ERMIS vs Open Agent
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ERMIS
This app provides a mobile interface to control your self-hosted AI agent. Manage complex workflows, research topics, draft content, and solve coding problems remotely. Your data remains on your instance for enhanced privacy and control.
- Connect to your Hermes Agent instance
- Research topics and summarize
- Write, edit, and generate content
- Assist with coding and debugging
- Plan tasks and organize workflows
- Remote agent management
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ERMIS is your mobile control center for a hosted Hermes AI agent. Instead of using another basic chatbot, Hermes AI lets you connect to your own Hermes Agent instance and manage AI workflows from your phone. Research topics, draft content, solve coding problems, organize projects, and work through multi-step tasks with an agent built for real work. WHAT HERMES AI CAN DO • Connect to your own Hermes Agent instance • Research topics and summarize results • Write, edit, and generate ready-to-use content • Help with coding, debugging, and problem solving • Plan tasks and organize next steps • Support complex multi-step workflows • Manage your AI agent from your phone CONTROL YOUR AI AGENT FROM ANYWHERE Hermes AI gives you a simple mobile interface for working with your own AI agent setup. Set up your Hermes Agent instance, connect securely, and use Hermes AI as a mobile command center for research, writing, coding, planning, and task management. • Access your agent remotely • Manage ongoing tasks from your phone • Keep control over your AI setup • Work with a self-hosted agent environment • Stay productive without being tied to your desk YOUR DATA STAYS ON YOUR INSTANCE Hermes AI connects to your own Hermes Agent instance. Your AI work runs on the infrastructure you choose, so your prompts, tasks, and workflows are handled by your own setup instead of being processed through our servers. No shared chatbot workspace. No mining your conversations. Your agent, your environment, your control. POWERED BY HERMES AGENT Hermes AI is designed to work with Hermes Agent, the open-source autonomous agent framework from Nous Research. It gives developers, builders, researchers, and power users a mobile way to interact with an AI agent that can plan, reason, use tools, and help complete real work. BUILT FOR PEOPLE WHO WANT MORE THAN CHAT Use Hermes AI for: • Research and summaries • Writing and editing • Coding help • Productivity and planning • Task execution • Brainstorming and problem solving • Multi-step workflows • Remote access to your AI agent PERFECT FOR • Developers and builders • Power users • Researchers and students • Creators and writers • Privacy-conscious users • People who prefer self-hosted tools • Anyone who wants AI that helps get work done Hermes AI turns your phone into a remote for your own AI agent. Ask once. Get it done with Hermes AI. Policies Privacy Policy: https://www.notion.so/Hermes-AI-Privacy-Policy-30b8e2a74aa4807db3a2c0972544b96b Terms of Use: https://www.notion.so/Hermes-AI-Terms-of-Service-30c8e2a74aa480bbb295ec0cc2c878a1
Open Agent
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Open Agent gives you a private Hermes Agent on your phone. Create your agent, open its Convos group, and start chatting. No terminal, no server setup, no Docker, and no MacBook running 24/7. Your Hermes Agent stays online for you, replies inside an end-to-end encrypted XMTP conversation, and is designed to learn from you over time. Teach it preferences, context, and tasks through natural chat. Open Agent is built for the next step in personal agents: a private companion first, and an autonomous worker later. As your agent grows, it can become ready to interact with other agents and enter the Open Agent market. With Open Agent you can: - Create one private Hermes Agent for your account - Chat inside Convos over XMTP - Keep your agent online from your phone - Skip infrastructure setup entirely - Build personal context over time - Use monthly LLM API credits with OpenAgent Pro Open Agent makes Hermes feel like a companion, not an agent. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is iOS requirement: ERMIS at 17.0 against Open Agent's 26.0. On price, update cadence, ads and in-app purchases there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. ERMIS sells 2 in-app purchases, starting at $19.99 per month and Open Agent sells 2 in-app purchases, starting at $4.99 per 7 days. Whichever you choose, the download price is not the number that matters.
ERMIS ships an update every 5 days, Open Agent every 9 days. The most recent releases landed on October 20, 2026 and October 1, 2026 respectively.
| Parameter | ERMIS | Open Agent |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (4 ratings) — better | — |
| Positive reviews | 50.0% of reviews | — |
| Number of ratings | 4 — better | — |
| Update frequency | Every 5 days — better | Every 9 days |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone | iPhone, iPad — better |
| Requires iOS | 17.0 — better | 26.0 |
| Further details — not scored | ||
| Size | 15 MB | 101 MB |
| Age rating | 4+ | 17+ |
| Developer | Ilya Vishneuski | Hoang Nguyen Vu |
In-app purchases
ERMIS
- Premium3 Days trial$19.991 Month
- Premium3 Days trial$199.991 Year
Open Agent
- OpenAgent Pro Weekly$4.997 Days
- OpenAgent Pro Yearly3 Days trial$99.991 Year






