# Carnets vs DB RelationalAlgebra

The clearest difference is rating: DB RelationalAlgebra at 5.0 against Carnets's 4.6. DB RelationalAlgebra also leads on update cadence (every 3 weeks vs every 2 months). Carnets's advantage is ratings volume (323 vs 1) and chart position (#111 vs unranked). 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.

DB RelationalAlgebra holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Carnets has 323 ratings behind it against 1, so its average is the more settled of the two.

Carnets ships an update every 2 months, DB RelationalAlgebra every 3 weeks. The most recent releases landed on November 11, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Carnets | DB RelationalAlgebra |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (323 ratings)](https://appshunter.io/ios/app/carnets-jupyter/id1450994949/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/db-relationalalgebra/id6792125742/reviews)** |
| Number of ratings | **323** | 1 |
| Positive reviews | 78.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | Free | Free |
| Best chart rank | **#111** | — |
| Size | 1.4 GB | 2 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Nicolas Holzschuch](https://appshunter.io/developer/1450994948) | [Artur Borycki](https://appshunter.io/developer/6792125744) |

## What reviewers say

### Carnets

[App page](https://appshunter.io/ios/app/carnets-jupyter/id1450994949)

**Currently charting:** #111 Top Free · Developer Tools (US App Store)

This app provides a standalone Jupyter notebook environment for writing and executing code snippets, combining them with text and Markdown. It runs entirely on your device, offering offline access to pre-installed scientific and data science packages. Share and open notebooks with other applications.

**Highlights:** Standalone Jupyter notebook implementation, Offline execution with embedded Python, Pre-installed scientific packages (NumPy, Pandas, Matplotlib), Support for Jupyterlab, Package management via %pip, Notebook sharing and import/export

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

**In-app purchases:** none

**What reviewers like**

- 🚀 Excellent app for coding on iPad
- 👍 Convenient for learning and coding on the go
- 🚀 Works just like Jupyter Notebook on desktop
- 👍 Helpful for self-learning Python
- 👍 Useful for data science and machine learning

**What reviewers complain about**

- 🐛 Bugs and stability issues
- 🔋 Battery drain and overheating
- 🔒 Unauthorized access to photo library
- 🐛 Issues with importing certain libraries like SciPy and Scikit-learn

**Reported bugs**

- Crashes and freezes
- Issues with saving and loading notebooks
- Problems with running scripts and notebooks
- Incompatibility with newer iOS versions

**Requested features**

- Add support for SciPy, Scikit-learn, and other scientific computing libraries
- Improve file management and integration with cloud storage services
- Implement split-screen or multi-window support
- Add more keyboard shortcuts and customization options
- Improve error handling and provide more detailed error messages


### DB RelationalAlgebra

[App page](https://appshunter.io/ios/app/db-relationalalgebra/id6792125742)

This app translates SQL queries into relational algebra, tuple relational calculus, and domain relational calculus. It provides step-by-step derivations, final formulas, and interactive diagrams for each notation. It accurately reports when SQL cannot be expressed exactly by a notation.

**Highlights:** SQL to relational algebra conversion, SQL to tuple relational calculus conversion, SQL to domain relational calculus conversion, Step-by-step derivations, Interactive operator and quantifier scope trees, Comparison view of all notations

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

**In-app purchases:** none


## Frequently asked questions

### Is Carnets free?

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

### Is DB RelationalAlgebra free?

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

### Which has better reviews, Carnets or DB RelationalAlgebra?

DB RelationalAlgebra is rated higher. Carnets averages 4.6 out of 5 from 323 ratings, while DB RelationalAlgebra averages 5.0 from 1 ratings.

### Do Carnets or DB RelationalAlgebra have ads?

Neither Carnets nor DB RelationalAlgebra shows ads.

### Which is updated more often, Carnets or DB RelationalAlgebra?

Carnets ships an update every 2 months, and DB RelationalAlgebra every 3 weeks. Most recently, Carnets was updated on November 11, 2026 and DB RelationalAlgebra on November 5, 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.*