# Stoichiometry vs Geometry

The clearest difference is price: Geometry at $1.99 against Stoichiometry's $2.99. Geometry also leads on iOS requirement (15.1 vs 17.1). On update cadence, ads, in-app purchases and device support there is nothing between them.

Stoichiometry costs $2.99 and Geometry $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Stoichiometry ships an update every 2 months, Geometry monthly. The most recent releases landed on November 2, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Stoichiometry | Geometry |
| --- | --- | --- |
| Price | $2.99 | **$1.99** |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Monthly** |
| Monetization | Paid | — |
| Size | 1 MB | 31 MB |
| Requires iOS | 17.1 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Roman Volinsky](https://appshunter.io/developer/977951850) | [Om Prakash Chapagain](https://appshunter.io/developer/1618620262) |

## What reviewers say

### Stoichiometry

[App page](https://appshunter.io/ios/app/stoichiometry/id1330949637)

This tool helps balance chemical reactions and calculate molar masses, moles, and actual masses of reactants and products. It supports various formula formats and can identify limiting reagents. Data can be sent to another app for gas phase calculations.

**Highlights:** Balance chemical reactions, Calculate molar masses, Determine moles and actual masses, Identify limiting reagents, Supports various formula formats, Integrates with Gas Phase Stoichiometry app

**Features:** Vision Pro support

**In-app purchases:** none


### Geometry

[App page](https://appshunter.io/ios/app/geometry-solver-pro/id1618832615)

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

**In-app purchases:** none


## Frequently asked questions

### Is Stoichiometry free?

Stoichiometry costs $2.99, with no in-app purchases.

### Is Geometry free?

Geometry costs $1.99, with no in-app purchases.

### Do Stoichiometry or Geometry have ads?

Neither Stoichiometry nor Geometry shows ads.

### Which is updated more often, Stoichiometry or Geometry?

Stoichiometry ships an update every 2 months, and Geometry monthly. Most recently, Stoichiometry was updated on November 2, 2026 and Geometry 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.*