Preview
As seen through the Display Open live preview ↗A live render at the true 600×600 Display size. On the glasses the dark areas are fully transparent — only the bright UI floats over the real world. If it stays blank the app blocks embedding; use the link above.
About
A hands-free HIIT / interval coach for the Display — set it once and never look at a phone mid-set. Dial Work seconds, Rest seconds and Rounds, tap Start, and it runs the whole thing: a get-ready lead-in, then Work / Rest alternating for every round, auto-advancing with a huge glanceable countdown, a colour shift per phase, distinct WebAudio cues on every change, a 3-2-1 lead-in beep and a finish fanfare. Pure D-pad: ↑ pause/resume · → skip the current phase · ← stop. Your last Work/Rest/Rounds is remembered. 100% offline. Power/demo: ?work=&rest=&rounds=&prep= override the set.
Features
- Configurable Work / Rest / Rounds + lead-in
- Auto-advancing prep → (work → rest) ×N → done
- Huge countdown, phase colour shift, total-time estimate
- WebAudio phase cues + 3-2-1 + finish fanfare
- ↑ pause · → skip · ← stop — pure D-pad
- Config saved · 100% offline
Good to know
- Audio needs the device unmuted
- Timing runs while the app is open (foreground)
- One set at a time (no saved workout library yet)
Data safety
No third-party sharing. Herald doesn't sell or share your data, and there are no ads or trackers.
Minimal collection. Only what a linked service needs — provider tokens are encrypted on Herald's server and never stored on the glasses.
Encrypted in transit. All traffic is HTTPS.
You're in control. Disconnect any linked service at any time from the companion.
Ratings & reviews