For a 70 km/h limit: green up to 70; red above 70.
Alert threshold = limit − tolerance. Positive values warn earlier; negative values warn later. Saved on this phone.
Coverage & phone setup
Limits are estimates from nearby LTA speed-limit signs, not verified road matches. Parallel roads, junctions, temporary limits and time-dependent zones may differ. No nearby sign means no limit or alarm; a green number is not confirmation that driving is legal.
Keep this app visible with location enabled and media volume audible. Install from your browser menu (iPhone: Share → Add to Home Screen). Browser restrictions can pause GPS or sound in the background. Screen wake requires browser support.
Your location stays on your phone. No location is uploaded.
LTA traffic-sign data ↗
URA Singapore boundary data ↗