# ChronoSync vs Lux Light Meter

The clearest difference is in-app purchases: ChronoSync at none against Lux Light Meter's 3. Lux Light Meter's advantage is update cadence (fortnightly vs every 3 months) and iOS requirement (17 vs 26.0). On price, ads 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. ChronoSync asks for nothing beyond the download.

ChronoSync ships an update every 3 months, Lux Light Meter fortnightly. The most recent releases landed on October 4, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | ChronoSync | Lux Light Meter |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (5 ratings)](https://appshunter.io/ios/app/lux-light-meter-illuminance/id6790679680/reviews)** |
| Number of ratings | — | **5** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Fortnightly** |
| Monetization | — | Free with in-app purchases |
| Size | 3 MB | 4 MB |
| Requires iOS | 26.0 | **17** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Dominic McPhee](https://appshunter.io/developer/586119758) | [灿耿 陈](https://appshunter.io/developer/1688324562) |

## What reviewers say

### ChronoSync

[App page](https://appshunter.io/ios/app/chronosync/id6759101427)

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

**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 ChronoSync free?

ChronoSync 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 ChronoSync or Lux Light Meter have ads?

Neither ChronoSync nor Lux Light Meter shows ads.

### Which is updated more often, ChronoSync or Lux Light Meter?

ChronoSync ships an update every 3 months, and Lux Light Meter fortnightly. Most recently, ChronoSync was updated on October 4, 2026 and Lux Light Meter on October 8, 2026.

---

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