# Line vs Proofreader AI Grammar Checker

The clearest difference is rating: Proofreader AI Grammar Checker at 4.7 against Line's 3.3. Proofreader AI Grammar Checker also leads on review sentiment (65% vs 33%) and update cadence (every 3 weeks vs every 4 months). Line's advantage is monetization model (free vs freemium) and iOS requirement (14.0 vs 16.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Line sells 1 one-off in-app purchase and Proofreader AI Grammar Checker sells 8 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

Proofreader AI Grammar Checker holds the better App Store score, 4.7 against 3.3. That said, the two scores are not equally well evidenced: Proofreader AI Grammar Checker has 3.3K ratings behind it against 8, so its average is the more settled of the two. Written reviews point the same way: 33% of Line's written reviews are positive against 65% of Proofreader AI Grammar Checker's.

Line ships an update every 4 months, Proofreader AI Grammar Checker every 3 weeks. The most recent releases landed on November 3, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | Line | Proofreader AI Grammar Checker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.3 (8 ratings)](https://appshunter.io/ios/app/line-ize/id1493577592/reviews) | **[4.7 (3.3K ratings)](https://appshunter.io/ios/app/proofreader-ai-grammar-checker/id1494119626/reviews)** |
| Number of ratings | 8 | **3.3K** |
| Positive reviews | 33.3% of reviews | **64.7% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 weeks** |
| Monetization | **Free** | Freemium |
| Size | 4 MB | 60 MB |
| Requires iOS | **14.0** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [kevin green](https://appshunter.io/developer/1311780695) | [BlueSoar SL](https://appshunter.io/developer/1493410779) |

## What reviewers say

### Line

[App page](https://appshunter.io/ios/app/line-ize/id1493577592)

Transform any photo or graphic into a line drawing with this efficient tool. Ideal for artists, it offers easy tracing, direct printing, and cloud saving. Now free for all users, it supports multiple images and layers for complex artwork.

**Highlights:** Image to line drawing conversion, Supports multiple images, Layer support, Adjustable line levels, Tracing mode with disabled touches, Light table functionality, Print and cloud save options

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $4.99 | one-time |


### Proofreader AI Grammar Checker

[App page](https://appshunter.io/ios/app/proofreader-ai-grammar-checker/id1494119626)

Enhance your writing with a comprehensive grammar checker and AI assistant. Improve clarity, rewrite sentences, detect AI-generated text, and access a translator and dictionary. Works seamlessly across all your typing applications.

**Highlights:** Grammar, spelling, and punctuation correction, Sentence rewriting and tone adjustment, AI-generated text detection, Clipboard for saving and reusing text, Translator for over 100 languages, Writing insights and style suggestions

**Features:** Vision Pro support

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Proofreader Pro | $4.99 | per month |
| Proofreader Pro | $9.99 | per month |
| Monthly Plan | $9.99 | per month |
| Proofreader Pro | $13.49 | per 3 months |
| Proofreader Pro | $24.99 | per 3 months |
| Proofreader Pro | $39.99 | per year |
| Proofreader Pro | $47.99 | per year |
| Proofreader Pro | $49.99 | per year |

**What reviewers like**

- 🚀 Helpful grammar and writing suggestions
- 👍 Easy to use
- 💡 Affordable alternative to Grammarly
- 👍 Explains why changes are suggested
- 💡 Useful for non-native English speakers

**What reviewers complain about**

- 🐛 Inconsistent performance, sometimes misses errors
- 🔍 Limited functionality in free version
- 🔍 Subscription required for full features
- 🐛 Issues with pasting text into other apps
- 🐛 Struggles with specialized/foreign names

**Reported bugs**

- Difficulty cancelling subscriptions
- Unexpected charges during free trials
- App crashes or freezes
- Incorrect grammar/spelling corrections

**Requested features**

- Keyboard integration for easier use
- More customization options
- Improved accuracy and consistency
- Desktop/browser extension version
- Better handling of creative/informal writing styles


## Frequently asked questions

### Is Line free?

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

### Is Proofreader AI Grammar Checker free?

Proofreader AI Grammar Checker is free to download, with in-app purchases available.

### Which has better reviews, Line or Proofreader AI Grammar Checker?

Proofreader AI Grammar Checker is rated higher. Line averages 3.3 out of 5 from 8 ratings, while Proofreader AI Grammar Checker averages 4.7 from 3.3K ratings.

### Do Line or Proofreader AI Grammar Checker have ads?

Neither Line nor Proofreader AI Grammar Checker shows ads.

### Which is updated more often, Line or Proofreader AI Grammar Checker?

Line ships an update every 4 months, and Proofreader AI Grammar Checker every 3 weeks. Most recently, Line was updated on November 3, 2026 and Proofreader AI Grammar Checker on November 7, 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.*