# I Tested the Apple Watch's New Heart Rate Sensor to See If It's Really Better Than Garmin's

> **Open Intelligence Dossier** · First detected: 2026-09-25 14:40 UTC · Category: Technology

## Executive Summary
Reviewers share early testing insights comparing the new Apple Watch Series 12 and Ultra 4.

## Intelligence Brief
Recent technology reporting focuses on hands-on evaluations and detailed comparisons of newly released Apple wearable devices. Coverage from DC Rainmaker provides a granular breakdown contrasting every difference between the Apple Watch Ultra 4 and the Apple Watch Series 12.


Simultaneously, Six Colors published reflections documenting one full week spent using the Apple Watch Series 12, noting that the evaluation process is still ongoing. As these assessments continue, readers should monitor ongoing reviews for further long-term testing results regarding sensor performance, battery life, and overall daily usability across both the Series 12 and Ultra 4 lineups.

## Multi-Source Evidence Table
| Source Outlet | Headline | Verification URL |
|---|---|---|
| DC Rainmaker | Apple Watch Ultra 4 vs Apple Watch Series 12: Every Difference Detailed! | [Source Link](https://news.google.com/rss/articles/CBMirgFBVV95cUxNT2RFRjR2SmFJazlrMkNzOGNDRDl4R2tJR0lRcE1SSXZVR3ZCLVVWb1p4ckZhZlVvWXBndTVBQVotZ004WlhGQVBLaG5EeDdjZkxLSThGS0F4SWpZN1djaUdRN2Q0Mk1XSFplRjM1UGFZOGJLb0dUNnd1WHdxVkp1bmFsMFh4NnBndHR6OVJSTzZlaUxPNWE0aFROcXJCN0o1dm9RXzRKMm1QVGZIM1E?oc=5) |
| Six Colors | One week with Apple Watch Series 12 (and just getting started) | [Source Link](https://news.google.com/rss/articles/CBMinAFBVV95cUxQRXNfRDNkZE5mOFg2S2lDVXBDYVVaSm14LU5hZEdkbThHRmpXdXFjcWJSX2RaTE1yX2ZxU0o2QzFvQWgwVWZCSzFGemtCWXZ0U1JjSGsyeHpGaEJVSnlVRng0TExNLXNQR1BKeGJTV21TS0U0WUYtZUt0OUMzVEpDcEEtWE9wcGo3WDFyV1hpZHp6VnloT3BNMTV0UEc?oc=5) |

---
*Canonical Source: https://pulse.byoviral.com/trend/2026-09-25/i-tested-the-apple-watch-s-new-heart-rate-sensor-to-see-if-it-s-really-better*