# GPTZero: Twain Humanizer AI — Quill Essay Humanizer & Retext

> AI content analysis, originality check, and text humanization tool. (iPhone/iPad app by Najmudin Cahyono.)

- Source: https://appshunter.io/ios/app/gptzero-twain-humanizer-ai/id6758375448 (this page in markdown: same URL + `.md`)
- Developer: [Najmudin Cahyono](https://appshunter.io/developer/1852725014)
- Category: Utilities
- Price: Free with in-app purchases
- Rating: 5.00/5 from 1 App Store ratings
- Age rating: 4+
- Requires: iOS 15.6 · 25 MB
- Languages: English, French, German, Italian, Korean, Portuguese, Spanish, Chinese, Turkish
- Released: 2026-05-21
- Data updated: 2026-08-25
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/gptzero-twain-humanizer-ai/id6758375448/reviews.md

## What is GPTZero?

GPTZero: Twain Humanizer AI helps you understand, review, and refine your content with clear, instant feedback—so your writing feels natural, original, and confident.
Whether you’re checking for AI-generated content, verifying originality, or polishing your tone, JustZero brings everything together in one simple, focused workflow.

Key Features:
- AI Content Analysis  
  Check your text across multiple AI detection models.
- Originality & Plagiarism Check  
  Identify duplicated content and keep your work authentic.
- Humanize Text  
  Improve readability for a natural, human-like tone.
- Essay & Content Generator  
  Create structured essays or articles with ease.
- AI Audio Detection  
  Analyze audio files for signs of AI-generated speech.
- Easy Input & History  
  Paste or upload content and review past checks anytime.

Quick to start and easy to use, GPTZero: Twain Humanizer AI is designed for everyday writing needs—helping you analyze content clearly and improve it with confidence, every step of the way.

We offer multiple subscription options for you:
-$4.99/week
-$9.99/month
-$49.99/year
• Payment will be charged to iTunes Account at confirmation of purchase.
• Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period.
• Account will be charged for renewal within 24-hours prior to the end of the current period, and identify the cost of the renewal.
• Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase.
• Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable.

Privacy Policy: https://www.freeprivacypolicy.com/live/5fcb94e8-513e-4ac0-9a64-7f4bcb4e44e1
Terms of Use: https://www.freeprivacypolicy.com/live/a94a49ed-f785-47a8-9cb1-5123409b9077

## Key features

- AI Content Analysis
- Originality & Plagiarism Check
- Humanize Text
- Essay & Content Generator
- AI Audio Detection
- Easy Input & History

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| TextCheck Plans Weekly | $4.99 | per 7 days |
| TextCheck Plans Monthly | $9.99 | per month |
| TextCheck Plans Yearly | $49.99 | per year |



## Frequently asked questions about GPTZero

### What is GPTZero?

GPTZero is a tool designed to help you understand, review, and refine your content. It offers features like AI content analysis, originality checks, and text humanization to ensure your writing feels natural and original.

### Does GPTZero have ads?

GPTZero does not contain advertisements, allowing for an uninterrupted user experience.

### What are the subscription costs for GPTZero?

GPTZero offers several subscription plans: $4.99 per week, $9.99 per month, and $49.99 per year. Payment is handled through your iTunes Account upon purchase confirmation.

### How does GPTZero's subscription renewal work?

Subscriptions automatically renew unless auto-renewal is turned off at least 24 hours before the current period ends. Your account will be charged for renewal within 24 hours prior to the end of the current period.

### Can I manage my GPTZero subscription?

Yes, you can manage your subscriptions and turn off auto-renewal by going to your Account Settings after purchase. Any unused portion of a free trial will be forfeited upon purchasing a subscription.

### What devices is GPTZero available on?

GPTZero is currently supported on iPhone and iPod devices.

### How often is GPTZero updated?

The latest version of GPTZero is 1.0.1, and it was last updated on August 7, 2026. Updates are released to improve functionality and add new features.

### What is the age rating for GPTZero?

GPTZero has an age rating of 4+, making it suitable for a wide range of users.

## Version history (last 5 releases)

### 1.0.1 — 2026-08-07

General bug fixed.

### 1.0.2 — 2026-08-07

Stability updates and bug fixes.

### 1.0.3 — 2026-08-07

Stability updates and bug fixes.

### 1.0.0 — 2026-08-07

No release notes.

### 1.0.6 — 2026-07-08

General Bug fixing.

## More apps by Najmudin Cahyono

- [Zycope: 200x Zoom Lens](https://appshunter.io/ios/app/zycope-200x-zoom-lens/id6755229919)
- [Cell Tower Locator - 5G/4G LTE](https://appshunter.io/ios/app/cell-tower-locator-5g4g-lte/id6755517436)
- [Wink AI: Creative Video FX](https://appshunter.io/ios/app/wink-ai-creative-video-fx/id6756246503)
- [Drone Weather Forecast: Airmap](https://appshunter.io/ios/app/drone-weather-forecast-airmap/id6758935647)
- [Photo Finder AI - GPS & EXIF](https://appshunter.io/ios/app/photo-finder-ai-gps-and-exif/id6759767118)

All apps by Najmudin Cahyono: https://appshunter.io/developer/1852725014

## Related topics

[twaingpt](https://appshunter.io/ios/topics/twaingpt) · [got zero](https://appshunter.io/ios/topics/got-zero) · [gptzero](https://appshunter.io/ios/topics/gptzero) · [najmudin cahyono](https://appshunter.io/ios/topics/najmudin-cahyono) · [essay humanizer](https://appshunter.io/ios/topics/essay-humanizer) · [stealth gpt](https://appshunter.io/ios/topics/stealth-gpt)

---

*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-25.*