Comparison

Photonics Spectra vs Semi Dig

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Photonics Spectra

Access the leading magazine for the photonics industry on your mobile device. Read articles in a convenient format, download PDF issues, and search through archives of past content. Stay informed about optics, lasers, imaging, and more.

Highlights
  • Mobile-friendly article reading
  • Downloadable PDF issues
  • Searchable archives
  • Comprehensive industry coverage
  • Technical and practical information
Features
Read full description

Photonics Spectra, the world's leading magazine covering the photonics industry, is also available as a mobile app. Features include the ability to: • Read articles in a mobile-friendly format • Download a pdf of each issue • Search archived issues Since 1967, Photonics Spectra magazine has defined the science and industry of photonics, promoting an international dialogue among the engineers, scientists, and end users who develop, commercialize, and buy photonic products. Photonics Spectra is unique in that it provides both technical and practical information for every aspect of the global industry, integrating all segments of photonics: optics, lasers, imaging, spectroscopy, sensors and detectors, fiber optics, microscopy, displays, light sources, machine vision, and more. This application is powered by GTxcel, a leader in digital publishing technology, provider of hundreds of online digital publications and mobile magazine apps.

About

Semi Dig

Features
Read full description

Semi Dig — your semiconductor manufacturing resource. Semi Dig is the app for the Semiconductor Digest website and magazine. Semiconductor Digest’s readers are engineers and business managers involved in the worldwide semiconductor manufacturing, design and packaging operations. Our news and tech articles provide them with the tools they need to do their jobs more efficiently. Our app provides easy access to the latest information and other relevant resources. Semiconductor Digest magazine is published 8 times a year and is a great source for exclusive in-depth semiconductor industry articles. In addition to a resourceful website, Semiconductor Digest publishes a daily newsletter and 6 topical newsletters.

Screenshots

Photonics Spectra4 screens
Semi Dig4 screens

Verdict

The call

Photonics Spectra and Semi Dig are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Photonics Spectra ships an update every 10 months, Semi Dig every 17 months. The most recent releases landed on September 8, 2026 and May 18, 2026 respectively.

ScorecardNo meaningful differences
Photonics Spectra versus Semi Dig: the parameters behind the verdict, then further details
ParameterPhotonics SpectraSemi Dig
PriceFreeFree
Rating5.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyEvery 10 months — betterEvery 17 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.0 — better13.0
Further details — not scored
Size29 MB62 MB
Age rating4+17+
DeveloperLaurin Publishing Co., Inc.Gold Flag Media LLC

In-app purchases

None

Photonics Spectra

No in-app purchases

None

Semi Dig

No in-app purchases

Questions

Is Photonics Spectra free?
Photonics Spectra is free to download, with no in-app purchases.
Is Semi Dig free?
Semi Dig is free to download, with no in-app purchases.
Do Photonics Spectra or Semi Dig have ads?
Neither Photonics Spectra nor Semi Dig shows ads.
Which is updated more often, Photonics Spectra or Semi Dig?
Photonics Spectra ships an update every 10 months, and Semi Dig every 17 months. Most recently, Photonics Spectra was updated on September 8, 2026 and Semi Dig on May 18, 2026.

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