Understand What Changed — And Why It Broke
A firmware update introduced random reboots. An OTA broke camera startup. A new driver version causes thermal shutdowns. Delta compares logs across versions, devices, and builds to isolate exactly what changed.
Regression Detection, Not Just Diffing
Delta isn't a log diff tool. It's the comparison engine that answers: what changed between the build that worked and the build that didn't?
Upload logs from two versions, two devices, or two test runs. Delta indexes everything, aligns timestamps, cross-references events across layers, and identifies the behavioral differences that matter — new errors, missing events, timing shifts, changed system state.
See It In Action
Watch Delta correlate events across multiple log files in real time
Delta Correlation Engine
Multi-file cross-layer analysis
Why Comparison Matters
The most impactful bugs are the ones that appeared after a change
The Root Cause Spans Multiple Logs
The kernel log says 'driver timeout,' the logcat shows 'service unavailable,' the bugreport shows a timing anomaly. Only cross-file comparison reveals they're the same issue.
Manual Correlation Doesn't Scale
Engineers spend hours aligning timestamps across files, mentally mapping events, and searching for cause-effect chains. With 50MB+ files, critical connections get missed.
Symptoms vs Root Causes Live in Different Layers
The app ANR is visible in logcat. The thermal throttling that caused it is in dmesg. The GPU driver bug behind both is in the bugreport. You need all three views at once.
Regressions Are Invisible Without a Baseline
The difference between 'working' and 'broken' is often a single new error, a timing shift, or a missing heartbeat event. Automated comparison catches what manual review can't.
Flexible by Design
Delta adapts to any comparison scenario — upload any combination of log files and let Delta figure out the connections
Cross-Layer Correlation
Upload multiple log files — logcat, dmesg, bugreport sections — and Delta finds related events across system layers. See how a low-level kernel event connects to a framework error and ultimately an app crash.
Regression Detection
Compare logs from two software versions on the same device. Delta identifies what changed — new errors, timing shifts, missing events — so you know exactly what the update broke.
Device-to-Device
Same software, different hardware. Upload logs from Device A and Device B to find device-specific behaviors, hardware quirks, or configuration differences.
Before/After Analysis
Compare logs from before and after a system update, configuration change, or firmware update to isolate the exact impact of the change.
Multi-Source Investigation
Combine bugreport + kernel dmesg + logcat to build a complete picture. The more context you provide, the better the AI can trace cause-effect chains.
Field Test Comparison
Compare field test logs from different locations, times, or conditions. Identify environment-specific issues, time-of-day patterns, or configuration-specific behaviors.
How Delta Compares
AI-powered comparison that understands system behavior, not just text
Timeline Alignment
Automatically synchronize timestamps across files, even when they use different formats or clock sources. See events in true chronological order.
Behavioral Difference Detection
Delta doesn't just find text differences — it identifies behavioral changes: new errors that appeared, events that stopped occurring, timing shifts, and changed system state.
Powered by Deep Research
Ask questions that span all uploaded files. The same autonomous investigation engine traces root causes across every log in your comparison.
Shareable Results
Share your Delta analysis via link with team members, vendors, or support teams. Everyone sees the same correlated view — no account required.
How Delta Works
Four simple steps from upload to insight
Upload Your Files
Upload two or more log files — any combination of logcat, dmesg, bugreport, vendor tool exports, or other plaintext logs.
AI Indexes Everything
Delta processes all files, extracts events, aligns timestamps, and builds a unified searchable index across all your logs.
Ask Your Question
Ask anything — 'why did the app crash?', 'what changed between these versions?', 'is the kernel panic related to the framework error?'
Get Correlated Answers
Delta searches across all files, finds cross-references, and delivers a unified answer with evidence from every relevant source.
Who Uses Delta
Delta serves engineers across every vertical and every stage of the development lifecycle
Device & Platform Engineers
Compare bugreports across BSP versions, correlate kernel logs with framework crashes on phones, tablets, and IoT devices.
Telecom Engineers
Diff modem diagnostic traces before and after firmware updates, correlate NAS/RRC events with RIL logs to isolate call drops and registration failures.
Automotive Engineers
Compare CAN bus traces across ECU firmware versions, correlate VHAL events with IVI bugreports to trace vehicle software regressions.
QA & Release Teams
Compare logs from passing vs. failing test runs across any device type or vertical. Detect regressions by identifying exactly what changed between software versions.
Real Example: OTA Introduces Random Reboots
A device manufacturer sees reboot reports spike after firmware v4.1.2. Delta isolates the change.
- 1Upload bugreport from v4.1.1 (stable) and v4.1.2 (rebooting)
- 2Delta aligns timestamps and indexes both files across kernel, framework, and app layers
- 3Identifies new thermal_shutdown events in v4.1.2 dmesg that don't exist in v4.1.1
- 4Traces to changed thermal mitigation policy: new aggressive CPU throttling thresholds
- 5Cross-references with framework logs showing watchdog timeouts caused by throttled system_server
- ✓Root cause: thermal policy change in v4.1.2 triggers emergency CPU throttle → system_server watchdog → reboot. Fix: adjust thermal thresholds.
Found a regression? Investigate the root cause.
Delta tells you what changed. Deep Research tells you why it happened. Use them together for the complete debugging workflow.
Frequently Asked Questions
Common questions about Delta comparison
Delta supports comparing two or more files simultaneously. The more context you provide, the better the AI can correlate events and identify patterns across sources.
Delta supports any plaintext log format — logcat, dmesg, bugreport, vendor tool exports, and any other human-readable log files. You can mix and match different formats in a single comparison.
No. You can compare logs from different devices, different software versions, or even different platforms. Delta is flexible — use it for device-to-device comparison, regression detection, or any multi-source investigation.
Yes. Delta handles logs from different time periods. This is useful for before/after comparisons, regression detection across builds, and comparing field test logs from different sessions.
Upload logs from a 'working' version and a 'broken' version. Delta identifies differences — new errors that appeared, events that stopped occurring, timing changes, and behavioral shifts — helping you pinpoint exactly what the update broke.
Yes. Delta automatically detects and normalizes timestamp formats across files, aligning events chronologically even when files use different date/time formats or clock sources.
Yes. All files are processed in isolated environments, encrypted at rest and in transit, and never shared between users. Your comparison data is private to your account.
Stop guessing what changed. Start knowing.
Upload logs from two builds and let Delta isolate the regression in minutes