# DKMS vs Grammar Air

The clearest difference is in-app purchases: DKMS at none against Grammar Air's 10. DKMS also leads on ads (none vs shown) and iOS requirement (12.0 vs 16.6). Grammar Air's advantage is update cadence (every 3 weeks vs every 18 months). On price and device support there is nothing between them.

Both are free to download. Grammar Air sells 10 in-app purchases, starting at $4.99 per 7 days. DKMS asks for nothing beyond the download.

DKMS ships an update every 18 months, Grammar Air every 3 weeks. The most recent releases landed on October 26, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | DKMS | Grammar Air |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.0 (5 ratings)](https://appshunter.io/ios/app/grammar-air-writing-checker/id1616312980/reviews)** |
| Number of ratings | — | **5** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 18 months | **Every 3 weeks** |
| Monetization | — | Free with in-app purchases |
| Size | 44 MB | 219 MB |
| Requires iOS | **12.0** | 16.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [新良 曹](https://appshunter.io/developer/1512953220) | [Air Apps Systems](https://appshunter.io/developer/1316153435) |

## What reviewers say

### DKMS

[App page](https://appshunter.io/ios/app/dkms/id1165698660)

**Features:** macOS Compatibility

**In-app purchases:** none


### Grammar Air

[App page](https://appshunter.io/ios/app/grammar-air-writing-checker/id1616312980)

Enhance your writing with real-time grammar and spelling corrections. This AI-powered keyboard offers smart word suggestions and text adjustments to improve fluency and tailor your communication.

**Highlights:** Real-time grammar corrections, Instant spelling fixes, Personalized text adjustments, Smart word suggestions, Vocabulary improvement

**Features:** Apple Wallet

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Air Apps One | $4.99 | per 7 days |
| Air Apps One - 1 Week | $4.99 | per 7 days |
| Air Apps One Welcome - 1 Week | $4.99 | per 7 days |
| Air Apps One - 1 Week | $6.99 | per 7 days |
| Air Apps One - 1 Week | $7.99 | per 7 days |
| Air Apps One | $9.99 | per month |
| Air Apps One - 1 Month | $9.99 | per month |
| Air Apps One - 1 Week | $12.99 | per 7 days |
| Air Apps One | $69.99 | per year |
| Air Apps Pro - 1 Month | $199.99 | per month |


## Frequently asked questions

### Is DKMS free?

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

### Is Grammar Air free?

Grammar Air is free to download, with in-app purchases available.

### Do DKMS or Grammar Air have ads?

Grammar Air shows ads; DKMS does not.

### Which is updated more often, DKMS or Grammar Air?

DKMS ships an update every 18 months, and Grammar Air every 3 weeks. Most recently, DKMS was updated on October 26, 2026 and Grammar Air on November 3, 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.*