# Ninja AI vs FieldSize

The clearest difference is update cadence: Ninja AI at fortnightly against FieldSize's every 3 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Ninja AI sells 7 in-app purchases, starting at $5.00 per month and FieldSize sells 1 in-app purchase, starting at $24.99 per year. Whichever you choose, the download price is not the number that matters.

Ninja AI ships an update fortnightly, FieldSize every 3 months. The most recent releases landed on September 8, 2026 and August 9, 2026 respectively.

## The numbers

| Metric | Ninja AI | FieldSize |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (52 ratings)](https://appshunter.io/ios/app/ninja-ai-chat-code-and-create/id6702030312/reviews)** | — |
| Number of ratings | **52** | — |
| Positive reviews | 56.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 3 months |
| Monetization | Free with in-app purchases | — |
| Size | 61 MB | 15 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Ninjatech AI, Inc](https://appshunter.io/developer/1769664088) | [Chris Weed](https://appshunter.io/developer/1795373394) |

## What reviewers say

### 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


### FieldSize

[App page](https://appshunter.io/ios/app/fieldsize/id6743102897)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Yearly | $24.99 | per year |


## Frequently asked questions

### Is Ninja AI free?

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

### Is FieldSize free?

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

### Do Ninja AI or FieldSize have ads?

Neither Ninja AI nor FieldSize shows ads.

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

Ninja AI ships an update fortnightly, and FieldSize every 3 months. Most recently, Ninja AI was updated on September 8, 2026 and FieldSize on August 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.*