# Graph Calc Plus vs Flicker Meter for Light

The clearest difference is price: Flicker Meter for Light at Free against Graph Calc Plus's $2.99. Flicker Meter for Light also leads on update cadence (every 2 months vs every 39 months). Graph Calc Plus's advantage is in-app purchases (none vs 4). On ads, device support and iOS requirement there is nothing between them.

Flicker Meter for Light is free to download; Graph Calc Plus costs $2.99 up front. Flicker Meter for Light sells 4 in-app purchases, starting at $0.99 per month. Graph Calc Plus asks for nothing beyond the download.

Graph Calc Plus ships an update every 39 months, Flicker Meter for Light every 2 months. The most recent releases landed on October 7, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | Graph Calc Plus | Flicker Meter for Light |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | — | **[4.6 (54 ratings)](https://appshunter.io/ios/app/flicker-meter-for-light-pwm/id1672848632/reviews)** |
| Number of ratings | — | **54** |
| Positive reviews | — | 62.1% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 39 months | **Every 2 months** |
| Monetization | — | Free with in-app purchases |
| Size | 1 MB | 43 MB |
| Requires iOS | **14.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Heng Jia Liang](https://appshunter.io/developer/1532000635) | [Contechity AB](https://appshunter.io/developer/1649290454) |

## What reviewers say

### Graph Calc Plus

[App page](https://appshunter.io/ios/app/graph-calc-plus/id1612916130)

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is Graph Calc Plus free?

Graph Calc Plus costs $2.99, with no in-app purchases.

### Is Flicker Meter for Light free?

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

### Do Graph Calc Plus or Flicker Meter for Light have ads?

Neither Graph Calc Plus nor Flicker Meter for Light shows ads.

### Which is updated more often, Graph Calc Plus or Flicker Meter for Light?

Graph Calc Plus ships an update every 39 months, and Flicker Meter for Light every 2 months. Most recently, Graph Calc Plus was updated on October 7, 2026 and Flicker Meter for Light on October 21, 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.*