Replay Capture Coverage %, FullStory

Replay Capture Coverage % for FullStory stores. Tracked live in Vortex IQ Nerve Centre. How to read it, why it matters, and how to act on it.

Metrics type: Supporting Metrics • Category: Executive Overview

At a glance

Replay Capture Coverage % is the data-quality metric for FullStory itself. It measures the share of expected sessions that were successfully captured as full replays. Because every other FullStory card depends on capture working, this is the card that tells you whether you can trust the rest. When coverage drops, the FullStory snippet is failing to load somewhere: a tag-manager change, a consent-banner block, a deploy that dropped the script. A blind spot here quietly understates every frustration and conversion signal downstream.

What it counts	The percentage of expected sessions that FullStory successfully captured as replays in the period.
Sample type	Backend API data from FullStory, refreshed on the standard data refresh.
Why it matters	It is the trust gauge for the whole connector. If capture is low, every other FullStory metric is reading a partial picture, so this card belongs at the top of any investigation.
Reading the value	Higher is better. A drop usually means the snippet stopped firing on a template, a device, or behind a consent gate; reconcile with recent deploys.
Currency	percent
Time window	30D vsP
Alert trigger	<80%
Sentiment key	fs_replay_capture_coverage
Roles	owner, marketing

Calculation

Calculated automatically from your FullStory data. Vortex IQ compares the sessions FullStory captured against the expected session baseline for the period and expresses the ratio as a coverage percentage. See the At a glance summary above for what the metric tracks and the worked example below for a typical reading.

Worked example

A representative reading of Replay Capture Coverage % for a typical merchant on FullStory. Suppose coverage runs at 94% then drops to 71%, under the 80% guardrail. The drop maps to a new consent-management platform that holds the FullStory snippet until opt-in, so a large slice of EU traffic never gets captured. The fix is to load FullStory under the correct consent category. Until then, every frustration card understates reality for that audience. For deeper investigation, use Vortex Mind to see which pages or regions lost capture; for natural-language exploration, ask Ask Viq where capture dropped.

Sibling cards merchants should reference together

Card	Why merchants reach for it
fs_session_count	The raw captured-session count this coverage ratio sits on top of.
fs_health_score	Capture health is a pillar of the UX health composite.
fs_alert_tracking_broken	The alert that fires when capture collapses.
fs_frustration_score	Reads low when capture is incomplete, so check coverage first.

Reconciling against the vendor’s own dashboard

Where to look in FullStory’s own dashboard:

FullStory exposes capture health through its settings and data-capture diagnostics, and you can see captured session volume in session search. Confirm period boundaries and any sampling settings match the Vortex IQ profile to reconcile cleanly.

Why the Vortex IQ value may legitimately differ:

Reason	Direction	What to do
Sampling. If FullStory capture is sampled, the expected baseline must account for it.	Variable	Confirm the sampling rate.
Period boundary. Vortex IQ uses 30-day rolling by default; FullStory dashboards may use calendar periods.	Variable	Match the period range.
Baseline definition. Expected sessions can be drawn from different traffic sources.	Variable	Align the baseline source.

Cross-connector reconciliation: complement with the captured-sessions count and the capture-broken alert. For divergence investigations, use Vortex Mind.

Known limitations / merchant FAQs

Q: How often does Replay Capture Coverage % update? The card refreshes on the standard data refresh (typically every 30-60 minutes for live integrations). For real-time signals, force a manual refresh from the dashboard.

Q: Why is coverage never exactly 100%? Some sessions are always lost to ad blockers, consent declines, very short bounces, and unsupported browsers. The goal is a stable high coverage, not a perfect one.

Q: Why does my FullStory dashboard show a different number? The most common reasons are sampling settings, period boundaries, and how the expected-session baseline is drawn. Match these before assuming a real divergence.

Q: Can I customise the alert threshold? Yes, alert thresholds are configurable per profile in the Alert Rules tab. The sub-80% default is a starting point; tune it to your own baseline.

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Tracked live in Vortex IQ Nerve Centre

Replay Capture Coverage % is one of hundreds of KPI pulses Vortex IQ tracks across FullStory and 70+ other ecommerce connectors. Nerve Centre runs the detection layer; Vortex Mind investigates the cause when something moves; Ask Viq lets you interrogate any number in plain English.

Start for free or book a demo to see this metric running on your own data.