# csl. vs Yiku

The clearest difference is review sentiment: Yiku at 48% against csl.'s 8%. csl.'s advantage is in-app purchases (none vs 1) and iOS requirement (13.0 vs 15.6). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Yiku sells 1 one-off in-app purchase. csl. asks for nothing beyond the download.

csl. ships an update every 3 weeks, Yiku fortnightly. The most recent releases landed on October 3, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | csl. | Yiku |
| --- | --- | --- |
| 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 | **48.1% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Fortnightly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 178 MB | 180 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [CSL Mobile Limited](https://appshunter.io/developer/340690342) | [贝 王](https://appshunter.io/developer/1771245889) |

## 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


### Yiku

[App page](https://appshunter.io/ios/app/yiku/id6737256799)

This app offers a secure, encrypted private journaling experience with a new anonymous Q&A feature. Transform your voice for anonymous interactions and share notes securely to spark deeper connections and expression.

**Highlights:** Anonymous Q&A with voice modulation, End-to-end encrypted private notes, Secure sharing of notes and ideas, Voice transformation for anonymity, Private journaling and inspiration tool

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 489 Points | $0.99 | one-time |


## Frequently asked questions

### Is csl. free?

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

### Is Yiku free?

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

### Do csl. or Yiku have ads?

Neither csl. nor Yiku shows ads.

### Which is updated more often, csl. or Yiku?

csl. ships an update every 3 weeks, and Yiku fortnightly. Most recently, csl. was updated on October 3, 2026 and Yiku on October 7, 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.*