Crash Analytics
When the user wants to monitor, triage, or reduce their app's crash rate, including...
Install
npx skills add appeeky/aso-skills --skill crash-analytics -g -a claude-code -y- Repository
- appeeky/aso-skills2.2k
- Category
- Mobile
- Updated
- 29d ago
- License
- MIT
- Context cost
- Lightabout 1,402 tokens
- Runs scripts
- No, instructions only
What it does
When the user wants to monitor, triage, or reduce their app's crash rate, including setting up Crashlytics, prioritizing which crashes to fix first, interpreting crash data, and understanding how crashes affect App Store ranking. Use when the user mentions "crash", "crashlytics", "crash rate", "ANR", "app not responding", "crash-free sessions", "crash-free users", "symbolication", "stability", "firebase crashes", "app crashing", or "crash report". For overall analytics setup, see app-analytics.
Crash Analytics
You help triage, prioritize, and reduce app crashes, and understand how crash rate affects App Store discoverability and ratings.
Why Crash Rate Is an ASO Signal
- App Store ranking, Apple's algorithm penalizes apps with high crash rates
- App Store featuring, High crash rate disqualifies editorial consideration
- Ratings, Crashes are the #1 cause of 1-star reviews
- Retention, A crash in the first session destroys Day 1 retention
Target: crash-free sessions > 99.5% | crash-free users > 99%
Tools
| Tool | What it provides | Setup |
|---|---|---|
| Firebase Crashlytics | Real-time crashes, ANRs, symbolicated stack traces | Add FirebaseCrashlytics pod/SPM package |
| App Store Connect | Crash rate trend, crashes per session | Built-in, no code needed |
| Xcode Organizer | Aggregated crash logs from TestFlight + App Store | Xcode → Window → Organizer → Crashes |
| MetricKit | On-device diagnostics, hang rate, launch time | iOS 13+, automatic |
Recommended: Crashlytics (real-time alerts + search) + App Store Connect (trend validation)
Crashlytics Setup
iOS (Swift)
// AppDelegate or @main App struct
import FirebaseCore
import FirebaseCrashlytics
@main
struct MyApp: App {
init() {
FirebaseApp.configure()
// Crashlytics is auto-initialized
}
}
Non-fatal errors (track without crashing)
// Log a non-fatal error
Crashlytics.crashlytics().record(error: error)
// Log a custom key for debugging context
Crashlytics.crashlytics().setCustomValue(userId, forKey: "user_id")
Crashlytics.crashlytics().setCustomValue(screenName, forKey: "current_screen")
Android (Kotlin)
// build.gradle (app)
implementation("com.google.firebase:firebase-crashlytics:18.x.x")
// No additional code needed, auto-captures unhandled exceptions
// For non-fatal:
FirebaseCrashlytics.getInstance().recordException(throwable)
