Device Recording Compare Desk
GPX 1.1 and TCX v2; timestamp alignment, gaps and source-preserving charts.
Loading your tools…
Projects stay in this browser. Save a backup before changing devices. Use the export format offered by each tool.
From your inputs to a usable result
01
Keep original device recordings
Import UTF-8 GPX 1.1 or TCX v2 files. Select the exact track, activity or course while retaining every original file and its SHA-256.
02
Align timestamps explicitly
Choose A and B, recorded metric, pairing tolerance and gap threshold. Apply any known clock correction without changing the original timestamps.
03
Review differences and export evidence
Inspect original-sample charts, paired/unmatched points and gaps. Export complete CSV reports, SVG, audit notes, source ZIP or a JSON project backup.
Before you start
Where is my project saved?
Projects are saved in this browser for this site account. Download a JSON backup before changing devices or clearing browser storage.
Is an AI account required?
No. The text transformations and inspections run in your browser. The app does not send text to an AI service.
Will my original text be replaced?
The tool keeps the source in the project and shows a separate preview. Export the preview only after checking it.
Does this tell me which device is accurate?
No. Neither recording is a ground-truth reference. Differences describe the selected exported values and the stated pairing rule.
Are missing values filled or tracks smoothed?
No. Missing readings, timestamps and gaps remain explicit. Chart lines break at source boundaries and discontinuities; no interpolation or resampling is performed.
Do clock corrections modify the original files?
No. They affect only the comparison timeline. Original UTF-8 XML and timestamps are retained with a SHA-256.
Do filters remove records from downloads?
No. Point CSV retains all selected streams and alignment CSV retains the A/B comparison. ZIP includes every original file, including unselected streams and unsupported extensions.
Can I resume later?
Reopen the saved project on this browser and account, or restore its JSON backup. Keep backups in a place you trust because they include your supplied material.