A great scientific calculator can significantly enhance productivity in studies, research, and engineering. In this article, we compare five of the most popular calculators on the market based on price, features, and design, with a focus on the unique advantages of the TIANYAN 991EX.
一.Evaluation Criteria
Whether it's worth the cost and offers great value for money.
Types of calculations supported (e.g., algebra, matrices, calculus, statistics, basic programming).
Display quality, keyboard layout, portability, and user experience.
Overview of the Top 5 Models in 2025
| Brand/Model | Key Features | Design Features |
| TIANYAN 991EX | Programming support, matrices, calculus, distributions, statistics | High-res screen, ergonomic keys, long battery life |
| CASIO fx-991CW | functions, icon menu | Bright LCD, student-friendly design |
| SHARP EL-W506T | WriteView math display, engineering mode | Multi-line display, slightly complex |
| Canon F-789SGA | Dual power, statistics, basic functions | Conventional keypad, basic dot-matrix screen |
What Sets the TIANYAN 991EX Apart
✅ Supports algebra, functions, matrices, calculus, equations, and statistics—plus compatibility with basic programming languages for STEM and teaching use.
✅Clear graphical display with a Chinese-language menu system—great for viewing complex expressions and results at a glance.
✅Dual power system (solar + battery) with a low-power chip for years of worry-free use.
✅Slip-resistant keys, optimized layout, and lightweight body for all-day comfort.
Who Should Choose What
| User Type | Recommended Models | Reason |
|---|---|---|
| Students | HP 10s+, Canon F-789SGA | Affordable, meets basic needs |
| STEM Students | TIANYAN 991EX, fx-991CW | Comprehensive features for complex subjects |
| Teachers & Researchers | TIANYAN 991EX | Programming & advanced math support |
Conclusion
Scientific calculators have evolved into essential tools for modern learners and professionals. Among all new entries in 2024, the TIANYAN 991EX stands out for its programming compatibility, versatile features, premium display, and thoughtful design—making it the best choice for STEM users.
🎥Want to see the TIANYAN 991EX in action? Watch our hands-on demo here
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