# Sigma Domain — AI chat, audio tours & tools

> AI chat, audio tours & tools (iPhone/iPad app by Sigma Domain.)

- Source: https://appshunter.io/ios/app/sigma-domain/id6751211704 (this page in markdown: same URL + `.md`)
- Developer: [Sigma Domain](https://appshunter.io/developer/1876019749)
- Category: Productivity, Lifestyle
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 16.6 · 59 MB
- Languages: American English
- Released: 2026-02-09
- Data updated: 2026-08-26
- User reviews in markdown: https://appshunter.io/ios/app/sigma-domain/id6751211704/reviews.md

## What is Sigma Domain?

Sigma Domain is the AI workspace where you bring the tools — and the AI does the work.

The conversation is powered by Claude, the model family behind the world's best coding and agent systems. When you want a sanity check, tap the brain button and get a second opinion from a catalog of 70+ leading models — OpenAI, Meta, Mistral, DeepSeek, Amazon, and more — with a summary of where they agree or differ.

YOUR AI TOUR GUIDE
Going somewhere? Start a tour and Sigma Domain narrates the places you pass — the history, the architecture, the stories — spoken aloud while you drive or walk. Road trips, neighborhood walks, museum visits: it's like a private radio station about wherever you are.

POST YOUR OWN TOOLS
Most AI apps are just chat. Sigma Domain includes a marketplace of thousands of ready-to-use tools — and you can register your own functions, APIs, and integrations, public or private. Your tools become part of the AI's toolkit, callable in plain English by you, your team, or anyone you share them with.

LIVE MAPS YOU BUILD TOGETHER
Search properties and places, pin and compare them on a shared map, vote with your team, and generate reports — commute times included.

SKILLS
Expert playbooks the AI loads on demand: create and edit Word documents, PowerPoint decks, Excel spreadsheets, PDFs, and more — so answers become finished documents, not just text.

AI JOBS
Hand off multi-step work. The AI plans the steps, calls the right tools, and reports back when it's done.

WHY SIGMA DOMAIN
- Powered by Claude for the main conversation — the engine behind today's best AI agents
- Second opinions from 70+ models with one tap
- A tool marketplace you can add to — publish your own tools in minutes
- GPS-aware audio tours, live shared maps, document skills, and automated jobs
- Natural conversation — no prompt engineering required

Bring your tools. Ask for outcomes. Sigma Domain does the rest.

Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Standard Monthly Sigma Domain | $5.99 | per month |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Additional Usage - Sigma Domain | $9.99 | one-time |



## Version history (last 5 releases)

### 3.3.42 — 2026-08-16

Bug fixes and performance improvements.

### 3.3.41 — 2026-08-10

The conversation menu no longer covers the whole screen on iPad — it opens as a side drawer so you can still see what you were reading.

Tool activity now says why it is doing something, not just what.

Assorted fixes.

### 3.3.39 — 2026-08-09

Bug fixes and performance improvements.

### 3.3.38 — 2026-08-03

Bug fixes and performance improvements.

### 3.3.35 — 2026-08-01

Bug fixes and performance improvements.

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| --- | --- | --- | --- |
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| [Creative AI Command Prompts](https://appshunter.io/ios/app/creative-ai-command-prompts/id6477546386) | 4.9 (8) | Free | Productivity |
| [SecBrain - AI Voice Memos](https://appshunter.io/ios/app/secbrain-ai-voice-memos/id6466658599) | 2.0 (3) | Free | Productivity |
| [Notever - Writing Notes](https://appshunter.io/ios/app/notever-writing-notes/id6748312345) | — | Free | Productivity |

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-26.*