Module 4 of 4 in Advanced Swift Techniques

App Observability

Oct 24 2025, Swift 6, iOS 18, Xcode 16.5
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This module covers the basic concepts of App Observability (App Telemetry) which allows you to gather insights, possibly in real-time on how your application is performing on users’ devices around the world, how to collect performance information on how well/fast your app is working, especially with different network conditions that users can’t experience. When a failure happens, what was going on before that led to that failure. By Ehab Amer.

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EXPERIENCE
Intermediate level
EST TIME TO COMPLETE
1 min
CONTENT
6 lessons
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Module outcomes

  • Learn about OpenTelemetry
  • Setup Telemetry and Tracings for your iOS App
  • Understand how your app performs in the hands of your users
  • Measuring app performance in near-realtime

Covered concepts

  • OpenTelemetry
  • Spans and Traces
  • App Metrics
  • MetricsKit
  • App Observability API Design
  • Swift TaskLocal
  • Data Privacy

Module content

1
Introduction to OpenTelemetry Lesson (1 min)

In this lesson, you’ll setup your Grafana dashboard to visualize OpenTelemetry data. Then you’ll integrate OpenTelemetry with your application to collect your first app metrics.

 Start
Introduction • Start Reading · 2 mins
Getting Started Reading · 2 mins
Integrating OpenTelemetry Reading · 6 mins
Conclusion Reading · 1 min
Introduction to OpenTelemetry Quiz 7 questions
2
OpenTelemetry Traces & Spans Lesson (1 min)

In this lesson, you’ll focus on Tracing in OpenTelemetry. You’ll create spans, connect them, and add attributes to them. You’ll also learn about task-local spans and how they can be used to manage context in asynchronous operations.

 Start
Introduction • Start Reading · 1 min
Sending Spans with Start & Finish Reading · 6 mins
Attaching Attributes to Spans Reading · 3 mins
Connecting Spans Together Reading · 5 mins
Using TaskLocal to Connect Spans Reading · 5 mins
Conclusion Reading · 1 min
OpenTelemetry Traces & Spans Quiz 7 questions
3
OpenTelemetry Metrics Lesson (1 min)

In this lesson, you’ll focus on Metrics in OpenTelemetry. You’ll learn about different types of metrics such as gauges, histograms, and counters. You’ll also explore how to create and manage these metrics in your code.

 Start
Introduction • Start Reading · 1 min
Gauges Reading · 4 mins
Counters Reading · 2 mins
Histograms Reading · 6 mins
Conclusion Reading · 1 min
OpenTelemetry Metrics Quiz 7 questions
4
OpenTelemetry Events & Logs Lesson (1 min)

In this lesson, you’ll learn about OpenTelemetry Events & Logs, and how they bring value to your application.

 Start
Introduction • Start Reading · 1 min
Logs Reading · 5 mins
Events Reading · 7 mins
Conclusion Reading · 1 min
OpenTelemetry Events & Logs Quiz 7 questions
5
MetricsKit Lesson (1 min)

In this lesson, you’ll learn about Apple’s MetricsKit, a framework for collecting and analyzing app usage data and crash reports.

 Start
Introduction • Start Reading · 1 min
MetricsKit Metrics Reading · 12 mins
MetricsKit Diagnostics Reading · 7 mins
Conclusion Reading · 1 min
Apple MetricsKit Quiz 7 questions
6
Designing Your APIs Lesson (1 min)

In this lesson , you’ll learn some guidelines that would help you design the APIs for your Observability framework and ensure simplicity and usability while also increasing value for your product and business.

 Start
Introduction • Start Reading · 1 min
Spans or withSpan Reading · 11 mins
Logging Levels Reading · 4 mins
Personally Identifiable Information Reading · 4 mins
Conclusion Reading · 2 mins
Designing Your Observability APIs Quiz 7 questions