# Stoichiometric equations vs SimpleTools

The clearest difference is in-app purchases: Stoichiometric equations at none against SimpleTools's 2. Stoichiometric equations also leads on device support (4 vs 2) and iOS requirement (15.0 vs 17). SimpleTools's advantage is update cadence (weekly vs every 3 months). On price and ads there is nothing between them.

Both are free to download. SimpleTools sells 2 in-app purchases, starting at $4.99 per 7 days. Stoichiometric equations asks for nothing beyond the download.

Stoichiometric equations ships an update every 3 months, SimpleTools weekly. The most recent releases landed on October 5, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | Stoichiometric equations | SimpleTools |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/simpletools-chemistry-solver/id6762289966/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Weekly** |
| Monetization | — | Freemium |
| Size | 17 MB | 15 MB |
| Requires iOS | **15.0** | 17 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad |
| Age rating | 9+ | 4+ |
| Developer | [Peter Sauer](https://appshunter.io/developer/1789152060) | [Yevhenii Kniaziev](https://appshunter.io/developer/1878685835) |

## What reviewers say

### Stoichiometric equations

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

**Features:** Vision Pro support

**In-app purchases:** none


### SimpleTools

[App page](https://appshunter.io/ios/app/simpletools-chemistry-solver/id6762289966)

Instantly solve chemistry problems with AI-powered, step-by-step explanations. Snap a photo of any chemistry question and receive a clear, structured solution in seconds, helping students and parents understand problem-solving processes.

**Highlights:** AI-powered problem solving, Photo scanning for problems, Step-by-step explanations, Supports various chemistry topics, Unlimited scans with premium

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Weekly | $4.99 | per 7 days |
| Premium Yearly | $29.99 | per year |


## Frequently asked questions

### Is Stoichiometric equations free?

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

### Is SimpleTools free?

SimpleTools is free to download, with in-app purchases available.

### Do Stoichiometric equations or SimpleTools have ads?

Neither Stoichiometric equations nor SimpleTools shows ads.

### Which is updated more often, Stoichiometric equations or SimpleTools?

Stoichiometric equations ships an update every 3 months, and SimpleTools weekly. Most recently, Stoichiometric equations was updated on October 5, 2026 and SimpleTools on October 19, 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.*