# csl. vs Exchange Rate Express

The clearest difference is review sentiment: Exchange Rate Express at 100% against csl.'s 8%. Exchange Rate Express also leads on rating (5.0 vs 1.5). csl.'s advantage is ratings volume (26 vs 3) and iOS requirement (13.0 vs 15.0). On price, update cadence, ads and in-app purchases there is nothing between them.

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

Exchange Rate Express holds the better App Store score, 5.0 against 1.5. That said, the two scores are not equally well evidenced: csl. has 26 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 8% of csl.'s written reviews are positive against 100% of Exchange Rate Express's.

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on November 1, 2026 and November 9, 2026 respectively.

## The numbers

| Metric | csl. | Exchange Rate Express |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.5 (26 ratings)](https://appshunter.io/ios/app/csl/id433378614/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/exchange-rate-express/id6756343561/reviews)** |
| Number of ratings | **26** | 3 |
| Positive reviews | 8.3% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Monetization | Free | Free |
| Size | 178 MB | 30 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [CSL Mobile Limited](https://appshunter.io/developer/340690342) | [Yuchao Su](https://appshunter.io/developer/1860198355) |

## 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


### Exchange Rate Express

[App page](https://appshunter.io/ios/app/exchange-rate-express/id6756343561)

This app helps you monitor real-time currency exchange rates from major banks and provides automated profit/loss calculations for your currency holdings. It offers smart alerts for price movements and historical data analysis to aid in financial decisions.

**Highlights:** Real-time FX rate comparisons, Automated P&L calculation, Multi-dimensional accounting for banks and currencies, Smart monitoring and precision alerts, Historical trend analysis, Built-in currency conversion calculator

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

**In-app purchases:** none


## Frequently asked questions

### Is csl. free?

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

### Is Exchange Rate Express free?

Exchange Rate Express is free to download, with no in-app purchases.

### Which has better reviews, csl. or Exchange Rate Express?

Exchange Rate Express is rated higher. csl. averages 1.5 out of 5 from 26 ratings, while Exchange Rate Express averages 5.0 from 3 ratings.

### Do csl. or Exchange Rate Express have ads?

Neither csl. nor Exchange Rate Express shows ads.

### Which is updated more often, csl. or Exchange Rate Express?

csl. ships an update every 3 weeks, and Exchange Rate Express every 3 weeks. Most recently, csl. was updated on November 1, 2026 and Exchange Rate Express on November 9, 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.*