# Sorphase: SOR & OTDR — Compare Traces & Save Setups

> Compare Traces & Save Setups (iPhone/iPad app by Robert Corbin.)

- Source: https://appshunter.io/ios/app/sorphase-sor-and-otdr/id6793301605 (this page in markdown: same URL + `.md`)
- Developer: [Robert Corbin](https://appshunter.io/developer/1890247992)
- Category: Utilities, Productivity
- Price: $3.99
- Age rating: 4+
- Requires: iOS 17.0 · 4 MB
- Released: 2026-08-03
- Data updated: 2026-11-06

## What is Sorphase?

OPEN A TRACE. BUILD A COMPARISON. KEEP THE SETUP.
Inspect recorded OTDR data on iPhone and iPad, offline and without an account.

NEW IN 5.0
• Start from an actual trace and find comparison candidates by direction, wavelength and recorded identity. The guided flow explains exclusions and asks you to confirm the physical fiber.
• Save named comparison setups with selected originals, trace settings, thresholds, distance unit and overlay alignment. Reopen a setup to calculate again; missing or changed inputs are flagged rather than silently substituted.
• Include saved setups in library backups. Restore independent copies with their original files. Version 5 reads older backups; new version 2 backups require version 5 or later.
• Clearer import access and safer handling of overlapping imports, queued results and checksum retries.

YOUR TRACE WORKBENCH
Import SR-4731 .sor files from Files or the share sheet. Group them into cable/project jobs, record technician notes, and keep byte-for-byte copies on your device.

Inspect stored samples with zoom, A–B cursors, two-point loss, least-squares attenuation and event-loss estimates. Review instrument event codes, supplier information and file diagnostics. Export trace and bidirectional PDF reports, cable summaries, event-table CSV, every measured sample, or the original SOR file.

Compare compatible opposite-direction traces at the same wavelength. Overlay up to six traces; select exactly two of the same fiber and direction at different wavelengths for bend screening. Coverage, unmatched events and unsuitable pairs are explained. A possible bend is an indicator, not a diagnosis.

Use preset or custom thresholds for splice loss, connectors, reflectance, attenuation, link loss and ORL. Calculate a component loss budget manually or prefill estimates from valid instrument loss markers. Verify inferred component counts against your design. The loss-budget calculator is also available through Shortcuts and Siri.

Choose km, m, ft or mi. Adjust group index and view a helix-adjusted loss-marker span. End-of-fiber position, marker span and physical cable length are not interchangeable.

WHAT TO KNOW
Supports binary SR-4731 issue 1 and 2 files with one pulse width and one standard data group, up to 16 MB and one million samples. Multi-pulse files, vendor containers and text exports are unsupported. Event loss and reflectance come from the instrument. The app is an interpretation aid, not an instrument calibration or link certification.

Backups accept up to 64 MB, 40 MB of original trace data, 256 traces and 256 jobs. An unreadable library index is preserved and editing is disabled; a backup cannot repair that index automatically. Keep independent copies of important originals and backups.

Five clearly labeled synthetic traces let you explore the tools. No account, subscription, in-app purchase, ads or analytics. Traces and notes remain on device unless you choose to export or share them. Shared files can contain site and instrument information.

The app interface and screenshots are in English. Translated store listings do not change the interface language.

## Is Sorphase safe?

Not enough ratings yet to assess Sorphase.

## Is Sorphase legit?

Sorphase: SOR & OTDR appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for Sorphase is 65 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 5 releases)

### 5.0 — 2026-11-04

Guided comparison from an imported trace. Named comparison setups with captured settings, changed-input checks and backup support. Corrected overlapping-import status, queued results and checksum-retry destinations. Safer comparison reloads and report identity, plus numeric-setting validation. Interface remains English.

### 4.0 — 2026-11-01

Portable job and library backups with checked restore-as-copies. Search and filter your trace library. Safer saves and original-file integrity checks. Clearer missing-file and comparison-coverage messages. Corrected loss-marker spans, qualified pass/fail assessment, improved PDF pagination and large-text layouts.

### 3.0.2 — 2026-10-06

Small improvements and fixes.

### 3.0.1 — 2026-10-05

Added App Store listings in more languages. No changes to the app itself.

### 3.0 — 2026-09-28

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.

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All apps by Robert Corbin: https://appshunter.io/developer/1890247992

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-11-06.*