# Vocab Builder vs Gravity Classes

The clearest difference is in-app purchases: Gravity Classes at none against Vocab Builder's 1. Gravity Classes also leads on update cadence (weekly vs every 11 months) and device support (3 vs 1). On price and ads there is nothing between them.

Both are free to download. Vocab Builder sells 1 in-app purchase, starting at $3.99 per 7 days. Gravity Classes asks for nothing beyond the download.

Vocab Builder ships an update every 11 months, Gravity Classes weekly. The most recent releases landed on September 17, 2026 and September 13, 2026 respectively.

## The numbers

| Metric | Vocab Builder | Gravity Classes |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 11 months | **Weekly** |
| Size | 22 MB | 48 MB |
| Requires iOS | 16.2 | **12.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Kamil Demirtas](https://appshunter.io/developer/1328561522) | [Usama Motorwala](https://appshunter.io/developer/1682475579) |

## What reviewers say

### Vocab Builder

[App page](https://appshunter.io/ios/app/vocab-builder-live-words/id6560115054)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Vocab Pro Weekly | $3.99 | per 7 days |


### Gravity Classes

[App page](https://appshunter.io/ios/app/gravity-classes/id6742048159)

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

**In-app purchases:** none


## Frequently asked questions

### Is Vocab Builder free?

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

### Is Gravity Classes free?

Gravity Classes is free to download, with no in-app purchases.

### Do Vocab Builder or Gravity Classes have ads?

Neither Vocab Builder nor Gravity Classes shows ads.

### Which is updated more often, Vocab Builder or Gravity Classes?

Vocab Builder ships an update every 11 months, and Gravity Classes weekly. Most recently, Vocab Builder was updated on September 17, 2026 and Gravity Classes on September 13, 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.*