Heat Index: Worksite Safety
Live sensor heat-break alerts
Only for iPhone
Free · Designed for iPhone. Not verified for macOS.
iPhone
On-site sensors read the real-time heat index and tell your whole crew — right on the Home Screen widget — the moment an extra heat break is authorized.
When the heat climbs on a worksite, every crew needs the same clear answer: is it hot enough for an extra break right now? Heat Index gives you that answer in real time — straight from a sensor on your own site.
Heat Index is the companion app for a connected worksite heat sensor. A small on-site device (a Raspberry Pi with a temperature and humidity sensor) reads conditions every hour, calculates the true "feels-like" heat index, and sends it securely to your team. Open the app — or just glance at the Home Screen widget — to see the current reading and whether today's extra heat break has been authorized.
It's built for the people responsible for crews in the heat: warehouse and packing-floor supervisors, operations and EHS managers, commercial kitchens, and any jobsite where temperature drives safety decisions.
WHAT YOU GET
• Live now — the current heat index in big, glanceable numbers, with temperature and humidity. Green means an extra break is on; blue means conditions are below the threshold.
• Home Screen widget — small, medium, and large sizes show the latest reading without opening the app.
• 12-month history — daily peaks roll up into a clean monthly chart so you can see the whole season at a glance.
• Sensor health — keep an eye on the Raspberry Pi's own temperature so your data never quietly drops out.
• Controlled team access — each member joins your organization with a code, and an administrator approves who gets in. Your readings stay inside your organization.
HOW IT WORKS
Heat Index pairs with a connected sensor reporting from your site. You'll need an organization code from your administrator to join, and a sensor reporting data for your location. Once you're approved, the app opens straight to your live reading.
SIGN IN
Create an account with email and password, or use Sign in with Apple. You can delete your account and all of its data from inside the app at any time.
PRIVACY
We collect only what's needed to sign you in and connect you to your organization — your email, name, and account identifier. No ads. No tracking. No third-party analytics.
Heat Index turns one sensor into one shared answer for the whole crew — so the call to take a break is based on real conditions, not guesswork.
Ratings & Reviews
The developer, Ninville Keith, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Linked to You
The following data may be collected and linked to your identity:
- Contact Info
- Identifiers
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Ninville Keith
- Size
- 5.8 MB
- Category
- Utilities
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Ninville Keith