ERMIS vs Sigmy
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ERMIS
Control your self-hosted AI agent from your phone. Manage complex workflows, research topics, draft content, and solve coding problems with a secure, private mobile interface. Ideal for developers and power users seeking advanced AI capabilities beyond basic chatbots.
- Connect to your own Hermes Agent instance
- Manage AI workflows remotely
- Research topics and summarize results
- Draft and edit content
- Assist with coding and debugging
- Organize projects and tasks
Read full descriptionHide full description
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
Sigmy
Read full descriptionHide full description
Sigmy is a fully on-device AI assistant. The language model, document search, and every piece of private text stay on your iPhone or iPad. No cloud. No account. No tracking. No training on your data. Ever. WHY SIGMY IS DIFFERENT • Runs a Google Gemma model locally on your device — no API keys, no subscriptions to external AI services, and no network round-trips that can leak your content. • Works offline, on a plane, in a tunnel, or in a sensitive workplace where cloud AI is banned. • Your documents, chats, and questions never leave your device. We cannot read them and neither can anyone else. WHAT YOU CAN DO • Ask questions about your PDFs, Word docs, text files, Markdown, and scanned images — every answer cites a tappable source passage. • Import documents by tapping +, scanning with the camera, capturing text from photos, pasting images, or sharing from any other app. • Compare two or more documents side-by-side — "what's different between these contracts?", "which proposal has better terms?". • See comparison answers as clean tables when the model formats them that way. • Tap suggested follow-up questions after each answer to dig deeper with one tap. • Extract events from any document straight to your Calendar — meeting dates, deadlines, travel itineraries. • Hands-free mode: have Sigmy read answers aloud in your choice of voice — fully on-device. • Dictate questions by voice and export chats as PDF, Markdown, plain text, RTF, or email. • Search your chat history to find past conversations instantly. • Full-text search across every document you've imported, with semantic ranking that understands what you meant. • Quick-prompt templates for executive summaries, action items, study outlines, and timelines. PRIVACY BY DESIGN • Optional Face ID / Touch ID unlock for the whole app. • Optional AES-GCM encryption of the document index at rest, sealed whenever you background the app. • Privacy manifest declares every iOS API we touch and why. • PII detection warns you before indexing credit card numbers or other sensitive identifiers. FREE TRIAL — 7 DAYS OF EVERYTHING Every new install gets a 7-day free trial with full Pro features: unlimited documents, extended memory window, and all advanced tools. No credit card required. SIGMY PRO After the trial, Sigmy Pro unlocks: • Unlimited document imports and queries • Extended memory window for long files • All advanced tools and future Pro features at no extra cost THREE WAYS TO SUBSCRIBE • Pro Monthly — $5.99/month after a 7-day free trial • Pro Yearly — $39.99/year after a 14-day free trial (saves ~50% vs monthly) • Lifetime Pro — one-time $79.99, permanent access, no renewals SUPPORTED DOCUMENT TYPES PDF, Word (.docx), plain text (.txt), Markdown (.md), Rich Text (.rtf), HTML, CSV, and images containing text (via on-device OCR). DEVICE REQUIREMENTS iPhone or iPad with sufficient RAM for on-device AI. Sigmy adapts memory settings automatically to your device. The language model (~3.4 GB) is included in the app — no separate download after install. Works fully offline once installed. — SUBSCRIPTION TERMS Sigmy Pro is an auto-renewable subscription. • Pro Monthly: $5.99 per month after a 7-day free trial. • Pro Yearly: $39.99 per year after a 14-day free trial. • Lifetime Pro: one-time $79.99 non-renewing purchase. Payment will be charged to your Apple Account at confirmation of purchase. Subscriptions renew automatically unless auto-renew is turned off at least 24 hours before the end of the current period. Your account will be charged for renewal within 24 hours prior to the end of the current period. You can manage and cancel your subscription in Settings → Apple Account → Subscriptions. Privacy Policy: https://www.sigmygroup.com/privacy Terms of Use: https://www.sigmygroup.com/terms
Screenshots
Verdict
The clearest difference is update cadence: ERMIS at every 5 days against Sigmy's every 2 weeks. On price, ads, in-app purchases and device support 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 4 in-app purchases, starting at $12.99 per month and Sigmy sells 3 in-app purchases, starting at $5.99 per month. Whichever you choose, the download price is not the number that matters.
ERMIS ships an update every 5 days, Sigmy every 2 weeks. The most recent releases landed on November 11, 2026 and October 31, 2026 respectively.
| Parameter | ERMIS | Sigmy |
|---|---|---|
| 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 2 weeks |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone | iPhone |
| Requires iOS | 17.0 | 17.0 |
| Further details — not scored | ||
| Size | 17 MB | 3.2 GB |
| Age rating | 4+ | 4+ |
| Developer | Ilya Vishneuski | SIGMY GROUP PTY LTD |
In-app purchases
ERMIS
- Premium3 Days trial$12.991 Month
- Premium3 Days trial$19.991 Month
- Premium3 Days trial$129.991 Year
Show 1 moreShow fewer
- Premium3 Days trial$199.991 Year
Sigmy
- Pro Monthly7 Days trial$5.991 Month
- Pro Yearly14 Days trial$39.991 Year
- Lifetime Pro$79.99





