# Resistor Code Calculators vs Lux Light Meter

The clearest difference is in-app purchases: Resistor Code Calculators at none against Lux Light Meter's 3. Resistor Code Calculators also leads on iOS requirement (13.4 vs 17). Lux Light Meter's advantage is ads (none vs shown) and update cadence (fortnightly vs every 7 months). On price and device support there is nothing between them.

Both are free to download. Lux Light Meter sells 3 in-app purchases, starting at $1.99 per 7 days. Resistor Code Calculators asks for nothing beyond the download.

Resistor Code Calculators ships an update every 7 months, Lux Light Meter fortnightly. The most recent releases landed on September 17, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | Resistor Code Calculators | Lux Light Meter |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (3 ratings)](https://appshunter.io/ios/app/lux-light-meter-illuminance/id6790679680/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 7 months | **Fortnightly** |
| Monetization | — | Free with in-app purchases |
| Size | 6 MB | 4 MB |
| Requires iOS | **13.4** | 17 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Kanta Kikubo](https://appshunter.io/developer/1450598215) | [灿耿 陈](https://appshunter.io/developer/1688324562) |

## What reviewers say

### Resistor Code Calculators

[App page](https://appshunter.io/ios/app/resistor-code-calculators/id1465336419)

**Features:** macOS Compatibility

**In-app purchases:** none


### Lux Light Meter

[App page](https://appshunter.io/ios/app/lux-light-meter-illuminance/id6790679680)

Measure ambient light levels with your iPhone. Get real-time lux and foot-candle readings, with specialized modes for photography and plant care. Track light history and calibrate for accuracy.

**Highlights:** Ambient light metering (lux/fc), Photography exposure suggestions, Plant light (PPFD/DLI) estimation, Continuous measurement and history, Optional meter calibration, Privacy-friendly local storage

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Access | $1.99 | per 7 days |
| Annual Subscription | $7.99 | per year |
| Lifetime Access | $4.99 | one-time |


## Frequently asked questions

### Is Resistor Code Calculators free?

Resistor Code Calculators is free to download, with no in-app purchases.

### Is Lux Light Meter free?

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

### Do Resistor Code Calculators or Lux Light Meter have ads?

Resistor Code Calculators shows ads; Lux Light Meter does not.

### Which is updated more often, Resistor Code Calculators or Lux Light Meter?

Resistor Code Calculators ships an update every 7 months, and Lux Light Meter fortnightly. Most recently, Resistor Code Calculators was updated on September 17, 2026 and Lux Light Meter on September 25, 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.*