CenTelum vs OSpectrometer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
CenTelum
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CenTelum provides asset tracking and inventory management using handheld RFID reader.
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.
- Visible light spectrum analysis
- RGB color value mapping
- Wavelength selection and scanning
- Front camera reflection sensing
- Save and share results
- Offline functionality
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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
Verdict
The clearest difference is in-app purchases: CenTelum at none against OSpectrometer's 2. CenTelum also leads on update cadence (every 4 days vs every 2 weeks). On price, ads, device support and iOS requirement 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
Both are free to download. OSpectrometer sells 2 in-app purchases, starting at $2.99 per month. CenTelum asks for nothing beyond the download.
CenTelum ships an update every 4 days, OSpectrometer every 2 weeks. The most recent releases landed on October 30, 2026 and October 15, 2026 respectively.
| Parameter | CenTelum | OSpectrometer |
|---|---|---|
| Price | Free | Free |
| Rating | — | 2.0 (4 ratings) — better |
| Positive reviews | — | 0.0% of reviews |
| Number of ratings | — | 4 — better |
| Update frequency | Every 4 days — better | Every 2 weeks |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 14.1 — better | 15.1 |
| Further details — not scored | ||
| Size | 4 MB | 71 MB |
| Age rating | 4+ | 4+ |
| Developer | Cenango Financial, LLC | NANO ELECTRONICS RESEARCH MUHENDISLIK ARASTIRMA GELISTIRME LIMITED SIRKETI |
In-app purchases
CenTelum
No in-app purchases
OSpectrometer
- month3 Days trial$2.991 Month
- year3 Days trial$9.991 Year
Questions
Is CenTelum free?
Is OSpectrometer free?
Do CenTelum or OSpectrometer have ads?
Which is updated more often, CenTelum or OSpectrometer?
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