# Q8Cis

> Q8Cis (iPhone/iPad app by Khaled Alsalem.)

- Source: https://appshunter.io/ios/app/q8cis/id1444540855 (this page in markdown: same URL + `.md`)
- Developer: [Khaled Alsalem](https://appshunter.io/developer/1441688302)
- Category: Education, Weather
- Price: Free
- Age rating: 4+
- Requires: iOS 16.6 · 10 MB
- Languages: American English
- Released: 2018-11-28
- Data updated: 2026-06-01
- User reviews in markdown: https://appshunter.io/ios/app/q8cis/id1444540855/reviews.md

## What is Q8Cis?

Q8Cis Apps is an Engineering applications  for :
 - 1D Hydrodynamic's Prediction for Arabian Gulf waters [based on KGulf model {Al-Salem 2009}]
Tidal range and the speed of the current can affect
     Shipping - entering/leaving harbours, coastal areas
     Information for study effect of sediment/pollutant transport.
     Coastal fishing 
This Apps allows user to setup a station in Arabian Gulf waters for Hydrodynamic's Prediction at selected [Longitude/Latitude]. Based on the 
amplitude and phase a harmonic constituents (22 constituents) will be predicted and used. Also it can be recall at any time from stored file in Directory for more prediction. Time limit for water hydrodynamic prediction can be from 1979 to 2035. Hourly Display.  
- Global Water Level Prediction [based on KTide model {Al-Salem 2004} ]
    Prediction of tidal variations is of importance in a wide range of practical applications such as: Navigation through inter-coastal    
waterways, and within estuaries, bays, harbors and fishing. The information provided by this apps can be further used as input for tidal circulation models. Q8Cis apps is capable to predict water level variation due to tides at a number of stations [1325 stations] in the Global waters. The apps will display for user a number of Continents Icon to select a station as follow: 
        Asia Region 
        Africa Region 
        Europe Region 
        North America Region
        South America Region 
 
Time limit can be select from 1979 to 2035. Hourly Display. 
 Q8Cis apps provide data Analysis for
    Data Table output
    Predicted tidal harmonic constituents for the selected location
    Tidal current Statistic of Frequency table [For 1D Hydrodynamic's tidal current Prediction] 
    Tidal current Rose Plot [For 1D Hydrodynamic's tidal current Prediction]
Q8CIS app results was validated with other model for tidal current and water levels prediction it was found to provide good results.
For more Information on model simulation and validation go to website at  http://hceatkuwait.net/request/CIS-app-report.pdf 
Q8Cis apps can share Predicted result by Email with attachment file. 
For more Information go to :
  -The internet Version: http://hceatkuwait.net/web_pas/Global-KTide/GKTide.aspx [ for Global Tide prediction]
  -Apps information go to: http://hceatkuwait.net/request/Data_iphone.htm


## Version history (last 3 releases)

### 1.5 — 2025-01-26

The Q8CIS application was updated to include all new features in accordance with the App Store Review Guidelines. 
The Q8CIS application is being updated to reflect the following: 
Increase the number of stations in the GKtide Section to facilitate the prediction of water levels. 
The navigation bar issue has been resolved.
It functions satisfactorily on IOS 16.
A collection of model descriptions that deal to the simulation of the input data also was updated.

### 1.4 — 2021-12-21

Q8CIS app was updated to all new features regard App Store Review Guidelines.
Q8CIS app was updated and tested on IOS 14.4  it run ok.
A set of model description on the simulation of Requested input data

### 1.0 — 2018-11-27

No release notes.

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## More apps by Khaled Alsalem

- [Q8Brod](https://appshunter.io/ios/app/q8brod/id1443053895)
- [KSurge](https://appshunter.io/ios/app/ksurge/id1443769247)
- [Q8Sea](https://appshunter.io/ios/app/q8sea/id1445057467)
- [KOil](https://appshunter.io/ios/app/koil/id1446544213)
- [Q8bar](https://appshunter.io/ios/app/q8bar/id1580312682)

All apps by Khaled Alsalem: https://appshunter.io/developer/1441688302

## Related topics

[q8cis](https://appshunter.io/ios/topics/q8cis)

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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 2026-06-01.*