# Angle Gradient Inclinometer vs LUX

The clearest difference is in-app purchases: Angle Gradient Inclinometer at none against LUX's 2. Angle Gradient Inclinometer also leads on iOS requirement (13 vs 18.0). LUX's advantage is update cadence (every 10 days vs every 8 months). On price, review sentiment, ads and device support there is nothing between them.

Both are free to download. LUX sells 2 in-app purchases, starting at $1.99 per month. Angle Gradient Inclinometer asks for nothing beyond the download.

Angle Gradient Inclinometer ships an update every 8 months, LUX every 10 days. The most recent releases landed on October 14, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Angle Gradient Inclinometer | LUX |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (295 ratings)](https://appshunter.io/ios/app/angle-gradient-inclinometer/id530077112/reviews)** | — |
| Number of ratings | **295** | — |
| Positive reviews | 51.1% of reviews | **55.6% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 8 months | **Every 10 days** |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 11 MB | 17 MB |
| Requires iOS | **13** | 18.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [SHIGETO TAKAGI](https://appshunter.io/developer/519611619) | [koji torishima](https://appshunter.io/developer/1622793467) |

## What reviewers say

### Angle Gradient Inclinometer

[App page](https://appshunter.io/ios/app/angle-gradient-inclinometer/id530077112)

Easily measure tilt angles with this free protractor app. It displays inclination from 0 to 359 degrees, along with gradient percentages and angles summing to 180 or 360 degrees. Switch to theodolite mode to set a specified angle to zero.

**Highlights:** Measure tilt angles 0-359 degrees, Display gradient percentage, Show sum angles (180/360), Theodolite mode, Set specified angle to zero

**Features:** Vision Pro support

**In-app purchases:** none


### LUX

[App page](https://appshunter.io/ios/app/lux-illuminance-meter/id1631156210)

Measure ambient light levels in lux or foot-candles instantly. Useful for photography, plant care, or verifying brightness for various tasks. Offers advanced features like color temperature and measurement history for premium users.

**Highlights:** Instant lux measurement, Color temperature (CCT) reading, Foot-candle unit toggle, Min/Avg/Max lux tracking, Measurement history (Premium), CSV export (Premium)

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Plan | $1.99 | per month |
| Yearly Plan | $11.99 | per year |


## Frequently asked questions

### Is Angle Gradient Inclinometer free?

Angle Gradient Inclinometer is free to download, with no in-app purchases.

### Is LUX free?

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

### Do Angle Gradient Inclinometer or LUX have ads?

Both Angle Gradient Inclinometer and LUX show ads.

### Which is updated more often, Angle Gradient Inclinometer or LUX?

Angle Gradient Inclinometer ships an update every 8 months, and LUX every 10 days. Most recently, Angle Gradient Inclinometer was updated on October 14, 2026 and LUX on October 11, 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.*