Comtrade Viewer Release History

Major features and enhancements for iOS and Android.

Latest Release

iOS 2.2.3 / Android 3.2.3
June 19, 2026
  • Added support for opening ZIP files containing multiple records of any supported type.
  • Users can browse the contents of the archive and select the specific record to view.
  • Makes it easy to bundle related event records into a single compressed file for sharing through Mail, Gmail, Files, Drive, AirDrop, or local storage.

2026 Releases

iOS 2.2.2 / Android 3.2.2
June 5, 2026
  • Added support for SEL event records (.cev, .eve, .evzip).
  • Added SEL Motor Start Reports (.msr, .cmsr).
  • Added Beckwith M-3425A, M-3430, and M-3311A OSC records.
  • Added S&C IntelliRupter waveform capture files (.wfc).
  • Added ATP/EMTP PL4 support.
iOS 2.1.1 / Android 3.2.1
May 24-25, 2026
  • Fixed SEL-735 compatibility issues.
  • Added direct links to online Help.
  • Android: Fixed gesture navigation issue.
iOS 2.1.0 / Android 3.2.0
May 19, 2026
  • Added phasor diagrams.
  • Added symmetrical components calculations.
  • Added R-X impedance plane plotting of loop impedances.
iOS 2.0.0 / Android 3.0.0
May 11-12, 2026
  • Major modernization of both applications.
  • Direct file imports from mail, cloud storage, and local files.
  • Support for COMTRADE, CFF, Beckwith OSC, and ATP/EMTP PL4 formats.
  • Bundled sample records.
  • Improved plotting, cursor functions, and user interface.

Earlier Releases

The original iOS releases (2019) introduced COMTRADE support, binary COMTRADE support, chart management improvements, and fundamental-frequency phasor displays. Android was first released in September 2019.

Questions, bug reports, and feature suggestions: feedback@comtradeviewer.org
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