charleswiltgen App Store Connect Reference
Overview
App Store Connect (ASC) provides crash reports, TestFlight feedback, and performance metrics for your apps. This reference covers how to navigate ASC to find and export crash data for analysis.
ASC vs Xcode Organizer
| Task | Best Tool |
|---|---|
| Quick crash triage during development | Xcode Organizer |
| Team-wide crash visibility | App Store Connect |
| TestFlight feedback with screenshots | App Store Connect |
| Historical metrics and trends | App Store Connect |
| Downloading crash logs for analysis | Either (ASC has better export) |
| Symbolication | Xcode Organizer |
Navigating to Crash Data
Path to Crashes
App Store Connect
└── My Apps
└── [Your App]
└── Analytics
└── Crashes
Direct URL pattern: https://appstoreconnect.apple.com/analytics/app/[APP_ID]/crashes
Crashes Dashboard Sections
- Filters bar — Platform, Version, Date Range, Compare
- Crash-Free Users graph — Daily percentage trend line
- Crash Count by Version — Bar chart comparing versions
- Top Crash Signatures — Ranked by share percentage, shows exception type and function name
Key Metrics Explained
| Metric | What It Means |
|---|---|
| Crash-Free Users | Percentage of daily active users who didn't experience a crash |
| Crash Count | Total number of crash reports received |
| Crash Rate | Crashes per 1,000 sessions |
| Affected Devices | Number of unique devices that crashed |
| Crash Signature | Grouped crashes with same stack trace |
Filtering Options
| Filter | Use Case |
|---|---|
| Platform | iOS, iPadOS, macOS, watchOS, tvOS |
| Version | Drill into specific app versions |
| Date Range | Last 7/30/90 days or custom range |
| Compare | Compare crash rates between versions |
| Device | Filter by iPhone model, iPad, etc. |
| OS Version | Find OS-specific crashes |
Viewing Individual Crash Reports
Crash Signature Detail
Each crash signature shows:
- Header — Exception type and affected device/crash share counts, first seen date
- Exception Information — Type (e.g., EXC_BAD_ACCESS), codes, address
- Crashed Thread — Stack frames with binary, function, and offset
- Distribution — Breakdown by iOS version and device model
Downloading Crash Logs
- Click on a crash signature
- Look for Download Logs button (top right)
- Select format:
- .ips (JSON format, iOS 15+)
- .crash (text format, legacy)
- Use
crash-analyzeragent to parse:/axiom:analyze-crash
TestFlight Feedback
Path to Feedback
App Store Connect
└── My Apps
└── [Your App]
└── TestFlight
└── Feedback
Feedback Entry Contents
Each feedback submission includes:
| Field | Description |
|---|---|
| Screenshot | What the tester saw (often most valuable) |
| Comment | Tester's description of the issue |
| App Version | Exact TestFlight build number |
| Device Model | iPhone 15 Pro Max, iPad Air, etc. |
| OS Version | iOS 17.2.1, etc. |
| Battery Level | Low battery can affect behavior |
| Available Disk | Low disk can cause write failures |
| Network Type | WiFi vs Cellular |
| Locale | Language and region settings |
| Timestamp | When submitted |
Feedback Filtering
| Filter | Use Case |
|---|---|
| Build | Focus on specific TestFlight builds |
| Date | Recent feedback first |
| Has Screenshot | Find visual issues quickly |
Limitation: No Reply
TestFlight feedback is one-way. You cannot respond to testers through ASC. For follow-up:
- Contact through TestFlight group email
- Add in-app feedback mechanism
- Include your email in TestFlight notes
Metrics Dashboard
Path to Metrics
App Store Connect
└── My Apps
└── [Your App]
└── Analytics
└── Metrics
Available Metrics Categories
| Category | What It Shows |
|---|---|
| Crashes | Crash-free users, crash count, top signatures |
| Hang Rate | Main thread hangs > 250ms |
| Disk Writes | Excessive disk I/O patterns |
| Launch Time | App startup performance |
| Memory | Peak memory usage, terminations |
| Battery | Energy usage during foreground/background |
| Scrolling | Scroll hitch rate |
Terminations (Non-Crash Kills)
The Metrics dashboard shows terminations that don't produce crash reports:
| Termination Type | Cause |
|---|---|
| Memory Limit | Jetsam killed app for memory pressure |
| CPU Limit (Background) | Exceeded background CPU quota |
| Launch Timeout | App took too long to launch |
| Background Task Timeout | Background task exceeded time limit |
Comparing Versions
Use the Compare filter to see:
- Did crash rate improve or regress?
- Which version introduced a spike?
- Performance trends over releases
Exporting Data
Manual Export
- Navigate to Crashes or Metrics
- Use date range filter to select period
- Click Export (if available) or download individual crash logs
App Store Connect API
For automated export, use the App Store Connect API:
# Get crash diagnostic insights
GET /v1/apps/{id}/perfPowerMetrics
# Authentication requires API key from ASC
# Users and Access → Keys → App Store Connect API
API capabilities:
| Endpoint | Data |
|---|---|
perfPowerMetrics |
Performance and power metrics |
diagnosticSignatures |
Crash signature aggregates |
diagnosticLogs |
Individual crash logs |
betaTesters |
TestFlight tester info |
betaFeedback |
TestFlight feedback entries |
MCP-Powered Access
If asc-mcp is configured, you can access ASC data programmatically from Claude Code:
| Manual ASC Action | asc-mcp Tool |
|---|---|
| View crash metrics | metrics_app_perf, metrics_build_diagnostics |
| Download crash logs | metrics_get_diagnostic_logs |
| List TestFlight testers | builds_get_beta_testers |
| View app reviews | reviews_list, reviews_stats |
| Respond to reviews | reviews_create_response |
| Check build status | builds_get_processing_state |
| Export sales data | analytics_sales_report (requires vendor_number) |
Setup and workflows: /skill axiom-asc-mcp
Xcode Cloud Integration
If using Xcode Cloud, crash data integrates with CI/CD:
- View crashes per workflow run
- Compare crash rates between branches
- Automated alerts on crash spikes
Best Practices
Daily Monitoring
- Check crash-free users percentage
- Review any new crash signatures
- Monitor for version-to-version regressions
Crash Triage Priority
| Priority | Criteria |
|---|---|
| P0 - Critical | >1% of users affected, data loss risk |
| P1 - High | >0.5% affected, user-facing impact |
| P2 - Medium | <0.5% affected, workaround exists |
| P3 - Low | Rare, edge case, no impact |
Correlating with Releases
After each release:
- Wait 24-48 hours for crash data to populate
- Compare crash-free rate to previous version
- Investigate any new top crash signatures
- Check TestFlight feedback for user reports
Common Questions
Why don't I see crashes in ASC?
| Cause | Fix |
|---|---|
| Too recent | Wait 24 hours for processing |
| No users yet | Need active installs to report |
| User opted out | Requires device analytics sharing |
| Build not distributed | Must be TestFlight or App Store |
Why are crashes unsymbolicated?
ASC crashes should auto-symbolicate if you uploaded dSYMs during distribution. dSYM files contain the debug symbols that map memory addresses back to function names and line numbers.
Verify dSYMs were uploaded:
- Xcode → Window → Organizer → Archives → select build
- Right-click → "Show in Finder" → right-click
.xcarchive→ "Show Package Contents" - Check
dSYMs/folder contains.dSYMbundles
Manual symbolication workflow:
# 1. Download .ips file from ASC (Crashes → signature → Download Logs)
# 2. Find the binary UUID from the crash report
grep --after-context=2 "Binary Images" crash.ips
# Look for: 0x100000000 - 0x100ffffff MyApp arm64 <UUID>
# 3. Locate matching dSYM on your machine
mdfind "com_apple_xcode_dsym_uuids == <UUID>"
# 4. Symbolicate an address
atos -arch arm64 -o MyApp.app.dSYM/Contents/Resources/DWARF/MyApp \
-l 0x100000000 0x100045abc
# Output: -[UserManager currentUser] (UserManager.m:42)
Common symbolication failures:
| Symptom | Cause | Fix |
|---|---|---|
| All addresses unsymbolicated | dSYMs not uploaded | Re-upload from Xcode Organizer |
| Only your code unsymbolicated | dSYM UUID mismatch | Rebuild from same commit |
| System frameworks unsymbolicated | Normal for device-specific | Use atos with device support files |
| Bitcode builds unsymbolicated | Apple recompiled binary | Download dSYMs from ASC: Xcode → Organizer → Download Debug Symbols |
See crash-analyzer agent for automated parsing: /axiom:analyze-crash
ASC vs Organizer: Which stack trace is better?
Both show the same data, but:
- Organizer integrates with Xcode projects (click to jump to code)
- ASC better for team-wide visibility and historical trends
Field Diagnostics with MetricKit
For device-level crash diagnostics, hang call stacks, and custom telemetry beyond ASC's aggregated dashboards, see axiom-metrickit-ref.
Key difference: ASC shows aggregated trends for team visibility. MetricKit provides per-device diagnostics you can correlate with your own telemetry.
Related
Skills: axiom-testflight-triage (Xcode Organizer workflows), axiom-asc-mcp (programmatic ASC access via MCP)
Agents: crash-analyzer (automated crash log parsing)
Commands: /axiom:analyze-crash
Resources
WWDC: 2020-10076, 2020-10078, 2021-10203, 2021-10258
Docs: /app-store-connect/api, /xcode/diagnosing-issues-using-crash-reports-and-device-logs