Comparison

Star Guide vs Simplex Linear Programming

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

Head to head
About

Star Guide

Transform your device into a real-time planetarium to explore the night sky. Identify stars and planets, and plan optimal viewing times. Experience celestial objects in 3D and preview future or past sky conditions from any location.

Highlights
  • Real-time star and planet identification
  • Augmented Reality sky overlay
  • 3D celestial object visualization
  • Best viewing time notifications
  • Sky time travel (past/future)
  • Location-based sky preview
Features
Read full description

Turn your phone into a real‑time planetarium. Star Guide helps you explore the night sky, identify stars and planets, and plan the best moments to look up—whether you’re stargazing tonight or previewing the sky months from now. Point your device upward to see what’s above you, switch on Augmented Reality (AR) for an immersive sky overlay, and explore celestial objects in 3D. Want to plan ahead? Travel through time to see how the sky changes in the past or future, and preview the view from different locations around the world. Key features • Live star finder & planetarium view Explore the night sky based on your position and direction. • Augmented Reality mode Overlay stars and planets on your camera view for easy identification. • 3D stars & planets Visualize objects in a more immersive way and explore in 3D. • Best viewing time notifications Get alerts for great stargazing moments and upcoming viewing opportunities. • 24‑hour sky motion preview See how a star moves and circles across the sky over a full day. • Past & future sky “time travel” Rewind to previous nights or fast‑forward to plan future observations. • Different locations Change your location to preview the sky from other places—perfect for trips. Great for • Casual stargazing from your backyard • Learning the night sky with an interactive planetarium • Planning the best time to spot planets • Exploring how the sky looks from other cities and countries Permissions (why they may be requested) • Location: improves sky accuracy for your current position • Camera: required for AR mode • Notifications: optional alerts for best viewing times Download Star Guide and start exploring the sky—right from your pocket.

About

Simplex Linear Programming

Features
Read full description

Master the mechanics of Linear Programming with an industrial-grade, visual Simplex solver. Whether you are an undergraduate student tackling Operations Research homework or an engineer optimizing complex systems, this app provides a high-performance, native environment to solve and visualize linear models. Built with Apple’s Accelerate Framework (vDSP), the engine performs hardware-accelerated matrix operations for desktop-class speed on your mobile device. Why this is the ultimate optimization tool: Visualize the Feasible Region: See your constraints come to life on an interactive Canvas. Plot the quadrant, identify intersection points, and explore the feasible region with intuitive gestures. The Simplex Journey: Watch the algorithm navigate from the origin to the optimal solution. Our "Visual Walker" tracks every iteration, highlighting each vertex transition with a clear, orange path. Professional Grade Logic: Full support for Big-M and Two-Phase methods. Easily handle ≤, ≥, and = constraints without needing to manually convert your model. Precision Entry: Clean, monospaced interface featuring color-coded inputs for coefficients, objective goals, and variable signs. Education-First Design: Perfect for learning the geometry behind the algebra. Follow the path, analyze the coordinate labels, and see exactly where the "Optimal" solution sits in the coordinate plane. Purely Native: No web wrappers or lag. Experience a fluid SwiftUI interface designed for "Engineering Soul"—performance, clarity, and reliability. Student & Professional Value Proposition For Students: Use it as a powerful "Check Your Work" tool. Compare your manual pivot steps against the visual path and verify your feasible region boundaries. For Professionals: Quickly prototype constraints and objectives on the go with a solver that respects hardware limitations and mathematical rigor.

Screenshots

Star Guide4 screens
Simplex Linear Programming3 screens

Verdict

The call

The clearest difference is price: Star Guide at Free against Simplex Linear Programming's $1.99. Star Guide also leads on iOS requirement (15.5 vs 26.0). Simplex Linear Programming's advantage is in-app purchases (none vs 4). On ads 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

Star Guide is free to download; Simplex Linear Programming costs $1.99 up front. Star Guide sells 4 in-app purchases, starting at $1.99 per 7 days. Simplex Linear Programming asks for nothing beyond the download.

Scorecard3 real differences · 7 level
Star Guide versus Simplex Linear Programming: the parameters behind the verdict, then further details
ParameterStar GuideSimplex Linear Programming
PriceFree — better$1.99
Rating4.5 (4.3K ratings) — better—
Positive reviews26.6% of reviews—
Number of ratings4.3K — better—
Update frequencyEvery 8 days—
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.5 — better26.0
Further details — not scored
Size220 MB9 MB
Age rating4+4+
DeveloperStar registerJorge Lucioni Charalla

In-app purchases

4 purchases

Star Guide

Subscriptions3
  • Weekly$1.997 Days
  • Star-Registration Premium1 Month trial$4.991 Month
  • Annually$29.991 Year
One-time1
  • One time$24.99
None

Simplex Linear Programming

No in-app purchases

Questions

Is Star Guide free?
Star Guide is free to download, with in-app purchases available.
Is Simplex Linear Programming free?
Simplex Linear Programming costs $1.99, with no in-app purchases.
Do Star Guide or Simplex Linear Programming have ads?
Neither Star Guide nor Simplex Linear Programming shows ads.

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