# GPTZero vs SmoothKey

The clearest difference is update cadence: SmoothKey at every 2 days against GPTZero's every 8 days. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. GPTZero sells 5 in-app purchases, starting at $7.99 per month and SmoothKey sells 3 in-app purchases, starting at $6.99 per 7 days. Whichever you choose, the download price is not the number that matters.

GPTZero ships an update every 8 days, SmoothKey every 2 days. Both last shipped on October 31, 2026.

## The numbers

| Metric | GPTZero | SmoothKey |
| --- | --- | --- |
| 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 | 70.4% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 8 days | **Every 2 days** |
| Monetization | Free with in-app purchases | — |
| Size | 25 MB | 4 MB |
| Requires iOS | 16.6 | **16.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [Appzone Dijital Hizmetler Anonim Sirketi](https://appshunter.io/developer/1844869089) | [Tehui Ruanzhuo (Weifang) Enterprise Management Consulting Co., Ltd.](https://appshunter.io/developer/6787476365) |

## What reviewers say

### GPTZero

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

This tool helps determine if content is human-written or AI-generated. It offers detailed analysis, a plagiarism checker, and an AI humanizer to refine text. Ensure your content's originality and authenticity with advanced detection technology.

**Highlights:** AI content detection, In-depth analysis, AI humanizer, Plagiarism checker, Content scoring

**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 |


### SmoothKey

[App page](https://appshunter.io/ios/app/smoothkey-ai-chat-coach/id6805464765)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| RizzKey Pro Weekly | $6.99 | per 7 days |
| RizzKey Pro Annual | $69.00 | per year |
| RizzKey Pro Lifetime | $69.99 | one-time |


## Frequently asked questions

### Is GPTZero free?

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

### Is SmoothKey free?

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

### Do GPTZero or SmoothKey have ads?

Neither GPTZero nor SmoothKey shows ads.

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

GPTZero ships an update every 8 days, and SmoothKey every 2 days. Most recently, GPTZero was updated on October 31, 2026 and SmoothKey on October 31, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*