# xiaolanLock vs Lucent

The clearest difference is price: xiaolanLock at Free against Lucent's $0.99. xiaolanLock also leads on iOS requirement (9.0 vs 26.2). On update cadence, ads, in-app purchases and device support there is nothing between them.

xiaolanLock is free to download; Lucent costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

xiaolanLock ships an update monthly, Lucent every 4 weeks. The most recent releases landed on November 7, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | xiaolanLock | Lucent |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 4 weeks** |
| Size | 32 MB | 3 MB |
| Requires iOS | **9.0** | 26.2 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [庆省 韩](https://appshunter.io/developer/1441108108) | [志杰 张](https://appshunter.io/developer/1819432983) |

## What reviewers say

### xiaolanLock

[App page](https://appshunter.io/ios/app/xiaolanlock/id1530035531)

**Features:** macOS Compatibility

**In-app purchases:** none


### Lucent

[App page](https://appshunter.io/ios/app/lucent-reading-light-check/id6800970800)

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

**In-app purchases:** none


## Frequently asked questions

### Is xiaolanLock free?

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

### Is Lucent free?

Lucent costs $0.99, with no in-app purchases.

### Do xiaolanLock or Lucent have ads?

Neither xiaolanLock nor Lucent shows ads.

### Which is updated more often, xiaolanLock or Lucent?

xiaolanLock ships an update monthly, and Lucent every 4 weeks. Most recently, xiaolanLock was updated on November 7, 2026 and Lucent on October 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.*