# Stoichiometry vs Learn Evaporation

The clearest difference is update cadence: Stoichiometry at every 2 months against Learn Evaporation's every 59 months. Learn Evaporation's advantage is price ($1.99 vs $2.99) and iOS requirement (12.0 vs 17.1). On ads, in-app purchases and device support there is nothing between them.

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

Stoichiometry ships an update every 2 months, Learn Evaporation every 59 months. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Stoichiometry | Learn Evaporation |
| --- | --- | --- |
| Price | $2.99 | **$1.99** |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 59 months |
| Monetization | Paid | — |
| Size | 1 MB | 258 MB |
| Requires iOS | 17.1 | **12.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Roman Volinsky](https://appshunter.io/developer/977951850) | [VIRTUAL FILAMENTS PRIVATE LIMITED](https://appshunter.io/developer/1474217212) |

## 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


### Learn Evaporation

[App page](https://appshunter.io/ios/app/learn-evaporationedutech-era/id1551310256)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Stoichiometry free?

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

### Is Learn Evaporation free?

Learn Evaporation costs $1.99, with no in-app purchases.

### Do Stoichiometry or Learn Evaporation have ads?

Neither Stoichiometry nor Learn Evaporation shows ads.

### Which is updated more often, Stoichiometry or Learn Evaporation?

Stoichiometry ships an update every 2 months, and Learn Evaporation every 59 months. Most recently, Stoichiometry was updated on November 2, 2026 and Learn Evaporation on November 3, 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.*