# Spectrum vs FlickerCheck

The clearest difference is price: FlickerCheck at Free against Spectrum's $5.99. Spectrum's advantage is in-app purchases (none vs 1) and update cadence (every 2 weeks vs every 2 months). On ads there is nothing between them.

FlickerCheck is free to download; Spectrum costs $5.99 up front. FlickerCheck sells 1 one-off in-app purchase. Spectrum asks for nothing beyond the download.

Spectrum ships an update every 2 weeks, FlickerCheck every 2 months. The most recent releases landed on November 7, 2026 and November 10, 2026 respectively.

## The numbers

| Metric | Spectrum | FlickerCheck |
| --- | --- | --- |
| Price | $5.99 | **Free** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 2 months |
| Monetization | — | Free with in-app purchases |
| Size | 10 MB | 10 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 9+ |
| Developer | [Victor Serov](https://appshunter.io/developer/1635616731) | [biaopeng zhou](https://appshunter.io/developer/1895904365) |

## What reviewers say

### Spectrum

[App page](https://appshunter.io/ios/app/spectrum-v-audio-analyzer/id6450556284)

**Features:** Vision Pro support

**In-app purchases:** none


### FlickerCheck

[App page](https://appshunter.io/ios/app/flickercheck-pwm-meter/id6804622251)

This utility uses your iPhone camera to detect brightness flicker from screens and lights. It analyzes variations and provides a clear assessment of flicker levels, estimated frequency, and modulation depth. Results can be saved locally for comparison.

**Highlights:** Screen and light testing modes, Automatic signal-quality guidance, Flicker level assessment, Estimated frequency and modulation depth, Captured signal waveform, Save and compare results locally, On-device camera processing

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime Pro | $4.99 | one-time |


## Frequently asked questions

### Is Spectrum free?

Spectrum costs $5.99, with no in-app purchases.

### Is FlickerCheck free?

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

### Do Spectrum or FlickerCheck have ads?

Neither Spectrum nor FlickerCheck shows ads.

### Which is updated more often, Spectrum or FlickerCheck?

Spectrum ships an update every 2 weeks, and FlickerCheck every 2 months. Most recently, Spectrum was updated on November 7, 2026 and FlickerCheck on November 10, 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.*