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Screenshots

  • Comtrade Viewer screenshot 1
  • Comtrade Viewer screenshot 2
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About Comtrade Viewer

COMTRADE Viewer is an easy-to-use tool for viewing and analyzing power system event records. Display waveforms directly on your device. Now includes incremental based double-ended fault locator based on method of Kasztenny and Smelich. Supported file formats include: • COMTRADE (ASCII and Binary) • SEL .cev, .eve, and .evzip event records • SEL Motor Start Reports (.msr and .cmsr) • Beckwith M-3425A, M-3430, and M-3311A .osc records • S&C IntelliRupter Fault Interrupter records (.wfc) • ATP/EMTP .pl4 files Open files directly from Mail, Files, AirDrop, and other supported apps, or explore the included sample records to get started. Built for power system engineers and technicians who need quick access to event records while in the field, at the office, or on the go.

What’s new

Version 2.4.8 (48) · Updated October 11, 2026

Minor UI improvements. Added smooth interpolation for low-sample-rate waveforms, an option to show sample points, and improved frequency accuracy at record edges.

App privacy

The developer, Russell Patterson, reported these privacy practices to Apple.

Data Not Collected

The developer does not collect any data from this app.

Alternatives to Comtrade Viewer

Looking for apps like Comtrade Viewer? Here are 6 similar apps on the App Store. The highest rated is CMC Swift (5.0/5), and 5 of the 6 are free to download.

Comtrade Viewer vs. alternatives
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Comtrade Viewer – Free October 11, 2026
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