# Luosi vs ctt light

The clearest difference is update cadence: Luosi at weekly against ctt light's every 2 months. ctt light's advantage is iOS requirement (12.3 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Luosi ships an update weekly, ctt light every 2 months. The most recent releases landed on October 8, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Luosi | ctt light |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (6 ratings)](https://appshunter.io/ios/app/luosi/id6449674882/reviews)** | — |
| Number of ratings | **6** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Weekly** | Every 2 months |
| Monetization | Free | — |
| Size | 258 MB | 334 MB |
| Requires iOS | 17.0 | **12.3** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Tao-Wu Chen](https://appshunter.io/developer/1690023718) | [CIAN-TIAN Technology Ltd.](https://appshunter.io/developer/1551880952) |

## What reviewers say

### Luosi

[App page](https://appshunter.io/ios/app/luosi/id6449674882)

This app uses the ancient Chinese BAXI algorithm to analyze and track your luck fluctuations. Understand your personal luck patterns over time with detailed insights.

**Highlights:** BAXI algorithm analysis, Luck fluctuation tracking, Personalized luck insights, Time-based analysis

**Features:** macOS Compatibility

**In-app purchases:** none


### ctt light

[App page](https://appshunter.io/ios/app/ctt-light/id6745014818)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Luosi free?

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

### Is ctt light free?

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

### Do Luosi or ctt light have ads?

Neither Luosi nor ctt light shows ads.

### Which is updated more often, Luosi or ctt light?

Luosi ships an update weekly, and ctt light every 2 months. Most recently, Luosi was updated on October 8, 2026 and ctt light on October 14, 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.*