# Haikan Pipit vs KeyWK

The clearest difference is in-app purchases: KeyWK at none against Haikan Pipit's 2. KeyWK also leads on ads (none vs shown) and iOS requirement (13.0 vs 15.6). Haikan Pipit's advantage is update cadence (every 3 weeks vs every 2 months). On price and device support there is nothing between them.

Both are free to download. Haikan Pipit sells 2 in-app purchases, starting at $3.99 per month. KeyWK asks for nothing beyond the download.

Haikan Pipit ships an update every 3 weeks, KeyWK every 2 months. The most recent releases landed on November 4, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Haikan Pipit | KeyWK |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 3 weeks** | Every 2 months |
| Monetization | Free with in-app purchases | — |
| Size | 226 MB | 31 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [NETSTILL LIMITED LIABILITY CO.](https://appshunter.io/developer/1718197858) | [シーテック株式会社](https://appshunter.io/developer/1543368811) |

## What reviewers say

### Haikan Pipit

[App page](https://appshunter.io/ios/app/haikan-pipit/id6473008995)

Calculate precise cut lengths for various pipe fittings and view their dimensions in a 3D catalog. Supports multiple fitting types with plans for future additions like sharing and quantity estimation.

**Highlights:** Cut length calculation for fitting combinations, 3D pipe catalog with dimension drawings, Support for DV, TS/HI, HT, White-thread, Water Supply Core, Butt-weld, and Stainless Press-Type fittings, Future updates planned for sharing and quantity estimation, View pipe and fitting shapes and dimensions

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| プロ版（1ヶ月） | $3.99 | per month |
| プロ版（1年間） | $39.99 | per year |


### KeyWK

[App page](https://appshunter.io/ios/app/keywk/id6749286682)

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

**In-app purchases:** none


## Frequently asked questions

### Is Haikan Pipit free?

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

### Is KeyWK free?

KeyWK is free to download, with no in-app purchases.

### Do Haikan Pipit or KeyWK have ads?

Haikan Pipit shows ads; KeyWK does not.

### Which is updated more often, Haikan Pipit or KeyWK?

Haikan Pipit ships an update every 3 weeks, and KeyWK every 2 months. Most recently, Haikan Pipit was updated on November 4, 2026 and KeyWK on October 30, 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.*