Comparison

Engine LD vs SymCalc+

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

Head to head
About

Engine LD

Features
Read full description

Engine Layout Definitions (Engine LD) Understand how piston–crank geometry impacts engine performance. • Explore how layout changes affect engine displacement, rated power, and dynamic forces. • View detailed graphs and data lists: • Displacement volume vs. crank angle • Dynamic forces vs. crank angle • Export values for spreadsheet analysis or basic FEA (finite element analysis). • Interactive simulation: adjust crank rotation with a slider to visualize dimension effects on engine packaging.

About

SymCalc+

This app provides advanced mathematical calculations, from basic arithmetic to university-level topics. It combines the functionality of a scientific graphing calculator with the ease of a mobile application, offering symbolic computation and detailed feature explanations.

Highlights
  • Exact arithmetic and numerical modes
  • Symbolic algebra and calculus operations
  • Matrix operations and linear algebra
  • Equation and differential equation solvers
  • Complex number arithmetic
  • Interactive graphing
  • Session management and PDF export
Features
Read full description

Solve equations, simplify algebra, take derivatives and integrals, work with matrices, and visualize results in 2D and 3D from one app. Whether you need an exact symbolic answer, a decimal approximation, or a graph, SymCalc keeps the full workflow in one place. Store your work in reusable sessions, assign variables, define your own functions, and come back to your calculations later. - Solve single equations and systems with exact or numerical results - Simplify, factor, expand, substitute, and find roots, limits, sums, products, and Taylor series - Handle calculus tasks including derivatives, indefinite and definite integrals, and differential equations - Work with matrices and vectors: determinants, inverses, rank, RREF, eigenvalues, eigenvectors, dot products, and cross products - Graph standard functions, implicit equations and inequalities, polar curves, parametric plots, and 3D surfaces - Use logarithmic axes, inspect intersections, and adjust extra variables with sliders - Compute with complex numbers and common scientific functions - Save worksheets, keep multiple sessions, create custom functions, and export your work as PDF or SymCalc files - Learn faster with built-in function help and examples inside the app - Built for students, engineers, scientists, and anyone who needs more than a basic scientific calculator

Screenshots

Engine LD4 screens
SymCalc+4 screens

Verdict

The call

The clearest difference is price: Engine LD at $2.99 against SymCalc+'s $9.99. SymCalc+'s advantage is update cadence (every 5 weeks vs every 5 months). On ads, in-app purchases, device support and iOS requirement 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

Engine LD costs $2.99 and SymCalc+ $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Engine LD ships an update every 5 months, SymCalc+ every 5 weeks. The most recent releases landed on October 9, 2026 and October 4, 2026 respectively.

Scorecard2 real differences · 8 level
Engine LD versus SymCalc+: the parameters behind the verdict, then further details
ParameterEngine LDSymCalc+
Price$2.99 — better$9.99
Rating—4.7 (91 ratings) — better
Positive reviews—73.7% of reviews
Number of ratings—91 — better
Update frequencyEvery 5 monthsEvery 5 weeks — better
AdsNoNo
In-app purchasesNoNo
Monetization—Paid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.013.0
Further details — not scored
Size10 MB46 MB
Age rating4+4+
DeveloperDRH YAZILIM VE MUHENDISLIK HIZMETLERI LTD STIVoxeloid Kft.

In-app purchases

None

Engine LD

No in-app purchases

None

SymCalc+

No in-app purchases

Questions

Is Engine LD free?
Engine LD costs $2.99, with no in-app purchases.
Is SymCalc+ free?
SymCalc+ costs $9.99, with no in-app purchases.
Do Engine LD or SymCalc+ have ads?
Neither Engine LD nor SymCalc+ shows ads.
Which is updated more often, Engine LD or SymCalc+?
Engine LD ships an update every 5 months, and SymCalc+ every 5 weeks. Most recently, Engine LD was updated on October 9, 2026 and SymCalc+ on October 4, 2026.

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