# SureProof vs GPTZero

The clearest difference is review sentiment: GPTZero at 70% against SureProof's 0%. GPTZero also leads on update cadence (weekly vs every 2 months). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. SureProof sells 10 in-app purchases, starting at $3.99 per 7 days and GPTZero sells 5 in-app purchases, starting at $7.99 per month. Whichever you choose, the download price is not the number that matters.

SureProof ships an update every 2 months, GPTZero weekly. The most recent releases landed on October 26, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | SureProof | GPTZero |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.3 (135 ratings)](https://appshunter.io/ios/app/gptzero-ai-detector-humanizer/id6754876362/reviews)** |
| Number of ratings | — | **135** |
| Positive reviews | 0.0% of reviews | **70.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Weekly** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 64 MB | 25 MB |
| Requires iOS | **15.0** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [4vor4 UG](https://appshunter.io/developer/1546718268) | [Appzone Dijital Hizmetler Anonim Sirketi](https://appshunter.io/developer/1844869089) |

## What reviewers say

### SureProof

[App page](https://appshunter.io/ios/app/sureproof-ai-detector/id6738951583)

Instantly detect AI-generated text and humanize it to ensure your writing is authentic and undetectable. This tool also includes plagiarism checking and readability analysis for polished content.

**Highlights:** AI Text Detector, AI Humanizer & Paraphrase Tool, Undetectable AI Output, Plagiarism Check, Text Reading Ease Evaluation, Scan History

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly SureProof+ Subscription | $3.99 | per 7 days |
| Weekly SureProof+ Subscription | $4.99 | per 7 days |
| Monthly SureProof Subscription | $6.99 | per month |
| Monthly SureProof Subscription | $9.99 | per month |
| Quarter SureProof Subscription | $14.99 | per 3 months |
| Quarter SureProof Subscription | $24.99 | per 3 months |
| Annual SureProof+ Subscription | $34.99 | per year |
| Annual SureProof+ Subscription | $59.99 | per year |
| Lifetime Pro Subscription | Free | one-time |
| Lifetime Pro Subscription | $79.99 | one-time |


### GPTZero

[App page](https://appshunter.io/ios/app/gptzero-ai-detector-humanizer/id6754876362)

This tool analyzes text, images, videos, and audio to determine if content was created by AI or a human. It provides detailed breakdowns of detection results and includes a plagiarism checker for authenticity. An AI humanizer feature also helps transform AI-generated text into natural language.

**Highlights:** AI content detection for text, images, video, and audio, Detailed analysis of AI detection scores, AI Humanizer to naturalize AI-generated text, Plagiarism checker for content authenticity, Clear AI percentage scoring system, Supports iPhone and iPad

**Features:** macOS Compatibility

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| AI Detector Monthly Pro | $7.99 | per month |
| AI Detector Weekly Trial | $9.99 | per 7 days |
| AI Detector Monthly Premier | $14.99 | per month |
| AI Detector Yearly Pro | $24.99 | per year |
| AI Detector Yearly Premier | $29.99 | per year |


## Frequently asked questions

### Is SureProof free?

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

### Is GPTZero free?

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

### Do SureProof or GPTZero have ads?

Neither SureProof nor GPTZero shows ads.

### Which is updated more often, SureProof or GPTZero?

SureProof ships an update every 2 months, and GPTZero weekly. Most recently, SureProof was updated on October 26, 2026 and GPTZero on October 25, 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.*