# Flicker Meter for Light vs OSpectrometer

The clearest difference is review sentiment: Flicker Meter for Light at 62% against OSpectrometer's 0%. Flicker Meter for Light also leads on rating (4.6 vs 2.0) and ratings volume (48 vs 4). OSpectrometer's advantage is update cadence (every 2 weeks vs every 2 months). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Flicker Meter for Light sells 4 in-app purchases, starting at $0.99 per month and OSpectrometer sells 2 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

Flicker Meter for Light holds the better App Store score, 4.6 against 2.0. That said, the two scores are not equally well evidenced: Flicker Meter for Light has 48 ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 62% of Flicker Meter for Light's written reviews are positive against 0% of OSpectrometer's.

Flicker Meter for Light ships an update every 2 months, OSpectrometer every 2 weeks. The most recent releases landed on October 17, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Flicker Meter for Light | OSpectrometer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (48 ratings)](https://appshunter.io/ios/app/flicker-meter-for-light-pwm/id1672848632/reviews)** | [2.0 (4 ratings)](https://appshunter.io/ios/app/ospectrometer/id6446124449/reviews) |
| Number of ratings | **48** | 4 |
| Positive reviews | **62.1% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 43 MB | 71 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Contechity AB](https://appshunter.io/developer/1649290454) | [NANO ELECTRONICS RESEARCH MUHENDISLIK ARASTIRMA GELISTIRME LIMITED SIRKETI](https://appshunter.io/developer/1674573382) |

## What reviewers say

### Flicker Meter for Light

[App page](https://appshunter.io/ios/app/flicker-meter-for-light-pwm/id1672848632)

Detect and measure invisible high-frequency flickering in LED lights and screens that can cause eye strain and headaches. Find flicker-free alternatives to improve your comfort and health.

**Highlights:** Detect invisible high-frequency flickering, Measure flicker intensity (%), Measure flicker frequency (Hz), Identify flicker-free light sources, Easy-to-use interface, Instant results

**Features:** Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full access | $0.99 | per month |
| Full access | $4.99 | per year |
| Full access | $6.99 | one-time |
| Full access | $9.99 | one-time |


### OSpectrometer

[App page](https://appshunter.io/ios/app/ospectrometer/id6446124449)

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:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| month | $2.99 | per month |
| year | $9.99 | per year |


## Frequently asked questions

### Is Flicker Meter for Light free?

Flicker Meter for Light is free to download, with in-app purchases available.

### Is OSpectrometer free?

OSpectrometer is free to download, with in-app purchases available.

### Which has better reviews, Flicker Meter for Light or OSpectrometer?

Flicker Meter for Light is rated higher. Flicker Meter for Light averages 4.6 out of 5 from 48 ratings, while OSpectrometer averages 2.0 from 4 ratings.

### Do Flicker Meter for Light or OSpectrometer have ads?

Neither Flicker Meter for Light nor OSpectrometer shows ads.

### Which is updated more often, Flicker Meter for Light or OSpectrometer?

Flicker Meter for Light ships an update every 2 months, and OSpectrometer every 2 weeks. Most recently, Flicker Meter for Light was updated on October 17, 2026 and OSpectrometer on October 15, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*