# AI Detector. vs Opterra

The clearest difference is rating: Opterra at 5.0 against AI Detector.'s 4.3. Opterra also leads on ads (none vs shown) and iOS requirement (14.0 vs 16.0). AI Detector.'s advantage is in-app purchases (none vs 2) and update cadence (every 3 days vs every 2 weeks). On price and device support there is nothing between them.

Both are free to download. Opterra sells 2 in-app purchases, starting at $9.99 per month. AI Detector. asks for nothing beyond the download.

Opterra holds the better App Store score, 5.0 against 4.3. That said, the two scores are not equally well evidenced: AI Detector. has 35 ratings behind it against 5, so its average is the more settled of the two.

AI Detector. ships an update every 3 days, Opterra every 2 weeks. The most recent releases landed on October 17, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | AI Detector. | Opterra |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.3 (35 ratings)](https://appshunter.io/ios/app/ai-detector/id6747714279/reviews) | **[5.0 (5 ratings)](https://appshunter.io/ios/app/opterra/id6751297250/reviews)** |
| Number of ratings | **35** | 5 |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 3 days** | Every 2 weeks |
| Monetization | **Ad-supported** | Freemium |
| Size | 59 MB | 48 MB |
| Requires iOS | 16.0 | **14.0** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [HC MAKER - PHOTO LOGO BACKGROUND EDITOR APPS FOR FREE](https://appshunter.io/developer/1441921885) | [Opterra, Inc.](https://appshunter.io/developer/6804046055) |

## What reviewers say

### AI Detector.

[App page](https://appshunter.io/ios/app/ai-detector/id6747714279)

Instantly determine if an image was created by artificial intelligence. This tool supports detection from numerous popular AI image generators, helping you verify the authenticity of visuals.

**Highlights:** Detects AI-generated images, Supports multiple AI generators, Instant results, Verifies image authenticity

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

**In-app purchases:** none


### Opterra

[App page](https://appshunter.io/ios/app/opterra/id6751297250)

Get instant, verified answers to building code questions with an AI assistant trained on trade-specific regulations. Access cited code sections and tables for confident verification. Save references for offline use and listen to responses hands-free.

**Highlights:** AI-powered code question answering, State and local code filtering, Cited code sections and tables, Offline code section saving, Text-to-speech responses

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Opterra Pro | $9.99 | per month |
| Opterra Pro | $89.99 | per year |


## Frequently asked questions

### Is AI Detector. free?

AI Detector. is free to download, with no in-app purchases.

### Is Opterra free?

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

### Which has better reviews, AI Detector. or Opterra?

Opterra is rated higher. AI Detector. averages 4.3 out of 5 from 35 ratings, while Opterra averages 5.0 from 5 ratings.

### Do AI Detector. or Opterra have ads?

AI Detector. shows ads; Opterra does not.

### Which is updated more often, AI Detector. or Opterra?

AI Detector. ships an update every 3 days, and Opterra every 2 weeks. Most recently, AI Detector. was updated on October 17, 2026 and Opterra on October 11, 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.*