# KfB Install vs SI

The clearest difference is update cadence: SI at every 3 days against KfB Install's every 6 weeks. On price, ads, in-app purchases and device support there is nothing between them.

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

KfB Install ships an update every 6 weeks, SI every 3 days. The most recent releases landed on October 23, 2026 and September 11, 2026 respectively.

## The numbers

| Metric | KfB Install | SI |
| --- | --- | --- |
| 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 6 weeks | **Every 3 days** |
| Monetization | Free | — |
| Size | 109 MB | 41 MB |
| Requires iOS | **16.0** | 16.4 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [AMZN Mobile LLC](https://appshunter.io/developer/297606954) | [Sensor Industries](https://appshunter.io/developer/1510183454) |

## What reviewers say

### 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


### SI

[App page](https://appshunter.io/ios/app/si-field/id6762649325)

**In-app purchases:** none


## Frequently asked questions

### Is KfB Install free?

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

### Is SI free?

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

### Do KfB Install or SI have ads?

Neither KfB Install nor SI shows ads.

### Which is updated more often, KfB Install or SI?

KfB Install ships an update every 6 weeks, and SI every 3 days. Most recently, KfB Install was updated on October 23, 2026 and SI on September 11, 2026.

---

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