# Sketch Simply vs Ninja AI

The clearest difference is price: Ninja AI at Free against Sketch Simply's $0.99. Ninja AI also leads on rating (4.0 vs 3.6) and ratings volume (52 vs 5). On review sentiment, update cadence, ads and in-app purchases there is nothing between them.

Ninja AI is free to download; Sketch Simply costs $0.99 up front. Sketch Simply sells 1 one-off in-app purchase 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.

Ninja AI holds the better App Store score, 4.0 against 3.6. That said, the two scores are not equally well evidenced: Ninja AI has 52 ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 50% of Sketch Simply's written reviews are positive against 56% of Ninja AI's.

Sketch Simply ships an update every 11 days, Ninja AI fortnightly. The most recent releases landed on June 1, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | Sketch Simply | Ninja AI |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | [3.6 (5 ratings)](https://appshunter.io/ios/app/sketch-simply/id1448602327/reviews) | **[4.0 (52 ratings)](https://appshunter.io/ios/app/ninja-ai-chat-code-and-create/id6702030312/reviews)** |
| Number of ratings | 5 | **52** |
| Positive reviews | 50.0% of reviews | **56.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 11 days** | Fortnightly |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 1 MB | 61 MB |
| Requires iOS | **14.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Montiel Mobile, LLC](https://appshunter.io/developer/412384290) | [Ninjatech AI, Inc](https://appshunter.io/developer/1769664088) |

## What reviewers say

### Sketch Simply

[App page](https://appshunter.io/ios/app/sketch-simply/id1448602327)

This app serves as a digital sketchbook for brainstorming, rough designs, and idea recording. It offers Apple Pencil support to prevent accidental touch drawings and automatically backs up and synchronizes sketches across devices via iCloud. Archived books can be shared as PDFs or used for collaboration.

**Highlights:** Digital sketchbook for ideas and designs, Apple Pencil support for precise drawing, Automatic iCloud backup and synchronization, Share sketches as images or PDF archives, Collaborative whiteboard feature via AirPlay, Draw in color with an in-app purchase

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Draw in Color | $2.99 | 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 Sketch Simply free?

Sketch Simply costs $0.99, and also offers in-app purchases.

### Is Ninja AI free?

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

### Which has better reviews, Sketch Simply or Ninja AI?

Ninja AI is rated higher. Sketch Simply averages 3.6 out of 5 from 5 ratings, while Ninja AI averages 4.0 from 52 ratings.

### Do Sketch Simply or Ninja AI have ads?

Neither Sketch Simply nor Ninja AI shows ads.

### Which is updated more often, Sketch Simply or Ninja AI?

Sketch Simply ships an update every 11 days, and Ninja AI fortnightly. Most recently, Sketch Simply was updated on June 1, 2026 and Ninja AI on September 8, 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.*