# csl. vs HK MarkSix Guide

The clearest difference is update cadence: csl. at every 3 weeks against HK MarkSix Guide's every 6 months. csl. also leads on iOS requirement (13.0 vs 15.0). 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.

csl. ships an update every 3 weeks, HK MarkSix Guide every 6 months. The most recent releases landed on October 3, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | csl. | HK MarkSix Guide |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.5 (24 ratings)](https://appshunter.io/ios/app/csl/id433378614/reviews)** | — |
| Number of ratings | **24** | — |
| Positive reviews | 8.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 6 months |
| Monetization | Free | — |
| Size | 178 MB | 33 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [CSL Mobile Limited](https://appshunter.io/developer/340690342) | [YIU WING NG](https://appshunter.io/developer/1454513690) |

## What reviewers say

### csl.

[App page](https://appshunter.io/ios/app/csl/id433378614)

Manage your mobile service plan, monitor data and voice usage, and check your account balance. Access exclusive offers, coupons, and limited-period deals. Browse the latest mobile models and service plans with special pricing.

**Highlights:** Monitor data and voice usage, Manage roaming balance, Check account balance and billing history, Automatic credit card payment setup, Access coupons and limited-period offers, Browse latest mobile models and plans

**In-app purchases:** none


### HK MarkSix Guide

[App page](https://appshunter.io/ios/app/hk-marksix-guide/id6746738751)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is csl. free?

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

### Is HK MarkSix Guide free?

HK MarkSix Guide is free to download, with no in-app purchases.

### Do csl. or HK MarkSix Guide have ads?

Neither csl. nor HK MarkSix Guide shows ads.

### Which is updated more often, csl. or HK MarkSix Guide?

csl. ships an update every 3 weeks, and HK MarkSix Guide every 6 months. Most recently, csl. was updated on October 3, 2026 and HK MarkSix Guide on October 8, 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.*