# Stoichiometric equations vs Essential Guitar Note Trainer

The clearest difference is in-app purchases: Stoichiometric equations at none against Essential Guitar Note Trainer's 1. Essential Guitar Note Trainer's advantage is update cadence (monthly vs every 3 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Essential Guitar Note Trainer sells 1 in-app purchase, starting at $1.99 per month. Stoichiometric equations asks for nothing beyond the download.

Stoichiometric equations ships an update every 3 months, Essential Guitar Note Trainer monthly. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Stoichiometric equations | Essential Guitar Note Trainer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.0 (2 ratings)](https://appshunter.io/ios/app/essential-guitar-note-trainer/id6766969797/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Monthly** |
| Monetization | — | Freemium |
| Size | 17 MB | 25 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, iPod |
| Age rating | 9+ | 4+ |
| Developer | [Peter Sauer](https://appshunter.io/developer/1789152060) | [Antair Corporation](https://appshunter.io/developer/310233185) |

## What reviewers say

### Stoichiometric equations

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

**Features:** Vision Pro support

**In-app purchases:** none


### Essential Guitar Note Trainer

[App page](https://appshunter.io/ios/app/essential-guitar-note-trainer/id6766969797)

Master the guitar fretboard with focused, adaptive practice sessions. Learn every note on every string using spaced repetition to build lasting recall. Track your progress through five mastery stages and customize your learning experience.

**Highlights:** Spaced repetition learning, Adaptive practice sessions, Five mastery stages, Customizable fret range and strings, Offline functionality, No ads or accounts

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Access | $1.99 | per month |


## Frequently asked questions

### Is Stoichiometric equations free?

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

### Is Essential Guitar Note Trainer free?

Essential Guitar Note Trainer is free to download, with in-app purchases available.

### Do Stoichiometric equations or Essential Guitar Note Trainer have ads?

Neither Stoichiometric equations nor Essential Guitar Note Trainer shows ads.

### Which is updated more often, Stoichiometric equations or Essential Guitar Note Trainer?

Stoichiometric equations ships an update every 3 months, and Essential Guitar Note Trainer monthly. Most recently, Stoichiometric equations was updated on October 25, 2026 and Essential Guitar Note Trainer on October 24, 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.*