ECG+ | Your Watch ECG Reader

More accurate and honest measurements An upgraded measurement engine (v1.18) reads waves more faithfully. When a wave cannot be reliably identified, for example a P wave with very low amplitude, instead of throwing a bunch of numbers around, ECG+ now marks the area it searched and explains why it's not a good idea to measure an unclear wave. This is often seen on recordings with lots of artifacts (noise) caused by poor contact. Search your recordings Find any recording in seconds. Search by symptoms, triggers, notes, or findings.

A cardiologist reading an ECG report always wants more context: what symptoms you felt when the recording was taken, and what might have led up to it, such as a big meal, alcohol, coffee, anxiety, or poor sleep. In version 1.17 we expanded the symptoms section into a full Journal, where you can capture these details for your doctor to consider. Journal makes ECG+ smart interpretation genuinely useful. When you ask about a recording, ECG+ reads your symptoms and triggers alongside the waveform data and addresses them directly: whether the flutter you felt lines up with what the trace shows, or whether last night's poor sleep could explain the extra beats. And across your whole history, Journal reveals patterns and triggers, like premature beats that cluster after coffee, or calmer readings in weeks you slept well. The more you record, the more ECG+ can connect, and easier it finds those triggers behind the episodes. Apple Watch ECG produces relatively low P wave amplitude, and 1.17 introduced a new specific algorithm in finding where P waves start and end, by zooming in really deep into the waveform. This significantly reduces overestimation.

Some Apple Watch ECG readings come through with very low amplitude. These are often perfectly normal, but a small waveform can be hard to read clearly. Version 1.16.2 introduces Magnifier, so you and your doctor can see the finer detail. A trend often tells you more than any single reading, whether that's HRV or arrhythmia burden. We've redesigned trends in 1.16.2 to make important changes over time stand out, while still letting you jump straight to individual readings. Managing your subscription is easier too. A new Subscription option in Settings lets you upgrade or change your Premium plan in a couple of taps.

Your heart felt off. You went to capture it. But Apple Watch just said "Poor Recording." Again and again. Usually the cause is simple: even the smallest movement can blur the trace. So 1.16.x introduces "Breathe, then record", a few guided breaths to help you settle and hold still, so the recording comes out clean when it matters most. Clean signal in, clearer findings out. The cleaner the recording, the more accurate the report your doctor receives. Many of you use ECG+ to watch one thing in particular: PACs or AFib. Now burden trends show how often they appear over time. Holding steady can bring peace of mind. Trending upward is your cue to take a closer look with your doctor. And there's groundwork you won't see: 1.16.x is rebuilt on the latest Apple technologies, so ECG+ is ready for what's coming next.

Your heart felt off. You went to capture it. But Apple Watch just said, “Poor Recording.” You tried again, held your breath, kept your finger steady, yet again: “Poor Recording.” Most of the time, the cause is simple. Even the smallest movement can blur the trace. So version 1.16 introduces “Breathe, then record.” A few guided breaths to help you settle and hold still, so the next recording comes out clean, right when it matters most. Analysis is only as good as the recording behind it. Clean signal in, clearer findings out. The cleaner the recording, the more accurate the report your doctor receives to help guide their decisions. Many of you use ECG+ to keep an eye on one thing in particular: PACs or AFib. Version 1.16 makes that easier with burden trends, showing how often they appear over time. Holding steady or easing off can bring peace of mind. Trending upward is your cue to take a closer look and discuss it with your doctor. And there’s groundwork you won’t see. Version 1.16 has been rebuilt on a modern foundation using the latest Apple technologies, so ECG+ is ready for what’s coming next.