Comparison

Fluorescence SpectraViewer vs Thorlabs Toolkit

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

Head to head
About

Fluorescence SpectraViewer

This app allows users to plot and compare fluorescent spectra, check spectral compatibility for various fluorophores, and email configurations. It serves as a mobile extension of an online tool for biological applications.

Highlights
  • Plot and compare fluorescent spectra
  • Check spectral compatibility
  • Add emission and excitation filters
  • Email configurations and figures
  • Search extensive fluorophore list
  • Mobile-friendly interface
Features
Read full description

Plot and compare spectra, check the spectral compatibility for many fluorophores and email the configuration to yourself or others in the lab in a clear printable format. This mobile SpectraViewer acts as an extension of our online SpectraViewer tool which can be found at www.thermofisher.com/spectraviewer. Highlights: -View and compare fluorescent proteins and dyes for biological applications -Add up to 5 emission and 5 excitation filters per plot -Email settings and figures directly to your inbox in a clear printable format -Mobile friendly display and user interface for simple setup -Easily search our extensive list of fluorophores

About

Thorlabs Toolkit

Features
Read full description

Get convenient access to photonics calculators, equations, and other information and resources when you download this free app! This application is being continually updated to offer new types of resources, as well as to expand existing categories, so be sure to check for updates. The current version of the app includes a collection of calculators that engineers and technicians at Thorlabs Lens Systems and elsewhere have used on the floor for over 15 years. Each calculator page includes the equations used in the calculations, as well as usage notes and information about assumptions included in the equations. Additional resources include brief summaries of ray tracing, lens theory, Snell’s Law, manufacturing tolerances, and evaluation of system resolution using the modulation transfer function (MTF). History Thorlabs Toolkit builds on the excellent foundation provided by the JML Optical Calculator. When JML Optical joined Thorlabs’ family as Thorlabs Lens Systems, it provided a wonderful opportunity to expand the app to share knowledge collected from across all of Thorlabs.

Screenshots

Fluorescence SpectraViewer2 screens
Thorlabs Toolkit4 screens

Verdict

The call

The clearest difference is iOS requirement: Fluorescence SpectraViewer at 9.0 against Thorlabs Toolkit's 13.0. On price, update cadence, ads and in-app purchases there is nothing between them.

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

Both ship on a similar rhythm, roughly every 4 months. The most recent releases landed on October 29, 2026 and October 25, 2026 respectively.

Scorecard1 real difference · 9 level
Fluorescence SpectraViewer versus Thorlabs Toolkit: the parameters behind the verdict, then further details
ParameterFluorescence SpectraViewerThorlabs Toolkit
PriceFreeFree
Rating2.6 (11 ratings) — better—
Positive reviews25.0% of reviews—
Number of ratings11 — better—
Update frequencyEvery 4 monthsEvery 4 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS9.0 — better13.0
Further details — not scored
Size9 MB30 MB
Age rating4+4+
DeveloperThermo Fisher ScientificThorlabs, Inc.

In-app purchases

None

Fluorescence SpectraViewer

No in-app purchases

None

Thorlabs Toolkit

No in-app purchases

Questions

Is Fluorescence SpectraViewer free?
Fluorescence SpectraViewer is free to download, with no in-app purchases.
Is Thorlabs Toolkit free?
Thorlabs Toolkit is free to download, with no in-app purchases.
Do Fluorescence SpectraViewer or Thorlabs Toolkit have ads?
Neither Fluorescence SpectraViewer nor Thorlabs Toolkit shows ads.
Which is updated more often, Fluorescence SpectraViewer or Thorlabs Toolkit?
Fluorescence SpectraViewer ships an update every 4 months, and Thorlabs Toolkit every 4 months. Most recently, Fluorescence SpectraViewer was updated on October 29, 2026 and Thorlabs Toolkit on October 25, 2026.

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