# AI Grammar Assistant vs DecipherInk

The clearest difference is ads: AI Grammar Assistant at none against DecipherInk's shown. DecipherInk's advantage is device support (3 vs 1). On price, review sentiment, update cadence and in-app purchases there is nothing between them.

Both are free to download. AI Grammar Assistant sells 7 in-app purchases, starting at $2.99 per 7 days and DecipherInk sells 5 in-app purchases, starting at $0.99 per 7 days. Whichever you choose, the download price is not the number that matters.

AI Grammar Assistant ships an update every 2 months, DecipherInk every 5 weeks. The most recent releases landed on October 11, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | AI Grammar Assistant | DecipherInk |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (4 ratings)](https://appshunter.io/ios/app/decipherink/id6742208925/reviews)** |
| Number of ratings | — | **4** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Every 5 weeks** |
| Monetization | Freemium | Free with in-app purchases |
| Size | 3 MB | 40 MB |
| Requires iOS | 16.6 | **15.1** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Leimomi Lane](https://appshunter.io/developer/1736577207) | [Glassfish Education, LLC](https://appshunter.io/developer/1797444818) |

## What reviewers say

### AI Grammar Assistant

[App page](https://appshunter.io/ios/app/ai-grammar-assistant/id6479434692)

Enhance your writing with AI-powered proofreading. Get instant corrections for grammar, spelling, and punctuation, along with style and tone suggestions. Learn from your mistakes with personalized tips to improve your communication skills.

**Highlights:** Comprehensive grammar, punctuation, and spelling checks, Style and tone suggestions, Personalized learning tips, Instant feedback, Seamless integration with various platforms

**Features:** macOS Compatibility

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| AI Assistant Premium | $2.99 | per 7 days |
| Basic Monthly Subscription | $10.00 | per month |
| Pro Monthly Subscription | $20.00 | per month |
| Premium Monthly Subscription | $30.00 | per month |
| Basic Yearly Subscription | $100.00 | per year |
| Pro Yearly Subscription | $200.00 | per year |
| Premium Yearly Subscription | $300.00 | per year |


### DecipherInk

[App page](https://appshunter.io/ios/app/decipherink/id6742208925)

Learn to read historical documents with this interactive app. It focuses on paleography, grammar, and vocabulary for genealogical research. Practice exercises enhance reading speed and retention.

**Highlights:** Paleography and script learning, Genealogical document vocabulary, Basic grammar for historical texts, Reading speed practice, Document deciphering exercises, Reference materials

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| German - 1 Week | $0.99 | per 7 days |
| German - 1 Month | $25.00 | per month |
| German - 3 Months | $254.99 | per 3 months |
| German - 1 Year | $274.99 | per year |
| German - 6 Months | $449.99 | per 6 months |


## Frequently asked questions

### Is AI Grammar Assistant free?

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

### Is DecipherInk free?

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

### Do AI Grammar Assistant or DecipherInk have ads?

DecipherInk shows ads; AI Grammar Assistant does not.

### Which is updated more often, AI Grammar Assistant or DecipherInk?

AI Grammar Assistant ships an update every 2 months, and DecipherInk every 5 weeks. Most recently, AI Grammar Assistant was updated on October 11, 2026 and DecipherInk on October 9, 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.*