Comparison

Plan 9 vs Sarrus Calculator Matrix Det

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

Head to head
About

Plan 9

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Looking for a flexible way to estimate the relative complexity of your development goals? Scrum poker is a consensus-based technique for estimating, often used to estimate effort or relative complexity of tasks in software development. Team members produce estimates by choosing numbered cards, and then discuss the result. By having all group members choose without knowing the choices of the other members, possible bias in favour of the first number called is avoided. The set of numbers used may differ according to the circumstances. Plan 9 offers a range of story point sequences for everyone's estimation gaming needs. Choose your own font and colour to express your creativity. No ads, frills or company logos. Put the fun back into those functional planning meetings! Features - Choose from all fonts available on your device - Intuitive colour wheel - Select from various estimation ranges

About

Sarrus Calculator Matrix Det

Features
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Sarrus Rule Calculator: 3x3 Determinants Made Easy Stop struggling with manual matrix calculations! Whether you are a linear algebra student or a professional engineer, the Sarrus Rule Calculator is the fastest way to solve the determinant of any 3x3 matrix. Eliminate human error and get instant results with the only dedicated Sarrus tool on the App Store. Why use the Sarrus Rule? The Rule of Sarrus is a visual and intuitive method for finding the determinant of a third-order matrix. By appending the first two columns to the end of the matrix and calculating the products of the diagonals, you can find the solution without the complexity of expansion by cofactors. Key Features: Instant Results: Simply input your nine values and get the determinant immediately. Simple UI: A clean, distraction-free interface designed for quick data entry. Perfect for Learning: Use it to verify your homework or study for your next Math exam. Reliable & Accurate: Powered by a precise calculation engine to ensure your results are always correct. Get your determinant instantly! Download the Sarrus Rule Calculator today and take the stress out of Linear Algebra! PRO FEATURES ELEGANT DARK MODE Study or work comfortably in any lighting. Our beautiful Dark Mode is easy on the eyes, perfect for late-night sessions or use in any professional setting. AI EXPLANATIONS (New!) Don't just get the answerβ€”understand it. Our revolutionary AI feature provides a clear, step-by-step breakdown of the calculation. It instantly solves and explains the step by step calculation, making it the perfect educational tool. A subscription is needed to unlock PRO features including Dark mode and AI Explanation. Payment will be charged to your Apple ID account upon confirming the purchase. Subscriptions automatically renew unless canceled at least 24 hours before the end of the current period. Your account will be charged for renewal within 24 hours prior to the end of the current period. You can manage or cancel your subscription at any time from your account settings in the App Store. Sarrus Calculator PRO Weekly price: $3.99 Sarrus Calculator PRO Yearly price: $24.99 Read the EULA Terms in the following link https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Plan 94 screens
Sarrus Calculator Matrix Det4 screens

Verdict

The call

The clearest difference is in-app purchases: Plan 9 at none against Sarrus Calculator Matrix Det's 2. Plan 9 also leads on ads (none vs shown). Sarrus Calculator Matrix Det's advantage is update cadence (every 2 months vs every 24 months). On price, device support and iOS requirement there is nothing between them.

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

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. Sarrus Calculator Matrix Det sells 2 in-app purchases, starting at $4.99 per 7 days. Plan 9 asks for nothing beyond the download.

UpkeepUpdate frequency

Plan 9 ships an update every 24 months, Sarrus Calculator Matrix Det every 2 months. The most recent releases landed on October 27, 2026 and October 28, 2026 respectively.

Scorecard3 real differences Β· 3 level
Plan 9 versus Sarrus Calculator Matrix Det: the parameters behind the verdict, then further details
ParameterPlan 9Sarrus Calculator Matrix Det
PriceFreeFree
Update frequencyEvery 24 monthsEvery 2 months β€” better
AdsNo β€” betterYes
In-app purchasesNo β€” betterYes
DevicesiPhone, iPodiPhone, iPad, iPod β€” better
Requires iOS14.0 β€” better15.0
Further details β€” not scored
Size1 MB144 MB
Age rating4+4+
DeveloperPaul EvenblijJuan Antonio Veloz Gutierrez

In-app purchases

None

Plan 9

No in-app purchases

2 purchases

Sarrus Calculator Matrix Det

Subscriptions2
  • PRO Sarrus Calculator Weekly3 Days trial$4.997 Days
  • PRO Sarrus Calculator Yearly$24.991 Year

Questions

Is Plan 9 free?
Plan 9 is free to download, with no in-app purchases.
Is Sarrus Calculator Matrix Det free?
Sarrus Calculator Matrix Det is free to download, with in-app purchases available.
Do Plan 9 or Sarrus Calculator Matrix Det have ads?
Sarrus Calculator Matrix Det shows ads; Plan 9 does not.
Which is updated more often, Plan 9 or Sarrus Calculator Matrix Det?
Plan 9 ships an update every 24 months, and Sarrus Calculator Matrix Det every 2 months. Most recently, Plan 9 was updated on October 27, 2026 and Sarrus Calculator Matrix Det on October 28, 2026.

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