# IWI Déjà-vu — Eyewitness Interview using AR

> Eyewitness Interview using AR (iPhone/iPad app by Marcus Bauer.)

- Source: https://appshunter.io/ios/app/iwi-deja-vu/id1390367322 (this page in markdown: same URL + `.md`)
- Developer: [Marcus Bauer](https://appshunter.io/developer/495551276)
- Category: Business, Navigation
- Price: $2.99
- Age rating: 4+
- Requires: iOS 12.0 · 499 MB
- Languages: American English
- Released: 2018-08-23
- Data updated: 2026-05-18
- User reviews in markdown: https://appshunter.io/ios/app/iwi-deja-vu/id1390367322/reviews.md

## What is IWI Déjà?

This app supports witness interviews for flight incident/accident investigation. 
Based on Augmented-Reality (AR) technology, the witness can place virtually the observed aircraft. Further the observed flight can be animated in real-time and recorded. The flight data is calculated by the app, providing latitude, longitude, altitude of the aircraft and timestamp.
The collected data can be exported and used for accident investigation and accident report.
Further the gathered data can be used together with the other products / services provided by iwi® (www.iwiation.com) to perform flight path and flight accident situation reconstruction.
The animation can be recorded with the Apple screen recording that is available since IOS 11.

The app uses latest AR technology therefore the following minimum requirements are:
- IOS 11 or later
- iPhones 6s or later
- iPad 2017 or later

Function:
- Set dimensions (feet, meter) and airspeed (kts, km/h)
- 3D Models for Helicopter: EC135, EC145
- 3D Models for Airplanes: Piper, Cessna, A319
- 3D Models for Military: T38 Talon, Antonov AN24, UH60 Blackhawk
- 3D Models for Paraglider
- Place 3D model at three different virtual positions at different locations (if needed)
- Set attitude of 3D model at three virtual positions
- Virtual GPS location for each position is calculated and interpolated during animation
- Animation of flight path, interpolated between three virtual positions (linear or spline)
- Set observed time in seconds between virtual position 1 & 2 and 2 & 3
- Virtual TrueAirSpeed is calculated based on location and defined time
- Show actual GPS position and virtual flightpath on a map
- Export calculated data via email function
- Screenshots of positions placed in local photo library

Further detailed information about this app, the method and accident investigations that have supported with this method, can be found at http://www.iwiation.com

A detailed documentation about all functions of the app can be found at: http://www.iwiation.com/app-deacutejagrave-vu.html

© Dr. M. Bauer 2007 - 2020


## Version history (last 5 releases)

### 3.0 — 2022-11-20

Fix IOS compatibility

### 2.3 — 2020-07-16

- When exporting session data via email, screenshots of all three positions are now stored in your local photo library. This data may be used for later report documentation.
- IOS and performance update.

### 2.2 — 2020-06-14

Bugfix: Device heading/azimuth shows now true north value

### 2.1 — 2020-05-26

Bugfix Heading Interpolation.
Performance and Stability Update and Improvement.
Models for Paraglider and A319 have been added.
Added map to show the location of the virtual aircraft flight path.
Added Email export, to export individual comments and the calculated flight path with timestamp, position and attitude data via email.

### 1.7 — 2019-07-09

Performance improvement and bug fix iPad Pro stability

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## More apps by Marcus Bauer

- [iwiAI](https://appshunter.io/ios/app/iwiai/id6448662937)
- [iwiEyeInterview](https://appshunter.io/ios/app/iwieyeinterview/id6670158673)

All apps by Marcus Bauer: https://appshunter.io/developer/495551276

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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 2026-05-18.*