SG LightningMon — Real-time lightning proximity alerts on your wrist.
Powered directly by NEA's live lightning data (data.gov.sg), get
distance-to-strike readings for your exact location, right on
your Pebble watch — no app server, no middleman.
FEATURES
GPS-based distance — Calculates your live distance to the
nearest active lightning strike
Color-coded alerts — RED (<3km) / ORANGE (<10km) / GREEN (>10km)
fills the whole screen so status is visible at a glance
Strike type detection — Distinguishes cloud-to-ground (C-G)
from cloud-to-cloud (C-C) strikes
108-location lookup — Pinpoints the nearest neighbourhood or
estate to each strike, not just a handful of town centres
Adaptive rolling window — Auto-tightens from 10 to 5 minutes
during active storms to keep data current
Live clock — Watch face shows current time, refreshing every
minute
Auto-refresh — Lightning data updates every 2.5 minutes
REQUIREMENTS
None — uses NEA's public API directly, no account or key needed
Location Services enabled on your phone (for GPS)
SUPPORTED WATCHES
Pebble Time 2 (Emery) — optimised
HOW TO USE
Open the app on your watch
Grant location permission when prompted on your phone
Watch updates automatically every 2.5 minutes
RED means seek shelter — check the display, not just glance at the color
Approximate distances only. Not a certified life-safety device —
always follow official NEA/SCDF advisories during severe weather.
Tested with Pebble Time 2 only.
Built with ❤️ in Singapore.
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