# Abac vs Orthographe rationnelle

Abac and Orthographe rationnelle are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

## The numbers

| Metric | Abac | Orthographe rationnelle |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | — |
| Monetization | Free | — |
| Size | 32 MB | 6 MB |
| Requires iOS | 15.2 | **15.0** |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Mathieu Ribeiro](https://appshunter.io/developer/1273974810) | [Etudes pour une Rationalisation de l'Orthographe Francaise d'Aujourdhui](https://appshunter.io/developer/1805467506) |

## What reviewers say

### Abac

[App page](https://appshunter.io/ios/app/abac/id1551131912)

This utility app helps users calculate SF6 gas pressure based on ambient temperature, check densistat thresholds, and determine dew point. It is designed to be a comprehensive tool for specific industrial needs and will be improved with future updates.

**Highlights:** SF6 pressure conversion, Ambient temperature factor, Densistat threshold verification, Dew point calculation, Regular updates

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

**In-app purchases:** none


### Orthographe rationnelle

[App page](https://appshunter.io/ios/app/orthographe-rationnelle/id6482850164)

**Features:** Safari Extension

**In-app purchases:** none


## Frequently asked questions

### Is Abac free?

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

### Is Orthographe rationnelle free?

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

### Do Abac or Orthographe rationnelle have ads?

Neither Abac nor Orthographe rationnelle shows ads.

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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.*