# Vocab Builder vs Gravity Classes

The clearest difference is in-app purchases: Gravity Classes at none against Vocab Builder's 2. Gravity Classes also leads on update cadence (weekly vs every 3 months) and device support (3 vs 1). On price and ads there is nothing between them.

Both are free to download. Vocab Builder sells 2 in-app purchases, starting at $3.99 per 7 days. Gravity Classes asks for nothing beyond the download.

Vocab Builder ships an update every 3 months, Gravity Classes weekly. The most recent releases landed on November 4, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Vocab Builder | Gravity Classes |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | **Weekly** |
| Size | 21 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-lock-screen/id6560115054)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Vocab Pro Weekly | $3.99 | per 7 days |
| Vocab Premium Yearly | $29.99 | per year |


### 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 3 months, and Gravity Classes weekly. Most recently, Vocab Builder was updated on November 4, 2026 and Gravity Classes on October 30, 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.*