLang=en) | Roles, permissions and endpoints |
| [Virtualization](https://qventis.ai/engines/virtualization?hsLang=en) | API contracts |
| [Test data](https://qventis.ai/engines/test-data?hsLang=en) | Entities and keys |
| [Data & ETL](https://qventis.ai/engines/data-etl?hsLang=en) | Tables and lineage |
| [Visual](https://qventis.ai/engines/visual?hsLang=en) | Screens and documents |
| [Accessibility](https://qventis.ai/engines/accessibility?hsLang=en) | Screens and components |

### Changes you approve

When your app changes, the model proposes an update with before and after. A person approves it once for every engine.

[See Trust & security](https://qventis.ai/platform/trust?hsLang=en)

**Proposed model update**Waiting for approval

The 'Save' button on Order entry moved into a toolbar.

Before  
footer \> the 'Save' button

After  
toolbar \> the 'Save' button

Every affected test, journey and check across engines is listed for review.

Approve updateOnly a person can approve

## See your hardest app modeled live

Bring the application nobody has managed to automate.

[Book a demo](https://qventis.ai/contact#demo)

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