# Stoichiometry vs ODE

The clearest difference is price: ODE at $1.99 against Stoichiometry's $2.99. ODE 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 ODE $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Stoichiometry ships an update every 2 months, ODE monthly. The most recent releases landed on September 22, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Stoichiometry | ODE |
| --- | --- | --- |
| 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 | 37 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


### ODE

[App page](https://appshunter.io/ios/app/ode-solver-integrator-pro/id1619296409)

**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 ODE free?

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

### Do Stoichiometry or ODE have ads?

Neither Stoichiometry nor ODE shows ads.

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

Stoichiometry ships an update every 2 months, and ODE monthly. Most recently, Stoichiometry was updated on September 22, 2026 and ODE on October 11, 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.*