# CARL app vs QuattroHub

The clearest difference is rating: QuattroHub at 5.0 against CARL app's 4.2. QuattroHub also leads on update cadence (fortnightly vs every 6 weeks) and iOS requirement (12.0 vs 15.6). CARL app's advantage is ratings volume (15 vs 1). On price, ads, in-app purchases and monetization model there is nothing between them.

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

QuattroHub holds the better App Store score, 5.0 against 4.2. That said, the two scores are not equally well evidenced: CARL app has 15 ratings behind it against 1, so its average is the more settled of the two.

CARL app ships an update every 6 weeks, QuattroHub fortnightly. The most recent releases landed on November 3, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | CARL app | QuattroHub |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.2 (15 ratings)](https://appshunter.io/ios/app/carl-app/id1518314520/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/quattrohub/id6477467745/reviews)** |
| Number of ratings | **15** | 1 |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Fortnightly** |
| Monetization | Free | Free |
| Size | 29 MB | 41 MB |
| Requires iOS | 15.6 | **12.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [CARL, Inc.](https://appshunter.io/developer/1518314519) | [Via Carte Inc](https://appshunter.io/developer/1729394547) |

## What reviewers say

### CARL app

[App page](https://appshunter.io/ios/app/carl-app/id1518314520)

Access sophisticated hedge fund investment strategies previously unavailable to the general public. Build, test, and invest in your own quant hedge fund portfolios with customizable risk and return objectives. Offers real-time performance updates and flexible liquidity.

**Highlights:** Hedge fund investment strategies, Quant hedge fund portfolio building, Customizable risk and return, Technology and data-driven strategies, Low minimum investments, Real-time performance updates, Monthly liquidity

**Features:** macOS Compatibility

**In-app purchases:** none


### QuattroHub

[App page](https://appshunter.io/ios/app/quattrohub/id6477467745)

Manage your cards and digital wallet with features for adding funds, sending and requesting money, and accessing program benefits. Supports multiple currencies and provides transaction monitoring.

**Highlights:** Add and manage physical/virtual cards, Digital wallet with multi-currency support, Send and request funds, Access program benefits, Transaction monitoring, Monthly statement generation

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is CARL app free?

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

### Is QuattroHub free?

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

### Which has better reviews, CARL app or QuattroHub?

QuattroHub is rated higher. CARL app averages 4.2 out of 5 from 15 ratings, while QuattroHub averages 5.0 from 1 ratings.

### Do CARL app or QuattroHub have ads?

Neither CARL app nor QuattroHub shows ads.

### Which is updated more often, CARL app or QuattroHub?

CARL app ships an update every 6 weeks, and QuattroHub fortnightly. Most recently, CARL app was updated on November 3, 2026 and QuattroHub on November 4, 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.*