# AI helper vs Ninja AI

The clearest difference is review sentiment: AI helper at 100% against Ninja AI's 56%. AI helper also leads on rating (5.0 vs 4.0) and iOS requirement (13.4 vs 15.1). Ninja AI's advantage is ratings volume (52 vs 4). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. AI helper sells 4 in-app purchases, starting at $1.99 per 7 days and Ninja AI sells 7 in-app purchases, starting at $5.00 per month. Whichever you choose, the download price is not the number that matters.

AI helper holds the better App Store score, 5.0 against 4.0. That said, the two scores are not equally well evidenced: Ninja AI has 52 ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 100% of AI helper's written reviews are positive against 56% of Ninja AI's.

Both ship on a similar rhythm, roughly fortnightly. The most recent releases landed on September 7, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | AI helper | Ninja AI |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (4 ratings)](https://appshunter.io/ios/app/ai-helper-rewriter-assistant/id6520385088/reviews)** | [4.0 (52 ratings)](https://appshunter.io/ios/app/ninja-ai-chat-code-and-create/id6702030312/reviews) |
| Number of ratings | 4 | **52** |
| Positive reviews | **100.0% of reviews** | 56.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | Fortnightly |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 24 MB | 61 MB |
| Requires iOS | **13.4** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [TRIPICAL VIET NAM LIMITED LIABILITY COMPANY](https://appshunter.io/developer/1639507731) | [Ninjatech AI, Inc](https://appshunter.io/developer/1769664088) |

## What reviewers say

### AI helper

[App page](https://appshunter.io/ios/app/ai-helper-rewriter-assistant/id6520385088)

This AI-powered tool offers advanced language assistance, including context-aware translations, grammar correction, and content summarization. It functions as a writing assistant for emails and essays, with a comprehensive dictionary. The app is designed to be lightweight and ad-free, requiring no account for use.

**Highlights:** AI-driven multi-language translation, Grammar check and correction, AI chatbot writing assistance, Content summarizer, Comprehensive dictionary, Ad-free and no account required

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly subscription | $1.99 | per 7 days |
| Monthly subscrition | $2.99 | per month |
| Annually Subscription | $19.99 | per year |
| Lifetime purchase | $29.99 | one-time |


### Ninja AI

[App page](https://appshunter.io/ios/app/ninja-ai-chat-code-and-create/id6702030312)

This AI assistant offers a dual experience with a chat agent for everyday tasks and an autonomous agent for complex projects. It supports numerous premium AI models for tasks like coding, content creation, research, and website building, boasting high-speed performance.

**Highlights:** Dual AI experience (Chat & Autonomous Agent), Supports 40+ premium AI models, Autonomous project execution on its own computer, Blazing fast performance (up to 3000 tokens/sec), Website building and deployment, Content creation (text, images, video, podcasts), Code generation and debugging, File analysis and research

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

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Standard | $5.00 | per month |
| Pro | $10.00 | per month |
| Ultra | $15.00 | per month |
| SuperNinja Standard | $19.00 | per month |
| SuperNinja Pro | $29.00 | per month |
| SuperNinja Ultra | $49.00 | per month |
| SuperNinja Max | $149.00 | per month |

**What reviewers like**

- 🚀 Fast and efficient
- 👍 Smooth and user-friendly UI
- 💡 Powerful research and analysis capabilities
- 🚀 Sleek and responsive
- 👍 Integrated interface

**What reviewers complain about**

- 💰 Pay-to-use model for advanced features
- 🗑️ Inability to delete old chats

**Reported bugs**

- Crashes and freezes reported
- Compatibility issues with older devices

**Requested features**

- Implement delete option for chat history
- Add Chinese language support


## Frequently asked questions

### Is AI helper free?

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

### Is Ninja AI free?

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

### Which has better reviews, AI helper or Ninja AI?

AI helper is rated higher. AI helper averages 5.0 out of 5 from 4 ratings, while Ninja AI averages 4.0 from 52 ratings.

### Do AI helper or Ninja AI have ads?

Neither AI helper nor Ninja AI shows ads.

### Which is updated more often, AI helper or Ninja AI?

AI helper ships an update fortnightly, and Ninja AI fortnightly. Most recently, AI helper was updated on September 7, 2026 and Ninja AI on September 8, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*