# KFEI CSViewer

> KFEI CSViewer (iPhone/iPad app by KAGA FEI Co., Ltd..)

- Source: https://appshunter.io/ios/app/kfei-csviewer/id6771185904 (this page in markdown: same URL + `.md`)
- Developer: [KAGA FEI Co., Ltd.](https://appshunter.io/developer/1635192113)
- Category: Utilities, Developer Tools
- Price: Free
- Age rating: 4+
- Requires: iOS 17.6 · 3 MB
- Languages: English
- Released: 2026-05-21
- Data updated: 2026-06-25
- User reviews in markdown: https://appshunter.io/ios/app/kfei-csviewer/id6771185904/reviews.md

## What is KFEI CSViewer?

This application displays the results of Channel Sounding, which measures the distance between two Bluetooth devices.
It also allows you to configure an offset for the displayed results.


## Version history (last 4 releases)

### 1.0.4 — 2026-06-17

RSSI can now be displayed.

### 1.0.2 — 2026-05-25

The Save and Reset buttons on the settings screen were too narrow, so I widened them slightly to 160px.
I also increased their height to 60px.

### 1.0.1 — 2026-05-22

I made a mistake in the calibration offset process, using addition instead of subtraction.
I corrected the subtraction to addition.

### 1.0 — 2026-05-21

No release notes.

## More apps by KAGA FEI Co., Ltd.

- [KFEI SensorKit](https://appshunter.io/ios/app/kfei-sensorkit/id6446667661)
- [Try Blinky](https://appshunter.io/ios/app/try-blinky/id6479234668)

All apps by KAGA FEI Co., Ltd.: https://appshunter.io/developer/1635192113

## Related topics

[kfei csviewer](https://appshunter.io/ios/topics/kfei-csviewer)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-25.*