Comparison

Geometry!! vs Q8Cis

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Geometry!!

Learn geometry with interactive 2D and 3D visualizations. This app offers automatic calculations for area, perimeter, and volume, along with trigonometric values. It's designed for students, teachers, and math enthusiasts to make learning math engaging and accessible.

Highlights
  • Interactive 3D visualizations
  • 2D and 3D shape details
  • Automatic area, perimeter, volume calculations
  • Trigonometric values
  • Modern, optimized interface
Features
Read full description

Geometry – Learn Geometry in Practice Discover geometry in a modern, interactive way! Perfect for students, teachers, and math enthusiasts. Master 2D and 3D shapes with clear visuals, automatic calculations, and an intuitive interface. What’s New: New 3D Shapes: Explore solids and their properties. Area, Perimeter & Volume: Automatic calculations for all shapes. Fully compatible with iOS 26: Faster, smoother performance. Features: Interactive 3D visualizations. Detailed drawings of flat and solid figures. Instant calculations: area, perimeter, and volume. Trigonometric values: sine, cosine, tangent, cotangent. Modern interface optimized for the latest iOS. Geometry makes learning math simple and enjoyable — at school, at home, or on the go!

About

Q8Cis

Features
Read full description

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

Screenshots

Geometry!!4 screens
Q8Cis2 screens

Verdict

The call

The clearest difference is in-app purchases: Q8Cis at none against Geometry!!'s 2. Q8Cis also leads on ads (none vs shown) and iOS requirement (16.6 vs 26.0). Geometry!!'s advantage is update cadence (every 7 months vs every 38 months). On price and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Geometry!! sells 2 in-app purchases, starting at $0.99 per year. Q8Cis asks for nothing beyond the download.

UpkeepUpdate frequency

Geometry!! ships an update every 7 months, Q8Cis every 38 months. The most recent releases landed on August 3, 2026 and September 10, 2026 respectively.

Scorecard4 real differences · 6 level
Geometry!! versus Q8Cis: the parameters behind the verdict, then further details
ParameterGeometry!!Q8Cis
PriceFreeFree
Rating4.5 (56 ratings) — better—
Positive reviews66.7% of reviews—
Number of ratings56 — better—
Update frequencyEvery 7 months — betterEvery 38 months
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad — betteriPhone
Requires iOS26.016.6 — better
Further details — not scored
Size57 MB10 MB
Age rating9+4+
DeveloperZbigniew OsadaKhaled Alsalem

In-app purchases

2 purchases

Geometry!!

Subscriptions1
  • Yearly$0.991 Year
One-time1
  • Lifetime$1.99
None

Q8Cis

No in-app purchases

Questions

Is Geometry!! free?
Geometry!! is free to download, with in-app purchases available.
Is Q8Cis free?
Q8Cis is free to download, with no in-app purchases.
Do Geometry!! or Q8Cis have ads?
Geometry!! shows ads; Q8Cis does not.
Which is updated more often, Geometry!! or Q8Cis?
Geometry!! ships an update every 7 months, and Q8Cis every 38 months. Most recently, Geometry!! was updated on August 3, 2026 and Q8Cis on September 10, 2026.

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