# CarlOs vs Codexial Prep

The clearest difference is update cadence: CarlOs at every 5 weeks against Codexial Prep's every 12 months. 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.

CarlOs ships an update every 5 weeks, Codexial Prep every 12 months. The most recent releases landed on August 25, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | CarlOs | Codexial Prep |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 25.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 12 months |
| Monetization | Free | — |
| Size | 33 MB | 107 MB |
| Requires iOS | **13.4** | 14.2 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 17+ |
| Developer | [ARROW GENERIQUES](https://appshunter.io/developer/1037851142) | [Codexial Dermatologie](https://appshunter.io/developer/1703569019) |

## What reviewers say

### CarlOs

[App page](https://appshunter.io/ios/app/carlos/id1442806830)

This app helps you understand your daily calcium needs and track your dietary intake to support bone health. It provides practical information on bone health, calcium, and osteoporosis. All information is for guidance only and not a substitute for medical advice.

**Highlights:** Calculate daily calcium needs, Track dietary calcium intake, Monitor calcium intake evolution, Access bone health information, Learn about osteoporosis and risk factors

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

**In-app purchases:** none


### Codexial Prep

[App page](https://appshunter.io/ios/app/codexial-prep/id1489954858)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is CarlOs free?

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

### Is Codexial Prep free?

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

### Do CarlOs or Codexial Prep have ads?

Neither CarlOs nor Codexial Prep shows ads.

### Which is updated more often, CarlOs or Codexial Prep?

CarlOs ships an update every 5 weeks, and Codexial Prep every 12 months. Most recently, CarlOs was updated on August 25, 2026 and Codexial Prep on September 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.*