# Formulae Pro vs Stoichiometric equations

The clearest difference is price: Stoichiometric equations at Free against Formulae Pro's $1.99. Stoichiometric equations also leads on in-app purchases (none vs 3) and ads (none vs shown). Formulae Pro's advantage is update cadence (every 4 days vs every 3 months). On device support and iOS requirement there is nothing between them.

Stoichiometric equations is free to download; Formulae Pro costs $1.99 up front. Formulae Pro sells 3 in-app purchases, starting at $1.99 per 7 days. Stoichiometric equations asks for nothing beyond the download.

Formulae Pro ships an update every 4 days, Stoichiometric equations every 3 months. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Formulae Pro | Stoichiometric equations |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 4 days** | Every 3 months |
| Monetization | Free with in-app purchases | — |
| Size | 46 MB | 17 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod, Mac | iPhone, iPad, iPod, Mac |
| Age rating | 4+ | 9+ |
| Developer | [CAPDESIS S.A. DE C.V.](https://appshunter.io/developer/1639711954) | [Peter Sauer](https://appshunter.io/developer/1789152060) |

## What reviewers say

### Formulae Pro

[App page](https://appshunter.io/ios/app/formulae-pro/id1666691016)

This educational app provides students and teachers with a comprehensive collection of solved formulas and exercises. It uses explanatory images and videos to enhance understanding and offers search functionality for specific formulas. Improve your academic skills effectively and simply.

**Highlights:** Solved formulas and exercises, Explanatory images and videos, Search for specific formulas, Concept comprehension tools, Academic performance improvement

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Formulae Pro Semanal | $1.99 | per 7 days |
| Formulae Pro Mensual | $5.99 | per month |
| Formulae Pro Anual | $59.99 | per year |


### Stoichiometric equations

[App page](https://appshunter.io/ios/app/stoichiometric-equations/id6740244756)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Formulae Pro free?

Formulae Pro costs $1.99, and also offers in-app purchases.

### Is Stoichiometric equations free?

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

### Do Formulae Pro or Stoichiometric equations have ads?

Formulae Pro shows ads; Stoichiometric equations does not.

### Which is updated more often, Formulae Pro or Stoichiometric equations?

Formulae Pro ships an update every 4 days, and Stoichiometric equations every 3 months. Most recently, Formulae Pro was updated on October 24, 2026 and Stoichiometric equations on October 25, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*