Comparison

Steiner Tree vs Signals and Systems

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

Head to head
About

Steiner Tree

Features
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This app computes Steiner trees using an evolutionary algorithm. You can place, drag, and delete points of your tree. The optimal number and position of Steiner points is computed. A minimal spanning tree (MST) connects a given set of points in a plane so that the sum of all edges is minimal. Often this sum of all edges can be reduced, if additional points are added. These points are called Steiner points, and the corresponding minimal spanning tree Steiner tree. If more than 3 points are given, it is a hard optimization problem to compute the optimal number and position of Steiner points. This app uses a simple evolutionary algorithm for demonstration purposes. It uses a population of individuals. Each individual represents a MST containing some Steiner points. The population develops towards the optimal Steiner tree in an evolutionary loop: Initially, each individual sets random Steiner points, and constructs the corresponding Steiner tree. The minimal length of the Steiner tree in the population is stored. Each individual has now a fitness value, which is the higher, the closer its Steiner tree length is to the minimal length in the population. Fitter individuals have more descendants by reproduction, and less fit individuals die out. In order to explore better solutions, reproduction does not create descendants that are identical to the parent individual, i.e. do not have their Steiner points at the same position. Rather these positions are shifted randomly by mutation, using a Gaussian distribution. How far they are shifted on average is determined also by their fitness: Good individuals shift their Steiner points less than worse individuals. How fast a good solution is found, depends thus on the population size, and the mutation strength.

About

Signals and Systems

Features
Read full description

Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://forwaelade.web.app/SignalsSystems/privacy-policy Boost your understanding of Signals and Systems with our interactive engineering quiz app! Designed for students, engineers, and enthusiasts, this app covers key concepts and applications in Signals and Systems to help you ace exams, prepare for interviews, and enhance your technical skills. Features: Comprehensive Topics: Dive into Fourier analysis, Laplace transforms, Z-transforms, convolution, modulation, and more. Perfectly tailored for beginners and advanced learners alike. Interactive Quizzes: Test your knowledge with multiple-choice questions, numerical problems, and real-world application scenarios. Detailed Explanations: Learn as you go with in-depth explanations for every question. Progress Tracking: Monitor your performance, identify weak areas, and work on them effectively. Modern Tools: Includes coverage of time-frequency analysis, digital filter design, and emerging trends in signal processing. Whether you're studying for exams, preparing for competitive tests, or brushing up on core concepts, this app is your ultimate learning partner for mastering Signals and Systems. Download now and take your engineering skills to new heights!

Screenshots

Steiner Tree1 screens
Signals and Systems4 screens

Verdict

The call

The clearest difference is in-app purchases: Steiner Tree at none against Signals and Systems's 6. Steiner Tree also leads on device support (3 vs 1) and iOS requirement (12.0 vs 17.0). Signals and Systems's advantage is update cadence (every 5 weeks vs every 45 months). On price and ads there is nothing between them.

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

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Signals and Systems sells 6 in-app purchases, starting at $9.99 per month. Steiner Tree asks for nothing beyond the download.

UpkeepUpdate frequency

Steiner Tree ships an update every 45 months, Signals and Systems every 5 weeks. The most recent releases landed on October 19, 2026 and October 7, 2026 respectively.

Scorecard4 real differences ยท 2 level
Steiner Tree versus Signals and Systems: the parameters behind the verdict, then further details
ParameterSteiner TreeSignals and Systems
PriceFreeFree
Update frequencyEvery 45 monthsEvery 5 weeks โ€” better
AdsNoNo
In-app purchasesNo โ€” betterYes
DevicesiPhone, iPad, iPod โ€” betteriPhone
Requires iOS12.0 โ€” better17.0
Further details โ€” not scored
Size1 MB18 MB
Age rating4+4+
DeveloperReinhard MAENNERForwa Elade Wunde

In-app purchases

None

Steiner Tree

No in-app purchases

6 purchases

Signals and Systems

Subscriptions3
  • 1 Month$9.991 Month
  • 6 Months$19.996 Months
  • 1 Year$29.991 Year
One-time3
  • 1500$0.99
  • 3500$1.99
  • 9000$3.99

Questions

Is Steiner Tree free?
Steiner Tree is free to download, with no in-app purchases.
Is Signals and Systems free?
Signals and Systems is free to download, with in-app purchases available.
Do Steiner Tree or Signals and Systems have ads?
Neither Steiner Tree nor Signals and Systems shows ads.
Which is updated more often, Steiner Tree or Signals and Systems?
Steiner Tree ships an update every 45 months, and Signals and Systems every 5 weeks. Most recently, Steiner Tree was updated on October 19, 2026 and Signals and Systems on October 7, 2026.

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