# THERble vs LUX

The clearest difference is in-app purchases: THERble at none against LUX's 3. THERble also leads on ads (none vs shown) and device support (3 vs 1). LUX's advantage is update cadence (every 2 weeks vs every 16 months). On price there is nothing between them.

Both are free to download. LUX sells 3 in-app purchases, starting at $1.99 per month. THERble asks for nothing beyond the download.

THERble ships an update every 16 months, LUX every 2 weeks. The most recent releases landed on October 27, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | THERble | LUX |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/lux-illuminance-meter/id1631156210/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 60.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 16 months | **Every 2 weeks** |
| Monetization | — | Free with in-app purchases |
| Size | 46 MB | 20 MB |
| Requires iOS | **12.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [SHIN NIPPON AIR TECHNOLOGIES CO.,LTD.](https://appshunter.io/developer/1526286874) | [koji torishima](https://appshunter.io/developer/1622793467) |

## What reviewers say

### THERble

[App page](https://appshunter.io/ios/app/therble/id1630881111)

**Features:** macOS Compatibility

**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. Track minimum, average, and maximum readings, and analyze color temperature. Useful for photography, plant care, and general environmental assessment.

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

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Plan | $1.99 | per month |
| Yearly Plan | $11.99 | per year |
| Premium Lifetime | $24.99 | one-time |


## Frequently asked questions

### Is THERble free?

THERble is free to download, with no in-app purchases.

### Is LUX free?

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

### Do THERble or LUX have ads?

LUX shows ads; THERble does not.

### Which is updated more often, THERble or LUX?

THERble ships an update every 16 months, and LUX every 2 weeks. Most recently, THERble was updated on October 27, 2026 and LUX on November 3, 2026.

---

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