# Grammar AI Keyboard vs Nulo

The clearest difference is rating: Grammar AI Keyboard at 4.4 against Nulo's 3.4. Grammar AI Keyboard also leads on review sentiment (77% vs 50%) and update cadence (every 10 days vs every 3 weeks). Nulo's advantage is ads (none vs shown) and device support (3 vs 1). On price, in-app purchases, monetization model and iOS requirement there is nothing between them.

Both are free to download. Grammar AI Keyboard sells 10 in-app purchases, starting at $2.99 per 7 days and Nulo sells 8 in-app purchases, starting at $3.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Grammar AI Keyboard holds the better App Store score, 4.4 against 3.4. Both are backed by a comparable volume of ratings — 63 and 18 respectively. Written reviews point the same way: 77% of Grammar AI Keyboard's written reviews are positive against 50% of Nulo's.

Grammar AI Keyboard ships an update every 10 days, Nulo every 3 weeks. The most recent releases landed on October 30, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | Grammar AI Keyboard | Nulo |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (63 ratings)](https://appshunter.io/ios/app/grammar-ai-keyboard-keysai/id6477995307/reviews)** | [3.4 (18 ratings)](https://appshunter.io/ios/app/nulo/id6737268151/reviews) |
| Number of ratings | **63** | 18 |
| Positive reviews | **76.7% of reviews** | 50.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 10 days** | Every 3 weeks |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 95 MB | 132 MB |
| Requires iOS | 16.0 | **15.6** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [Zerovik](https://appshunter.io/developer/1819093753) | [326 LAB - FZCO](https://appshunter.io/developer/1772075789) |

## What reviewers say

### Grammar AI Keyboard

[App page](https://appshunter.io/ios/app/grammar-ai-keyboard-keysai/id6477995307)

This AI-powered keyboard enhances your writing by correcting grammar and spelling errors in real-time. It offers word suggestions, instant translation, and message completion to improve clarity and efficiency across all your applications.

**Highlights:** Grammar and spelling correction, Word choice enhancement, Real-time translation, Automated message completion, Paraphrasing capabilities, AI text generation

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Keys AI Premium, Weekly | $2.99 | per 7 days |
| Keys AI Premium, Weekly | $2.99 | per 7 days |
| Keys AI Premium, Weekly | $7.99 | per 7 days |
| Keys AI Premium, Annual | $29.99 | per year |
| Keys AI Premium, Annual | $29.99 | per year |
| Keys AI Premium, Annual | $39.99 | per year |
| Keys AI Premium, Annual | $39.99 | per year |
| Keys AI Premium, Lifetime | $49.99 | one-time |
| Keys AI Premium, Lifetime | $59.99 | one-time |
| Keys AI Premium, Lifetime | $69.99 | one-time |


### Nulo

[App page](https://appshunter.io/ios/app/nulo/id6737268151)

Effortlessly scan, identify, and value your sports cards. This app helps you organize your collection, track your scans, and discover estimated card prices from various marketplaces. Build and manage your digital sports card collection with ease.

**Highlights:** Scan sports cards with AI, Identify card details quickly, Check estimated card values, Save scan history, Organize cards into collections, Digital collection management

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PRO Weekly | $3.99 | per 7 days |
| PRO Weekly | $3.99 | per 7 days |
| PRO Weekly | $4.99 | per 7 days |
| PRO Weekly | $4.99 | per 7 days |
| PRO Yearly | $29.99 | per year |
| PRO Yearly | $29.99 | per year |
| PRO Yearly | $39.99 | per year |
| PRO Yearly | $39.99 | per year |


## Frequently asked questions

### Is Grammar AI Keyboard free?

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

### Is Nulo free?

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

### Which has better reviews, Grammar AI Keyboard or Nulo?

Grammar AI Keyboard is rated higher. Grammar AI Keyboard averages 4.4 out of 5 from 63 ratings, while Nulo averages 3.4 from 18 ratings.

### Do Grammar AI Keyboard or Nulo have ads?

Grammar AI Keyboard shows ads; Nulo does not.

### Which is updated more often, Grammar AI Keyboard or Nulo?

Grammar AI Keyboard ships an update every 10 days, and Nulo every 3 weeks. Most recently, Grammar AI Keyboard was updated on October 30, 2026 and Nulo on November 4, 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.*