Hermai
TRMNL devices from anywhere
Free · Designed for iPad. Not verified for macOS.
Manage your TRMNL fleet from anywhere. View devices, check screens, and grab API keys — all in a calm, distraction-free companion app built for developers.
Hermai is a minimalist companion app for TRMNL e-ink device owners. Named after the ancient Greek inscribed stone pillars that displayed information at crossroads, Hermai brings calm, focused device management to your pocket.
See your fleet at a glance
View all your TRMNL devices in one place. Each device card shows its name, status, battery level, WiFi strength, and a thumbnail of what's currently on screen — so you know everything is running without opening a browser.
Inspect any device in detail
Tap into a device to see its full profile: firmware version, MAC address, signal quality, refresh rate, battery voltage, and Developer Edition status. The current display section shows a large preview of exactly what your TRMNL is showing right now.
Set up devices and retrieve API keys
Select your device model and provision it directly from the app. Once set up, your Device API Key is stored securely and ready to copy with a single tap.
Preview your screens
See what each device is displaying without advancing the playlist. The current screen preview loads the live image from your device so you can inspect e-ink rendering on the go.
Built for developers
Quick access to Device API Keys, Friendly IDs, and MAC addresses. Everything a Developer Edition user needs to integrate, debug, and manage their TRMNL setup.
Private by design
Hermai has no backend server. Your API keys are stored exclusively on your device using iOS Keychain, never transmitted anywhere except directly to the TRMNL API. No analytics, no tracking, no cloud sync. Logout erases everything.
Calm technology
No push notifications. No badges. No urgency. Just pull-to-refresh when you want. A monochrome, e-ink-inspired interface that respects your attention — just like TRMNL itself.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, Tomita Militaru, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Tomita Militaru
- Size
- 582.7 KB
- Category
- Utilities
- Compatibility
Requires iOS 26.2 or later.
- iPhone
Requires iOS 26.2 or later. - iPad
Requires iPadOS 26.2 or later. - Mac
Requires macOS 26.2 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 26.2 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Tomita Militaru