# HTMLKit vs WhatDiff

The clearest difference is iOS requirement: WhatDiff at 16.4 against HTMLKit's 18.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. HTMLKit sells 1 one-off in-app purchase and WhatDiff sells 3 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

Both ship on a similar rhythm, roughly every 5 months. The most recent releases landed on September 18, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | HTMLKit | WhatDiff |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | Every 5 months |
| Size | 6 MB | 2 MB |
| Requires iOS | 18.0 | **16.4** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [FebesGoods Studio](https://appshunter.io/developer/597141225) | [栋 陈](https://appshunter.io/developer/560090281) |

## What reviewers say

### HTMLKit

[App page](https://appshunter.io/ios/app/htmlkit/id6759825001)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Version | $2.99 | one-time |


### WhatDiff

[App page](https://appshunter.io/ios/app/whatdiff/id6762343310)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| WhatDiff Month Subscription | $2.99 | per month |
| WhatDiff Annual Subscription | $12.99 | per year |
| WhatDiff Lifetime License | $24.99 | one-time |


## Frequently asked questions

### Is HTMLKit free?

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

### Is WhatDiff free?

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

### Do HTMLKit or WhatDiff have ads?

Neither HTMLKit nor WhatDiff shows ads.

### Which is updated more often, HTMLKit or WhatDiff?

HTMLKit ships an update every 5 months, and WhatDiff every 5 months. Most recently, HTMLKit was updated on September 18, 2026 and WhatDiff on September 8, 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.*