Answers to common questions about SunLah — Singapore weather, air quality, and getting around — plus how to reach us.
SunLah shows you Singapore's weather, UV, air quality, and getting-around information for the next few hours — drawn straight from Singapore's open government data. There's no account to create: open the app and you're in.
The four tabs are Today (right-now weather and a "should I go outside?" score), Forecast (the days ahead), Air (PSI and haze by region), and Around (live taxis, carparks, and traffic cameras near you).
SunLah matches your live location to one of Singapore's NEA forecast areas. If you haven't granted location permission, it shows data for central Singapore instead and displays a "Grant location" prompt on the Today tab.
To enable it: iPhone Settings → Privacy & Security → Location Services → SunLah → While Using the App. The app picks up the change automatically the next time you open or refresh it.
Pull down to refresh the Today tab, or reopen the app. If your device's Location Services are switched off entirely, turn them on in Settings → Privacy & Security → Location Services.
Alerts are opt-in per type. Open Settings (gear icon) → Alerts in the app and turn on the ones you want.
Also make sure notifications are allowed for SunLah on your device: iPhone Settings → Notifications → SunLah → Allow Notifications.
Only when conditions actually change — rain expected in the next couple of hours, a high UV reading, or air quality entering the unhealthy range. There are no marketing or promotional notifications.
All readings come directly from Singapore's open data (data.gov.sg) and live transport feeds (LTA DataMall). They can occasionally be delayed or briefly unavailable at the source. Pull to refresh to fetch the latest; if a section is temporarily empty, the source is between updates.
No. SunLah is an independent product. It is not affiliated with or endorsed by the Government of Singapore or any of its agencies — it simply presents publicly available open data.
No. All core features work without signing in.
It's used only to find your weather area and nearby taxis. We don't store it on our servers and we never sell it. Full details are in our Privacy Policy.
English and Tiếng Việt (Vietnamese). The app follows your device language and can be overridden in the app's Settings. SunLah runs on iPhone with a recent version of iOS.
Still stuck, or have feedback or a bug to report? We'd love to hear from you — email us and we'll get back to you as soon as we can.
When reporting a problem, it helps to include your device model, iOS version, and a short description of what you were doing.