#51

iPepul

IPepul Scientific Calculators for College Students, IPepul Pink Desktop Math Solar Calculator with Notepad,991EX Type-C Rechargeable 552 Functions

Name: Scientific Calculators for College Students, IPepul Pink Desktop Math Solar Calculator with Notepad,991EX Type-C Rechargeable 552 Functions
Brand: IPepul
SKU: B0D2D9DL65
Price: 23.57 JPY
Availability: InStock
Rating: 3.4375 (1 reviews)

Rating

Model: 991EX

$23.57(incl. tax)Amazon price as of 2025-09-27

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Product Overview

The IPepul Scientific Calculator is designed for students and professionals. It features 552 calculation functions, solar and Type-C charging, and a notepad for simultaneous calculation and note-taking. The calculator supports trigonometric, exponential, logarithmic, calculus, statistical, and algebraic domains. It is suitable for students, engineers, nurses, and teachers.

IPepul Scientific Calculators for College Students, IPepul Pink Desktop Math Solar Calculator with Notepad,991EX Type-C Rechargeable 552 Functions の商品画像 1

Product Specifications

Display Digits

-digits

Display Type

Power Source

Battery Powered

Number of Functions

552

Memory

-locations

Fractions

Complex Numbers

Statistics Functions

Regression Analysis

Unit Conversions

Size & Weight

Weight

15.8 ounces

Hight

0.04 inches

Width

3.2 inches

Depth

6.5 inches

Features

Equation Solver Function

Feature Description

This function allows you to solve for unknown variables in equations directly on the calculator. Instead of manually manipulating equations, you can input the equation and find the solution, saving time and reducing errors, especially useful for complex algebraic problems.

About This Product

The product information does not mention an equation solver function. This function allows you to solve for unknown variables in equations directly on the calculator. It is useful for complex algebraic problems.

Matrix Calculation Function

Feature Description

This function enables you to perform operations on matrices, such as addition, subtraction, multiplication, and finding determinants and inverses. Useful for linear algebra calculations in subjects like engineering, physics, and computer graphics.

About This Product

The product information mentions that the calculator supports calculations involving matrices. This function enables you to perform operations on matrices, such as addition, subtraction, multiplication, and finding determinants and inverses.

Complex Number Calculation Function

Feature Description

This function allows calculations involving complex numbers, including addition, subtraction, multiplication, division, and finding magnitudes and arguments. Simplifies calculations in electrical engineering, quantum mechanics, and other fields involving imaginary numbers.

About This Product

The product information does not mention complex number calculations. This function allows calculations involving complex numbers, including addition, subtraction, multiplication, division, and finding magnitudes and arguments.

Base-N Calculation Function

Feature Description

This function allows you to perform calculations in different number systems, such as binary, octal, and hexadecimal, in addition to decimal. Useful for computer science and digital electronics, where these number systems are frequently used.

About This Product

The product information does not mention base-N calculation functions. This function allows you to perform calculations in different number systems, such as binary, octal, and hexadecimal, in addition to decimal.

Statistical Calculation Function

Feature Description

This function enables you to perform statistical analysis, including calculating mean, standard deviation, variance, regression, and distributions. Useful for statistics courses, data analysis, and research projects.

About This Product

The product information mentions that the calculator supports calculations in statistical domains. This function enables you to perform statistical analysis, including calculating mean, standard deviation, variance, regression, and distributions.

Unit Conversion Function

Feature Description

This function allows you to easily convert between different units of measurement, such as length, mass, volume, and temperature. Saves time and reduces errors when working with different units in physics, chemistry, or engineering problems.

About This Product

The product information does not mention a unit conversion function. This function allows you to easily convert between different units of measurement, such as length, mass, volume, and temperature.

SHOPSTAFF Rating Score

#51

Ranked #51 out of 56 products in Category

3.4

Overall Rating

This calculator offers a wide range of functions and a unique notepad feature. However, the brand's reliability is uncertain, and long-term durability is unknown. It's positioned as an affordable option for students.

Display Type and Readability

3.5

Rating Criteria Explanation

The display is the primary interface for a scientific calculator. Consider the type of display (LCD, LED), the number of lines it shows, and the size of the characters. A multi-line display allows you to see both the input expression and the result simultaneously, which is extremely useful for complex calculations. Good contrast and adjustable brightness are also crucial for readability in various lighting conditions. A clear and easy-to-read display minimizes errors and improves the overall user experience, especially during long calculation sessions.

Rating Comments

The product information lacks details about the display type and readability. Without this information, it's difficult to assess the user experience, but the screen size is 2.7 inches. Readability might be limited.

Functionality and Number of Built-in Functions

4.0

Rating Criteria Explanation

Scientific calculators come with a wide range of built-in functions, including trigonometric functions (sin, cos, tan), logarithmic functions (log, ln), exponential functions, statistical functions, and more. The number of functions and the ease of accessing them are important factors. Make sure the calculator includes the functions you need for your specific applications, whether it's for school, engineering, or scientific research. Look for calculators that offer quick access to commonly used functions through dedicated buttons or clear menu structures. Having enough functions prevents you from needing external resources during critical tasks.

Rating Comments

The calculator boasts 552 functions, covering a wide range of calculations. However, the ease of accessing these functions is unknown. The calculator supports trigonometric, exponential, logarithmic, calculus, statistical, and algebraic domains.

Calculation Accuracy and Precision

3.5

Rating Criteria Explanation

Accuracy is paramount for any scientific calculator. The calculator should perform calculations with minimal rounding errors and provide results with sufficient precision. Check the calculator's specifications for the number of digits it displays and its internal precision. While most calculators offer acceptable accuracy for everyday use, some models are designed for higher precision, which is essential for demanding scientific and engineering applications. Pay attention to reviews and tests that assess the calculator's accuracy in performing various calculations.

Rating Comments

The product information does not provide details about the calculation accuracy and precision. It is difficult to assess the reliability of the results. Accuracy is important for scientific and engineering applications.

Ease of Use and Ergonomics

3.0

Rating Criteria Explanation

A scientific calculator should be easy to use, with a well-organized keyboard layout and intuitive menu navigation. Consider the size and spacing of the keys, the tactile feedback they provide, and the overall comfort of holding and using the calculator. A good ergonomic design reduces fatigue and improves accuracy, especially during extended use. Look for calculators with a logical arrangement of functions and clear labeling of keys. Some calculators also offer features like replay functions to review and edit previous calculations easily. A user-friendly design significantly enhances productivity.

Rating Comments

The product information lacks details about the keyboard layout and menu navigation. It is difficult to assess the ease of use and ergonomics. The calculator has a multifunctional keyboard with scientific symbols and function keys.

Power Source and Battery Life

4.0

Rating Criteria Explanation

Scientific calculators typically use batteries (AAA, AA, or button cells) or solar power, or a combination of both. Consider the type of power source and the expected battery life. A calculator with long battery life is essential for users who frequently use it for extended periods. Solar-powered calculators are a good option for environments with ample light, as they reduce the need for battery replacements. Some calculators also have an auto-power-off feature to conserve battery life when not in use. Hybrid models that combine solar and battery power offer the best of both worlds.

Rating Comments

The calculator utilizes solar power and Type-C charging, ensuring it remains powered anytime, anywhere. This eliminates the need for button battery replacements. The battery life is not specified, but the dual power system is a plus.

Durability and Build Quality

3.0

Rating Criteria Explanation

A scientific calculator should be durable enough to withstand everyday use and occasional drops or bumps. Look for calculators made from sturdy materials with a solid construction. A protective cover or case can also help to prevent damage to the display and keys. Consider the environment in which the calculator will be used. If it will be frequently carried in a backpack or used in a harsh environment, a more rugged model is recommended. A durable calculator will last longer and provide a better return on investment.

Rating Comments

The product information does not provide details about the materials and construction. It is difficult to assess the durability and build quality. The calculator is designed to be lightweight and portable, making it easy to carry around.

Manufacturer Reliability and Warranty

2.5

Rating Criteria Explanation

Opting for a reputable manufacturer generally ensures higher product quality, reliability, and better customer support. Established brands often have a proven track record of producing accurate and durable scientific calculators. Additionally, a good warranty provides peace of mind in case of defects or malfunctions. Check the warranty terms and conditions, including the duration of coverage and the process for claiming warranty service. Reading online reviews and customer feedback can also provide valuable insights into the manufacturer's reliability and customer service quality. A reliable manufacturer and warranty support can save you from potential headaches and expenses in the long run.

Rating Comments

IPepul is an unknown brand, so the reliability and customer support are uncertain. There is no mention of a warranty. It is difficult to assess the long-term reliability of the product.

Cost Performance

4.0

Rating Criteria Explanation

Evaluate the calculator's features and performance relative to its price. A more expensive calculator may offer advanced features and higher accuracy, but it may not be necessary for all users. Determine your specific needs and budget, and then compare the cost-performance ratio of different models. Read reviews and compare specifications to find a calculator that offers the best value for your money. Consider the long-term cost, including the cost of replacing batteries or repairing the calculator. A calculator that provides the essential features you need at a reasonable price represents good cost performance.

Rating Comments

At $23.57, the calculator offers good value for its features, including the notepad and dual power system. However, the unknown brand and lack of information about accuracy and durability are drawbacks.

Brand & Manufacturer Details

IPepul

From the brandIPepul Brand StoryAccurately work through numbers with ease: Discover the remarkable IPepul calculator, a must - have for every user. Basic calculatorScientific CalculatorGraphing Calculator

Considerations

Brand reliability is uncertain
Durability is unknown
Writing on notepad may be faint

Recommended For

High school students
College students
Teachers
Engineers

Not Recommended For

Professionals requiring high reliability
Users needing advanced graphing capabilities
none in particular

Suitable For

Classroom
Homework
Exams
Office

Not Suitable For

Advanced engineering simulations
High-level statistical analysis
Complex financial modeling

Frequently Asked Questions (FAQ)

Q.Is this calculator suitable for college math classes?

A.According to staff confirmations, this calculator is worth using for college and is relatively easy to understand. It includes features useful for dividing fractions and converting them to decimals. It seems to have everything needed for basic college math classes.

Q.Is this calculator suitable for college math classes?

Q.Does the calculator require frequent battery replacements?

A.No, this calculator uses both solar power and Type-C charging, eliminating the need for frequent battery replacements.

Q.Does the calculator require frequent battery replacements?

A.No, this calculator uses both solar power and Type-C charging, eliminating the need for frequent battery replacements.

Q.Is the attached notepad easy to read?

A.One staff confirmation mentions that the writing on the notepad side is faint and difficult to read.

Q.Is the attached notepad easy to read?

A.One staff confirmation mentions that the writing on the notepad side is faint and difficult to read.

Q.Is this calculator suitable for high school students?

A.Yes, staff confirmations mention it's good for kids in high school and that it worked well for a high schooler.

Q.Is this calculator suitable for high school students?

A.Yes, staff confirmations mention it's good for kids in high school and that it worked well for a high schooler.

Q.Is the calculator easy to carry around?

A.The product description indicates that the calculator is lightweight and portable, making it easy to carry around.

Q.Is the calculator easy to carry around?

A.The product description indicates that the calculator is lightweight and portable, making it easy to carry around.

SHOPSTAFF Rating Ranking

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Power Source	Solar & Battery	Number of Functions	417
Memory	- locations	Fractions	Yes
Complex Numbers	Yes	Statistics Functions	Yes
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Display Digits	- digits	Display Type	High-Resolution 4-Tone
Power Source	Solar Powered	Number of Functions	540+
Memory	9 locations	Fractions	Yes
Complex Numbers	-	Statistics Functions	Yes
Regression Analysis	-	Unit Conversions	Yes

Equation Solver FunctionMatrix Calculation FunctionComplex Number Calculation FunctionBase-N Calculation FunctionStatistical Calculation FunctionUnit Conversion Function

4.6Overall Rating

4.5Display Type and Readability

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$16.99(incl. tax)Amazon price as of 2025-09-29

Casio fx-115ES Plus 2nd Edition: Advanced scientific calculator with Natural Textbook Display and 280+ functions.

Display Digits	16 digits	Display Type	LCD
Power Source	Solar Powered	Number of Functions	280
Memory	9 locations	Fractions	Yes
Complex Numbers	Yes	Statistics Functions	Yes
Regression Analysis	Yes	Unit Conversions	Yes

Equation Solver FunctionMatrix Calculation FunctionComplex Number Calculation FunctionBase-N Calculation FunctionStatistical Calculation FunctionUnit Conversion Function

4.6Overall Rating

4.5Display Type and Readability

4.7Functionality and Number of Built-in Functions

4.6Calculation Accuracy and Precision

4.4Ease of Use and Ergonomics

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4.3Durability and Build Quality

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Display Digits	- digits	Display Type	LCD
Power Source	Battery Powered	Number of Functions	-
Memory	- locations	Fractions	Yes
Complex Numbers	No	Statistics Functions	Yes
Regression Analysis	Yes	Unit Conversions	Yes

Equation Solver FunctionMatrix Calculation FunctionComplex Number Calculation FunctionBase-N Calculation FunctionStatistical Calculation FunctionUnit Conversion Function

4.5Overall Rating

4.5Display Type and Readability

4.3Functionality and Number of Built-in Functions

4.7Calculation Accuracy and Precision

4.4Ease of Use and Ergonomics

4.6Power Source and Battery Life

4.5Durability and Build Quality

4.8Manufacturer Reliability and Warranty

4.6Cost Performance

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Power Source	Solar & Battery	Number of Functions	-
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Regression Analysis	Yes	Unit Conversions	Yes

Equation Solver FunctionMatrix Calculation FunctionComplex Number Calculation FunctionBase-N Calculation FunctionStatistical Calculation FunctionUnit Conversion Function

4.5Overall Rating

4.5Display Type and Readability

4.0Functionality and Number of Built-in Functions

4.5Calculation Accuracy and Precision

4.3Ease of Use and Ergonomics

4.7Power Source and Battery Life

4.5Durability and Build Quality

4.8Manufacturer Reliability and Warranty

4.7Cost Performance

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IPepul Scientific Calculators for College Students, IPepul Pink Desktop Math Solar Calculator with Notepad,991EX Type-C Rechargeable 552 Functions

Product Overview

Product Images

Product Specifications

Size & Weight

Features

SHOPSTAFF Rating Score

Brand & Manufacturer Details

Considerations

Recommended For

Not Recommended For

Suitable For

Not Suitable For