# CARL app vs NIL Stacks App

The clearest difference is rating: NIL Stacks App at 5.0 against CARL app's 4.2. CARL app's advantage is update cadence (every 6 weeks vs every 7 months) and device support (3 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.

NIL Stacks App holds the better App Store score, 5.0 against 4.2. Both are backed by a comparable volume of ratings — 15 and 4 respectively.

CARL app ships an update every 6 weeks, NIL Stacks App every 7 months. Both last shipped on June 4, 2026.

## The numbers

| Metric | CARL app | NIL Stacks App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.2 (15 ratings)](https://appshunter.io/ios/app/carl-app/id1518314520/reviews) | **[5.0 (4 ratings)](https://appshunter.io/ios/app/nil-stacks-app/id1525132202/reviews)** |
| Number of ratings | **15** | 4 |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 7 months |
| Monetization | Free | Free |
| Size | 29 MB | 1 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [CARL, Inc.](https://appshunter.io/developer/1518314519) | [New Internet Labs Limited](https://appshunter.io/developer/1525132204) |

## 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


### NIL Stacks App

[App page](https://appshunter.io/ios/app/nil-stacks-app/id1525132202)

Track the real-time price of STX in both USD and BTC. This app provides convenient home screen widgets to monitor the STX ecosystem's health at a glance.

**Highlights:** STX price ticker (USD), STX price ticker (BTC), Home screen widgets, Ecosystem health monitoring, Real-time price updates

**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 NIL Stacks App free?

NIL Stacks App is free to download, with no in-app purchases.

### Which has better reviews, CARL app or NIL Stacks App?

NIL Stacks App is rated higher. CARL app averages 4.2 out of 5 from 15 ratings, while NIL Stacks App averages 5.0 from 4 ratings.

### Do CARL app or NIL Stacks App have ads?

Neither CARL app nor NIL Stacks App shows ads.

### Which is updated more often, CARL app or NIL Stacks App?

CARL app ships an update every 6 weeks, and NIL Stacks App every 7 months. Most recently, CARL app was updated on June 4, 2026 and NIL Stacks App on June 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.*