# 工事完了確認書 vs KfB Install

The clearest difference is update cadence: KfB Install at every 2 months against 工事完了確認書's every 5 months. 工事完了確認書's advantage is device support (3 vs 1) and iOS requirement (13.0 vs 16.0). On price, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

工事完了確認書 ships an update every 5 months, KfB Install every 2 months. The most recent releases landed on October 7, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | 工事完了確認書 | KfB Install |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.7 (14 ratings)](https://appshunter.io/ios/app/kfb-install/id1510007973/reviews)** |
| Number of ratings | — | **14** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 2 months** |
| Monetization | — | Free |
| Size | 14 MB | 108 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [NESPE CO.,LTD.](https://appshunter.io/developer/1171292889) | [AMZN Mobile LLC](https://appshunter.io/developer/297606954) |

## What reviewers say

### 工事完了確認書

[App page](https://appshunter.io/ios/app/id1465563252)

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

**In-app purchases:** none


### KfB Install

[App page](https://appshunter.io/ios/app/kfb-install/id1510007973)

This app enables technicians to install and maintain smart access devices for residential buildings. It facilitates controlled entry for delivery drivers, streamlining package delivery and reducing building staff involvement. The system ensures secure, one-time access after multi-step driver authentication.

**Highlights:** Device installation and maintenance, Controlled access for delivery drivers, Integration with existing access systems, Multi-step driver authentication, Package delivery facilitation

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is 工事完了確認書 free?

工事完了確認書 is free to download, with no in-app purchases.

### Is KfB Install free?

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

### Do 工事完了確認書 or KfB Install have ads?

Neither 工事完了確認書 nor KfB Install shows ads.

### Which is updated more often, 工事完了確認書 or KfB Install?

工事完了確認書 ships an update every 5 months, and KfB Install every 2 months. Most recently, 工事完了確認書 was updated on October 7, 2026 and KfB Install on October 20, 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.*