HeatLine: Heat Index
Wet bulb heat index for crews
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
Read the heat index in the sun and the shade - the real number for the spot you're standing in.
HeatLine reads the heat index for the spot you are standing in - the shade value and the sun-adjusted value side by side - so you can read the real number at a glance while you work.
Outdoor crews, coaches, and anyone who works in the heat get a clear number with the source and the time it was read, never a stale guess.
- Live readings for your exact location, shown for both shade and full sun
- On-device wet-bulb estimate, with no network needed
- A manual calculator that works fully offline - type the temperature and the humidity from any thermometer and get the math instantly
- A single haptic the moment you cross the line you set
- A per-shift log you can keep, export, and hand off
HeatLine is general weather and safety information for outdoor work. It is not medical advice and it is not a workplace heat-stress assessment - decisions about working and resting stay with you and your employer. Risk labels follow published heat-index thresholds, and every reading carries its source and timestamp so you always know where the number came from.
No account, no watermark. Nothing about your location is sold or shared.
Privacy Policy: https://docs.google.com/document/d/e/2PACX-1vTDX9pxPOlUJl_skVUHPi99mAw0y2B2BYd_v1mJkoF3xW3rlOcW5KlYd4t93MMbbGhctSTnBTy7d_l6/pub
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Ratings & Reviews
The developer, Andrii Bashta, 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 Not Linked to You
The following data may be collected but it is not linked to your identity:
- Usage Data
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Andrii Bashta
- Size
- 9.7 MB
- Category
- Weather
- Compatibility
Requires iOS 26.0 or later.
- iPhone
Requires iOS 26.0 or later. - iPad
Requires iPadOS 26.0 or later. - Mac
Requires macOS 26.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 26.0 or later.
- iPhone
- Languages
- English
- Age Rating
9+
- 9+
- Contains
Health or Wellness Topics
- In-App Purchases
Yes
- Lifetime $9.99
- Copyright
- © 2026 Andrii Bashta
