The lightest smart glasses here hide their screen entirely — and their AI answers questions you haven’t asked yet.
What Are the Halliday Glasses?
Halliday ($489) bets everything on subtlety. A tiny ‘DigiWindow’ projector hidden in the frame’s top edge beams a monochrome image that reads like a 3.5-inch screen — invisible to everyone but you — in the lightest frame on our list at 28.5 grams.
Control comes from an included trackpad ring on your finger, and the signature feature is proactive AI: the assistant listens to conversation context and floats suggested answers before you ask.
The DigiWindow: Clever, With a Catch
Because the projector sits above the lens rather than inside it, the lenses stay completely ordinary — no waveguide shimmer, free prescription lenses included. Nobody can tell these are smart.
The catch reviewers note: you glance up to read the display, an eye movement that takes practice and looks slightly odd mid-conversation. It works, but it is the least natural reading position of the display pairs we have tested.
Proactive AI and the Trackpad Ring
Halliday’s assistant does not wait for a wake word. In a meeting it can float a relevant fact; mid-conversation it can suggest an answer to the question you were just asked. When it lands, it feels like a superpower; when it misfires, you dismiss it with the ring.
That ring — a small trackpad worn on your finger — is the best control scheme here: scrolling notes or dismissing cards silently beats tapping your temple or talking to the air. Translation covers 40 languages in real time, plus notes, notifications and navigation on-eye.
Weight, Battery and Price
At 28.5 grams the Halliday simply disappears on your face — the difference from a 49-gram pair is bigger than the numbers suggest over a full day. Battery runs up to 12 hours, strong for a display device.
At $489 it sits between the camera pairs and the premium HUDs. You give up any camera, full-color graphics and big-brand polish; you gain invisibility, featherweight comfort and the most novel AI behavior in the category.
How Halliday AI Glasses Compares
Pros and Cons
What we liked
- Lightest on the list at 28.5 g — all-day invisible comfort
- Display is completely undetectable to others
- Proactive AI is genuinely novel and often useful
- Trackpad ring is the best smart-glasses control we have tried
- Up to 12-hour battery; free prescription lenses
What could be better
- Glancing up to read the display feels unnatural at first
- No camera and monochrome-only visuals
- Proactive suggestions occasionally misfire
- Young brand — long-term software support unproven
Who Should Buy the Halliday Glasses?
Curious minimalists who want glanceable AI at the lowest possible weight — and meeting-heavy professionals drawn to proactive prompts. If the glance-up ergonomics worry you, the Even Realities G1 puts its display in a more natural position for $110 more.
Our Verdict on the Halliday Glasses
Halliday is the most original thinker in our best AI smart glasses lineup: invisible display, ring control, AI that anticipates. Not every bet lands — the glance-up takes adjusting — but at 28.5 grams and $489 it is a charming, genuinely different take on what smart glasses should be.
Want More AI Hardware?
If you are still comparing frames, start with our full roundup of the best AI smart glasses — it ranks every pair here side by side. Its closest philosophical rival is covered in our Even Realities G1 review. And for everything else we have tested, browse all our AI hardware reviews.
Frequently Asked Questions
How does the Halliday display work?
A tiny DigiWindow projector hidden in the frame’s top edge beams a monochrome image equivalent to a 3.5-inch screen into your eye — invisible to everyone around you. You glance slightly upward to read it.
What is proactive AI on the Halliday glasses?
The assistant follows conversational context and floats suggested answers or relevant facts before you ask — a meeting superpower when it lands, dismissible with the ring when it does not.
How heavy are the Halliday glasses?
28.5 grams — the lightest smart glasses in our ranking, light enough to forget you are wearing them.
Do the Halliday glasses have a camera?
No. Like the Even Realities G1, Halliday is display-and-AI only, which keeps weight, battery drain and privacy concerns down.
How long does the Halliday battery last?
Up to 12 hours of use — strong for display glasses, helped by the efficient monochrome DigiWindow.
How much do the Halliday glasses cost?
$489, including the trackpad ring and free prescription lenses.
