Sorphase: OTDR Trace Lab
Fiber events, loss & reports
$3.99 · Designed for iPad. Not verified for macOS.
New in 3.0: a trace library by cable, pass/fail against TIA-568.3-D limits, A–B cursors with least-squares loss, bidirectional averaging, bend detection and PDF reports.
Sorphase 3.0 turns your iPhone and iPad into a field-ready OTDR trace workbench. Open standard SR-4731 (.sor) files, keep them organized by cable, judge every event against published limits, average both directions and hand over a clean PDF report — offline, with no account and no subscription.
NEW IN 3.0
- Trace library: import many SOR files at once, or share a .sor file from Files, Mail or AirDrop and choose Sorphase. Byte-for-byte copies are kept on your device and grouped into jobs by cable or project.
- Pass/fail thresholds: presets use ANSI/TIA-568.3-D component limits (0.75 dB per mated connector pair, 0.3 dB per splice, cable attenuation and return loss). Add your own stricter project profile.
- A–B cursors: tap to place cursors, zoom and nudge by one sample. Read distance, two-point loss, least-squares (LSA) attenuation in dB/km and a 4-point LSA event loss.
- Fiber sections: every span between events gets its own least-squares attenuation, plus a length-weighted mean for the link.
- Bidirectional averaging: pair A-to-B and B-to-A traces. Events are matched and averaged with (loss A-to-B + loss B-to-A) / 2, so gainers and exaggerated splice losses cancel out.
- Macrobend check: overlay up to six traces. When 1310 and 1550 nm (or other wavelength pairs) are loaded, events whose loss rises by more than your threshold at the longer wavelength are flagged.
- Cable summary: see pass/fail, length, loss, worst splice and worst reflectance for every fiber in a job. Export it as PDF or CSV.
- PDF reports: trace plot, event table with results, fiber sections, link summary, identification and the method used. Share or save from the built-in preview.
- Decoded file details: cable and fiber IDs, locations A and B, operator, fiber type, build condition, instrument and software from the file. Event codes are decoded too: reflective or not, found or added, end of fiber, loss technique.
- Wider file support: SR-4731 revision 1 and revision 2 layouts. The CRC-16/XMODEM checksum variant written by some instruments is verified as well as the standard CRC-16/CCITT.
- Units and corrections: kilometres, metres, feet or miles. Change the group index (IOR) to rescale every distance, and apply a helix factor to convert fiber length into cable length.
- Loss budget calculator: length x attenuation + connectors + splices + other, with an optional power budget and margin. Fill it from a trace and compare it with the measured total loss. Also available as a Shortcuts and Siri action.
- Sample job: five clearly labelled synthetic traces let you try every tool before you import your own files.
STILL AT THE CORE
- Stored samples plotted with min/max buckets, so narrow reflections stay visible. CSV export keeps every sample.
- File integrity is checked. A file with an unrecognized checksum opens only after you confirm, and stays marked unverified in the app and in reports.
- The import diagnostics list every block, the source SHA-256 and the reader notes.
WHAT TO KNOW
Sorphase reads binary SR-4731 files with one pulse width and one standard data group, up to 16 MB and one million samples. Multi-pulse files, vendor container formats and text exports are not supported. Event loss and reflectance are the instrument's stored values. Sorphase adds standards-based calculations (least-squares fits, bidirectional averages, loss budgets) and shows each formula in the app. It is an interpretation aid: it does not calibrate instruments and does not certify links.
PRIVATE BY DESIGN
No accounts, analytics, advertising or tracking. Traces stay on your device until you export or share them yourself.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Sorphase 3.0 is a major upgrade for fiber technicians:
- Trace library: import many SOR files at once or open them from Files, Mail and AirDrop. Traces are kept on your device and grouped into jobs by cable.
- Pass/fail against ANSI/TIA-568.3-D limits (connector 0.75 dB, splice 0.3 dB, attenuation, reflectance), or against your own project profile.
- A–B cursors with two-point loss, least-squares attenuation and 4-point event loss, plus zoom, pan and one-sample nudges.
- Least-squares attenuation for every fiber section between events.
- Bidirectional averaging of A-to-B and B-to-A traces, with gainers identified.
- Overlay up to six traces, with a dual-wavelength macrobend check.
- Cable summary for each job, exportable as PDF or CSV.
- PDF trace reports with a preview, plus event-table CSV.
- Decoded cable, fiber, location, operator and instrument details, and decoded SR-4731 event codes.
- SR-4731 revision 1 files and the CRC-16/XMODEM checksum variant are now supported.
- Distances in km, m, ft or mi, a group index (IOR) override and a helix factor for cable length.
- Loss budget calculator with an optional power budget, and a Shortcuts/Siri action.
- A labelled synthetic sample job for trying every tool.
The developer, Robert Corbin, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Robert Corbin
- Size
- 3.7 MB
- Category
- Utilities
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Age Rating
4+
- 4+
- Copyright
- © 2026 Robert Corbin
