Crash rate %
% of sessions that crashed · fatal only 0.00%00:0004:0008:0012:0016:0020:00
Product tour · Epsilon Delta Orion · Mobile app monitoring
Crash and ANR monitoring for Android, iOS and Flutter apps
Orion’s Crash & ANR screen groups every crash and ANR by stack trace, shows the steps a user took before it (History Tracking), and tracks crash-free users for each app version.
Crash / ANR stability, with the path before every issue
“What is breaking, for how many users, in which release?”
- Sample data
- Ending 24 hrs
- All platforms
- All versions
- All types · Open · Most recent
- Total issues
- 1,368
- Fatal
- 9
- Non-fatal
- 0
- ANRs
- 1,358
- OS crashes
- 1
- Hangs
- 0
- iOS
- CPU & disk
- 9
- Affected users
- 5,124
Release health
crash-free sessions by version| Version | Crash-free | Sessions | Crashes |
|---|---|---|---|
| 5.4.1 | 99.99% | 2,893,406 | 4 |
| 5.4.0 | 99.99% | 1,287,078 | 3 |
| 5.3.9 | 99.99% | 135,362 | 2 |
| 5.3.8 | 100.00% | 125,902 | 0 |
Open issues
in selected time range · AI analysis on grouped issues-
ANR
ANR: Main thread Waiting at Unsafe.parkAIMain thread Waiting at jdk.internal.misc.Unsafe.park (busy: AsyncTask #2, flutter-worker-0)141139 users · 7m ago
-
ANR
ANR: Main thread Native at FlutterJNI.nativeInitAIMain thread Native at io.flutter.embedding.engine.FlutterJNI.nativeInit (busy: DefaultDispatcher-worker-2)144139 users · 23m ago
-
ANR
ANR: Main thread Runnable at RoomDatabase$JournalModeMain thread Runnable at androidx.room.RoomDatabase$JournalMode.<init> (busy: AsyncTask #1)11 user · 9m ago
-
CRASH
IllegalStateException in WorkManagerAIandroidx.work.impl.utils.ForceStopRunnable.run44 users · 1h ago
History Tracking
the path one affected user took before the ANR-
App open · cold start 2.9 sAndroid 14 · OnePlus · v5.4.1
-
HomeActivityFirst Paint 46 ms · Fully Drawn 140 ms
-
productListPage · GET /v1/search 1.8 sSlow API call: server 1.1 s, network and app 0.7 s
-
checkoutPage · 4 taps on PayRage click while the button was waiting
-
POST /v2/payment/validate 9.8 sMain thread waiting on the response
-
ANR · main thread blocked 5 sGrouped with 140 similar ANRs · AI analysis attached
Sample data on example domains (shop.example.com). Your dashboard shows your own sites and apps.
What you can see on Crash / ANR
- Crashes and ANRs grouped by stack trace
- Crash-free users for each version
- History Tracking: the user’s path before the issue
- Open, new and resolved issues
Includes what used to be History Tracking, ANR Detection and Crash Detection. Old links redirect here.
Questions about Crash / ANR
What is an ANR?
Application Not Responding. Android shows it when the main thread is blocked for 5 seconds while the user is interacting.
Does History Tracking collect personal data?
[Confirm what History Tracking records and how it is anonymised.]
Last updated 6 Nov 2026 · Reviewed by [Name], [Role]