# Grammar box vs Sky ENG

The clearest difference is ads: Grammar box at none against Sky ENG's shown. Grammar box also leads on update cadence (daily vs every 4 days) and device support (3 vs 1). On price and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Grammar box ships an update daily, Sky ENG every 4 days. The most recent releases landed on October 13, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Grammar box | Sky ENG |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Daily** | Every 4 days |
| Size | 32 MB | 2.1 GB |
| Requires iOS | **11.0** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Believe Creative ITES Pvt Ltd](https://appshunter.io/developer/1085428177) | [Reroy Panday](https://appshunter.io/developer/1855830691) |

## What reviewers say

### Grammar box

[App page](https://appshunter.io/ios/app/grammar-box/id1607534069)

**Features:** macOS Compatibility

**In-app purchases:** none


### Sky ENG

[App page](https://appshunter.io/ios/app/sky-eng/id6755718958)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Grammar box free?

Grammar box is free to download, with no in-app purchases.

### Is Sky ENG free?

Sky ENG is free to download, with no in-app purchases.

### Do Grammar box or Sky ENG have ads?

Sky ENG shows ads; Grammar box does not.

### Which is updated more often, Grammar box or Sky ENG?

Grammar box ships an update daily, and Sky ENG every 4 days. Most recently, Grammar box was updated on October 13, 2026 and Sky ENG on October 25, 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.*