HeatLine: Heat Index

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/