Comparison

Sigma Domain vs OpenAgents Mobile

Price, ratings, monetisation and update history for both apps, side by side โ€” with what reviewers say about each.

Head to head
About

Sigma Domain

Features
Read full description

Sigma Domain is the AI workspace where you bring the tools โ€” 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 โ€” OpenAI, Meta, Mistral, DeepSeek, Amazon, and more โ€” 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 โ€” the history, the architecture, the stories โ€” 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 โ€” 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 โ€” commute times included. SKILLS Expert playbooks the AI loads on demand: create and edit Word documents, PowerPoint decks, Excel spreadsheets, PDFs, and more โ€” 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 โ€” the engine behind today's best AI agents - Second opinions from 70+ models with one tap - A tool marketplace you can add to โ€” publish your own tools in minutes - GPS-aware audio tours, live shared maps, document skills, and automated jobs - Natural conversation โ€” 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/

About

OpenAgents Mobile

Read full description

OpenAgents Mobile brings your team and your AI agents into a single shared workspace. Start a thread, bring in the agents you need, and let them do the work alongside you โ€” researching, tracking orders, comparing quotes, drafting updates. Everything happens in the same conversation your team is already in. WHAT YOU CAN DO โ€ข One workspace for people and agents Talk to teammates and AI agents in the same threads. No switching apps, no copying context back and forth. โ€ข Assign work and follow through Hand a task to an agent or a teammate, then watch progress update in the thread. Results land where the discussion happened. โ€ข Organize by project Keep threads, files, and agents grouped by the project they belong to, so context stays where it belongs. โ€ข Scheduled routines Set an agent to run on a schedule โ€” a morning check, a daily report, a recurring review โ€” and get the results waiting for you. โ€ข Files in context Share documents and images in a thread and let agents work directly with them. โ€ข Built-in browser view Watch what an agent is browsing in real time, right inside the app. โ€ข Roles and permissions Control who can see what and which agents can act, with team roles built for real organizations. Sign in with email, Google, or Apple to reach your workspace from anywhere.

Screenshots

Sigma Domain4 screens
OpenAgents Mobile4 screens

Verdict

The call

The clearest difference is in-app purchases: OpenAgents Mobile at none against Sigma Domain's 2. Sigma Domain's advantage is update cadence (every 2 days vs every 3 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Sigma Domain sells 2 in-app purchases, starting at $5.99 per month. OpenAgents Mobile asks for nothing beyond the download.

UpkeepUpdate frequency

Sigma Domain ships an update every 2 days, OpenAgents Mobile every 3 weeks. The most recent releases landed on October 28, 2026 and October 29, 2026 respectively.

Scorecard2 real differences ยท 4 level
Sigma Domain versus OpenAgents Mobile: the parameters behind the verdict, then further details
ParameterSigma DomainOpenAgents Mobile
PriceFreeFree
Update frequencyEvery 2 days โ€” betterEvery 3 weeks
AdsNoNo
In-app purchasesYesNo โ€” better
DevicesiPhone, iPadiPhone, iPod
Requires iOS16.615.0 โ€” better
Further details โ€” not scored
Size73 MB34 MB
Age rating4+17+
DeveloperSigma DomainZHONGYUAN ZHU

In-app purchases

2 purchases

Sigma Domain

Subscriptions1
  • Standard Monthly Sigma Domain$5.991 Month
One-time1
  • Additional Usage - Sigma Domain$9.99
None

OpenAgents Mobile

No in-app purchases

Questions

Is Sigma Domain free?
Sigma Domain is free to download, with in-app purchases available.
Is OpenAgents Mobile free?
OpenAgents Mobile is free to download, with no in-app purchases.
Do Sigma Domain or OpenAgents Mobile have ads?
Neither Sigma Domain nor OpenAgents Mobile shows ads.
Which is updated more often, Sigma Domain or OpenAgents Mobile?
Sigma Domain ships an update every 2 days, and OpenAgents Mobile every 3 weeks. Most recently, Sigma Domain was updated on October 28, 2026 and OpenAgents Mobile on October 29, 2026.

Other comparisons