# NullGPT vs Diff Checker

The clearest difference is iOS requirement: Diff Checker at 13.0 against NullGPT's 15.6. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. NullGPT sells 2 in-app purchases, starting at $6.99 per 7 days and Diff Checker sells 2 in-app purchases, starting at $7.99 per month. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | NullGPT | Diff Checker |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | — | Fortnightly |
| Size | 28 MB | 79 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Sebin Varghese](https://appshunter.io/developer/1756459350) | [Edusoft Limited](https://appshunter.io/developer/1836364875) |

## What reviewers say

### NullGPT

[App page](https://appshunter.io/ios/app/nullgpt-anti-ai-detector/id6741625792)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Subscription Weekly | $6.99 | per 7 days |
| Premium Subscription Monthly | $19.99 | per month |


### Diff Checker

[App page](https://appshunter.io/ios/app/diff-checker-compare-text/id6753902567)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Subscription Monthly | $7.99 | per month |
| Premium Subscription Yearly | $49.99 | per year |


## Frequently asked questions

### Is NullGPT free?

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

### Is Diff Checker free?

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

### Do NullGPT or Diff Checker have ads?

Neither NullGPT nor Diff Checker shows ads.

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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.*