# HTML Sprout vs GPT.Zero

The clearest difference is price: GPT.Zero at Free against HTML Sprout's $1.99. HTML Sprout's advantage is in-app purchases (none vs 3) and update cadence (fortnightly vs every 2 months). On ads, device support and iOS requirement there is nothing between them.

GPT.Zero is free to download; HTML Sprout costs $1.99 up front. GPT.Zero sells 3 in-app purchases, starting at $6.99 per 7 days. HTML Sprout asks for nothing beyond the download.

HTML Sprout ships an update fortnightly, GPT.Zero every 2 months. The most recent releases landed on September 28, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | HTML Sprout | GPT.Zero |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | — | **[4.5 (62 ratings)](https://appshunter.io/ios/app/gptzero-ai-undetectable-tool/id6756034715/reviews)** |
| Number of ratings | — | **62** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 2 months |
| Monetization | — | Subscription |
| Size | 1 MB | 2 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Elena Tserioti](https://appshunter.io/developer/1813805989) | [俊 郭](https://appshunter.io/developer/6780973356) |

## What reviewers say

### HTML Sprout

[App page](https://appshunter.io/ios/app/html-sprout/id6755871669)

**In-app purchases:** none


### GPT.Zero

[App page](https://appshunter.io/ios/app/gptzero-ai-undetectable-tool/id6756034715)

Detect AI-generated text and refine your writing to sound more natural. This tool supports various content types and offers quick scanning with history saving. Achieve polished, human-like prose with confidence.

**Highlights:** Multiple AI detectors, Supports all writing types, Quick and easy scanning, Human-like style adjustment, Saved history of checks

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| TextLens Plans Weekly | $6.99 | per 7 days |
| TextLens Plans Monthly | $17.99 | per month |
| TextLens Plans Yearly | $59.99 | per year |


## Frequently asked questions

### Is HTML Sprout free?

HTML Sprout costs $1.99, with no in-app purchases.

### Is GPT.Zero free?

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

### Do HTML Sprout or GPT.Zero have ads?

Neither HTML Sprout nor GPT.Zero shows ads.

### Which is updated more often, HTML Sprout or GPT.Zero?

HTML Sprout ships an update fortnightly, and GPT.Zero every 2 months. Most recently, HTML Sprout was updated on September 28, 2026 and GPT.Zero on October 12, 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.*