Mercury Voice
Spencer McGuire Productivity iPhoneiPadiPod touch
Mercury Voice is a free Productivity app for iPhone and iPad by Spencer McGuire. Requires iOS 17.0. Updated September 28, 2026.
- Price
- Free
- on the App Store
- Size
- 3 MB
- Age 12+
- Updated
- Sep 28
- 2026 · v1.0
Screenshots
About Mercury Voice
Mercury Voice is a native voice client for Hermes Agent — talk to your self-hosted AI agent hands-free, on your Mac or iPhone. Speak naturally and Mercury Voice listens, transcribes, sends your prompt, and speaks the reply back to you — then re-arms to listen again, so you can keep a real conversation going without touching the screen. FEATURES • Hands-free voice loop — listen, transcribe, submit, speak, repeat • Full-duplex barge-in — interrupt the agent mid-reply just by talking, no button required • Spoken stop words to end a turn without reaching for your device • Live captions of the agent's spoken reply as it streams • Lock-screen Live Activity on iPhone — see session status and mute, stop, or end the conversation without unlocking • Password and native OAuth sign-in for gated servers, or simple token login for local setups • Reconnects automatically and picks up right where a reply left off, even after a dropped connection • One native app, built for both macOS and iOS • Siri Shortcut support so you can start a new session using just your voice YOUR SERVER, YOUR DATA Mercury Voice connects to a Hermes Agent backend that you run yourself. Nothing is sent to a third-party service by this app — you point it at your own server address and sign in with your own credentials. REQUIRES A running Hermes Agent backend (see github.com/NousResearch/hermes-agent). This app does not include or host a backend.
App privacy
The developer, Spencer McGuire, reported these privacy practices to Apple.
Data Not Collected
The developer does not collect any data from this app.
Alternatives to Mercury Voice
Looking for apps like Mercury Voice? Here are 6 similar apps on the App Store. The highest rated is Anycap: Capture & Bookmarks (5.0/5), and all 6 are free to download.
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5.0
| App | Rating | Price | Last updated | Compare |
|---|---|---|---|---|
| Mercury Voice | – | Free | September 28, 2026 | |
| Second Brain - Voice Notes | – | Free | Feb 24, 2026 | Compare |
| Companion for Hermes Agent | – | Free | Oct 24, 2026 | Compare |
| Voice To Type | – | Free | Jun 21, 2025 | Compare |
| Speech Notes: Voice Note Taker | – | Free | Oct 11, 2026 | Compare |
| Mobility for Jira - Intune | – | Free | Sep 3, 2026 | Compare |
| Anycap: Capture & Bookmarks | 5.0 / 5 (2) | Free | Oct 22, 2026 | Compare |
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