Comparison

Blume LED vs OSpectrometer

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

Head to head
About

Blume LED

Control LEDs connected to a Bluetooth-enabled Arduino clone with your smartphone or tablet. This platform enables custom LED projects using a cross-platform app.

Highlights
  • Bluetooth LED control
  • Arduino project platform
  • Cross-platform app
  • Smartphone/tablet integration
  • Customizable LED projects
Features
Read full description

Blume is a platform for LED projects. It combines Bluno Beetle by DFRobot, a cheap bluetooth-enabled Arduino clone, with a cross-platform Cordova app. This app lets you control LEDs connected to the Beetle with any smartphone or tablet.

About

OSpectrometer

This app uses your device's camera and screen to perform basic optical spectroscopy. Analyze the visible light spectrum of objects, map light wavelengths to RGB values, and save or share your findings. It functions offline without external hardware.

Highlights
  • Visible light spectrum analysis
  • RGB color value mapping
  • Wavelength selection and scanning
  • Front camera reflection sensing
  • Save and share results
  • Offline functionality
Features
Read full description

Optical spectroscopy in the visible light spectrum is a commonly used tool in different fields such as health, manufacturing, art, and forensic research. OSpectrometer implements basic spectrometer functions using the built-in camera and screen without requiring external devices or programs. - Visible light spectrum is transformed and mapped to a function that generates RGB (Red Green Blue) color values - A specific light wavelength can be selected and used to illuminate a desired target (i.e., close to the screen) - The whole spectrum or a specific part of the spectrum can be selected and scanned - Front camera is used to sense the reflection from the target object - Consistent and repeatable reflection/absorption amplitude with respect to the color spectrum - The result can be saved and shared - Works offline, no need to connect to any network or internet Privacy-policy: https://software.nanorescenter.com/osprectrometer-privacy-policy Terms of use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Blume LED2 screens
OSpectrometer4 screens

Verdict

The call

The clearest difference is review sentiment: Blume LED at 100% against OSpectrometer's 0%. Blume LED also leads on rating (5.0 vs 2.0) and in-app purchases (none vs 2). OSpectrometer's advantage is update cadence (every 2 weeks vs every 107 months) and ratings volume (4 vs 1). On price, ads and device support 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. OSpectrometer sells 2 in-app purchases, starting at $2.99 per month. Blume LED asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Blume LED holds the better App Store score, 5.0 against 2.0. Both are backed by a comparable volume of ratings — 1 and 4 respectively. Written reviews point the same way: 100% of Blume LED's written reviews are positive against 0% of OSpectrometer's.

UpkeepUpdate frequency

Blume LED ships an update every 107 months, OSpectrometer every 2 weeks. The most recent releases landed on September 29, 2026 and October 15, 2026 respectively.

Scorecard7 real differences · 3 level
Blume LED versus OSpectrometer: the parameters behind the verdict, then further details
ParameterBlume LEDOSpectrometer
PriceFreeFree
Rating5.0 (1 ratings) — better2.0 (4 ratings)
Positive reviews100.0% of reviews — better0.0% of reviews
Number of ratings14 — better
Update frequencyEvery 107 monthsEvery 2 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.0 — better15.1
Further details — not scored
Size18 MB71 MB
Age rating4+4+
DeveloperGrant PattersonNANO ELECTRONICS RESEARCH MUHENDISLIK ARASTIRMA GELISTIRME LIMITED SIRKETI

Customer experience

Blume LED

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

OSpectrometer

All ratings4 ratings
Positive25.0%
Neutral0.0%
Negative75.0%
Written reviews2 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

None

Blume LED

No in-app purchases

2 purchases

OSpectrometer

Subscriptions2
  • month3 Days trial$2.991 Month
  • year3 Days trial$9.991 Year

Questions

Is Blume LED free?
Blume LED is free to download, with no in-app purchases.
Is OSpectrometer free?
OSpectrometer is free to download, with in-app purchases available.
Which has better reviews, Blume LED or OSpectrometer?
Blume LED is rated higher. Blume LED averages 5.0 out of 5 from 1 ratings, while OSpectrometer averages 2.0 from 4 ratings.
Do Blume LED or OSpectrometer have ads?
Neither Blume LED nor OSpectrometer shows ads.
Which is updated more often, Blume LED or OSpectrometer?
Blume LED ships an update every 107 months, and OSpectrometer every 2 weeks. Most recently, Blume LED was updated on September 29, 2026 and OSpectrometer on October 15, 2026.

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