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Deltix

Deltix is an AI agent that runs plain-English tasks on an iOS Simulator on your Mac and reports whether a real user could complete them, keeping source code and builds local.

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Introduction

Deltix tests mobile apps by trying user tasks the way a person would. You write a task in plain English, such as “sign up and send your first message”, and its agent attempts it on an iOS Simulator running on your Mac, then tells you whether a real user could complete it. Successful runs can be saved and rerun.

Privacy is central to the design. The agent runs locally against your simulator, and Deltix says it never accesses your source, your build or your signing identities. Screenshots and run records sit in your account for review and replay, can be deleted, and you can bring your own model key.

It is in open beta, supports iOS today and is free with no card or invite needed.

Launch and background: Deltix was posted to Hacker News as a Show HN on 15 August 2026.

Features

  1. Plain-English tasks: Describe a user goal, not steps.
  2. Local agent: Runs against your own iOS Simulator.
  3. Code stays local: No access to source, builds or signing identities.
  4. Replayable runs: Review screenshots and run records.
  5. Bring your own key: Route model traffic through your account.

Pros

  1. Free beta: No card required.

Cons

  1. iOS only for now: Android is not supported yet.
  2. Mac required: Runs against a local simulator.
  3. Beta: Expect changes.
  1. Sign up, verify email and install the small native app.
  2. Start any iOS Simulator and attach the agent.
  3. Write a task and watch the run.

Resources:

Pricing

Deltix is free during its open beta, with no card or invite needed.

  1. iOS developers who want quick usability-style checks.
  2. Privacy-conscious teams that cannot upload builds.

Conclusion

Deltix is a simple, local-first way to ask whether a user can finish a task in your iOS app.

Keep an eye on its Android plans if you ship on both platforms.

On CheckOps, Deltix is filed under the End-to-end & functional stage. Related tools listed here include Maestro, XCUITest, Revyl, Drizz, MobileBoost (GPT Driver) and Arbigent. Which one fits best depends mostly on your stack, your team’s size and skills, and whether you prefer to run tools yourself or pay for a managed service. This page reflects the official website, documentation and repository as they stood on 11 November 2026.

Alternatives

Other tools on CheckOps that cover similar ground. Open a page, or compare one with Deltix side by side.