An end time earlier than the start (e.g. 20:00 → 02:00) is treated as crossing midnight.
Off = the Horizon always spans the full 24 hours.
Beams (zoom)
minutes
minutes
Completed time
minutes visible
Sound
Screen & notifications
Useful when Horizon lives on a second monitor or an idle phone. Browser support varies.
Import anything
Select one or many files: full backups, settings, events (all or single), notes, signals, or a Google Calendar .ics export. Horizon detects each file's type automatically.
Export
"Each item as its own file" downloads one small .json per item so you can edit or re-import a single thing. To restore many, use Import files and multi-select them all.
Reset
Signals fire a web request (webhook) when something happens — so Horizon can flip smart lights, ping Home Assistant / IFTTT / Zapier, or trigger a text through a relay. The target service must accept cross-origin requests; see the setup guide for recipes.
Rules
Add a rule
HORIZONv1.0 — your temporal GPS.
A single-file, offline-first day instrument for time blindness. Everything is stored in this browser (localStorage) — make a full backup from the Data tab now and then. High beams show your whole day; low beams zoom to what's next, like a GPS approaching a turn. Tap anything on the Horizon for quick actions. Tap a dashboard light to force it on/off/auto.
Built for a second monitor or an idle phone: enable Keep screen awake in Sound & alerts. Data model is sync-ready (every item carries a source field) for a future Google Calendar / Notion phase — today you can already import a Google Calendar .ics export.
Events & statuses
Notes
Add item
Horizon
v1
Time-awareness dashboard with entity tracking and signal toggles.
STORAGE — Browser storage (localStorage)
Saves automatically in this browser. Clearing site data, or switching browsers or devices, loses everything.
Export: JSON download available · Import: supported
Saves automatically in this browser. Clearing site data, or switching browsers or devices, loses everything. Your work should still be here when you come back, but export a copy if you want to be safe.