Engine LD vs SymCalc+
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Engine LD
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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.
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.
- 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
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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
Verdict
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
Engine LD costs $2.99 and SymCalc+ $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.
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.
| Parameter | Engine LD | SymCalc+ |
|---|---|---|
| Price | $2.99 — better | $9.99 |
| Rating | — | 4.7 (91 ratings) — better |
| Positive reviews | — | 73.7% of reviews |
| Number of ratings | — | 91 — better |
| Update frequency | Every 5 months | Every 5 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 | 13.0 |
| Further details — not scored | ||
| Size | 10 MB | 46 MB |
| Age rating | 4+ | 4+ |
| Developer | DRH YAZILIM VE MUHENDISLIK HIZMETLERI LTD STI | Voxeloid Kft. |
In-app purchases
Engine LD
No in-app purchases
SymCalc+
No in-app purchases









