Deltix

Deltix is an AI-powered mobile app testing tool currently in open beta, focused on iOS simulators. It lets developers and product teams describe user tasks in plain English and then watches an AI agent attempt those tasks on a simulator running locally on a Mac — no source code access, no cloud build uploads required.

What It Is

Deltix sits at the intersection of exploratory testing and regression testing for mobile apps. Instead of writing XCUITest assertions or maintaining brittle UI test scripts, you describe what a real user would try to do — like "sign up and send your first message" — and the agent navigates the app, captures screenshots at every step, and reports where it succeeded or got stuck. The core primitive is a single AI agent attempting a user task, surfaced through three distinct modes.

Three Modes: Task, Playbook, and Experiment

Everything in Deltix is built on one concept — an AI agent attempting a user task — expressed in three ways:

• Task (Try once): Ad-hoc exploration. Write a task, watch the agent try it, and read a screenshot-backed report of where it got stuck. Useful when building a new flow and wanting immediate feedback without scheduling a research session.
• Playbook (Save and replay): Take any successful run and save it as a deterministic playbook. Replay it against every new build from the dashboard for a pass/fail result in seconds, with no flaky assertions to maintain.
• Experiment (Compare two builds): Run the same task against two builds side by side to see which design a user can actually complete before committing to A/B testing in production.

Privacy and Local Execution Model

The agent runs locally on the developer's Mac against an iOS Simulator. Deltix states it never accesses source code, build artifacts, or signing identities. During a run, the agent acts on what it sees on screen — screenshots and run records are stored in the user's account for review and replay, and can be deleted at any time. Users can also bring their own model key to route inference traffic independently.

Setup Path

Getting started involves four steps: creating a free account (no credit card, no invite required), installing a small native Mac Agent app, connecting any already-running iOS Simulator, and writing a first task in plain English. The Mac Agent is the only one-time setup step.

Current Status and Roadmap

Deltix is in open beta as of 2026, with iOS simulator support available today. The team has publicly listed upcoming work:

• In progress: Physical device support (real iPhone attached to Mac)
• Next: Android emulator support
• Next: CLI for CI integration with GitHub Actions, GitLab, and CircleCI
• Later: Hybrid app support for React Native and Flutter

The open beta is free with no credit card required, and users can use the built-in model or supply their own key.