Core Features

An overview of what the Pulse iOS SDK captures automatically and what requires opt-in.

Automatic Telemetry

The following is captured from the moment Pulse.shared.initialize(...) is called — no additional code required:

Signal	Description
URLSession requests	Every HTTP request made via URLSession: method, URL, status code, duration, error
Crashes	Mach exceptions, signals, Objective-C/C++ crashes — full symbolicated report on next launch
Screen transitions	UIViewController viewDidLoad, viewWillAppear, viewDidDisappear lifecycle
App lifecycle	Foreground and background events
App startup	Cold launch duration from SDK init to first screen appearing
Session tracking	Unique session ID stamped on every span and log

Opt-In Instrumentation

These require explicit configuration in the instrumentations closure:

Instrumentation	What it captures	How to enable
UIKit Tap	Touch events, tap targets, rage clicks	config.uiKitTap { $0.enabled(true) }
Location	Geo attributes on all spans (lat, lon, country, city)	config.location { $0.enabled(true) }
Session Replay	Screenshot-based session recording with privacy masking	config.sessionReplay { $0.enabled(true) }
Interaction Tracking	Multi-step user flow timing from server config	config.interaction { $0.enabled(true) }

Remote-Managed Behavior

Beyond local initialize() settings, Pulse fetches a server-side config from your backend on every launch. This lets you change the following without shipping a new app version:

What	Examples
Sampling rates	Collect 10% of sessions globally, or 100% for a specific OS version
Feature flags	Disable session replay for a specific app version; enable interaction tracking for a subset of users
Attribute mutations	Drop a PII field across all signals, or inject a computed attribute into every span
Signal routing	Route custom events to a separate collector endpoint
Interaction config	Update the URL where user-flow definitions are fetched without changing app code

The config is fetched in the background on launch and applied on the next launch. All of this is managed from the Pulse dashboard — no SDK update required.

See SDK Initialization → Remote Config for the full breakdown.

---

Automatic Instrumentations (detailed guides)

• Network — URLSession request spans
• Crashes — Crash detection and reporting
• Screen Lifecycle — UIViewController events
• Sessions — Session lifecycle management
• App Startup — Launch timing
• UIKit Tap — Touch and rage-click tracking
• Location — Geo attribute enrichment
• Custom Spans — Manual performance tracing
• Custom Events — Business event tracking
• Error Tracking — Non-fatal error reporting