Transistors Handbook vs Math Solver Pro
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Transistors Handbook
This app serves as a comprehensive guide to transistors, offering detailed information on over 51,000 types. Users can search for transistors by name or power, view graphical schemas, and access datasheets. It's designed to assist in selecting and designing electronic circuits.
- Database of over 51,000 transistors
- Detailed transistor specifications
- Graphical schema and code information
- Search by name or power
- Online datasheet access
- Information on Silicon and Germanium transistors
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Transistors Handbook - Your Transistor Guide. This app will guide you to know, choose, select and design your next board masterpiece using that transistor you weren’t remembering. With this app you can update the transistor informations and share it with other app users. What is a transistor? (from Wikipedia): “A transistor is a semiconductor device used to amplify and switch electronic signals and power. It is composed of a semiconductor material with at least three terminals for connection to an external circuit. A voltage or current applied to one pair of the transistor's terminals changes the current flowing through another pair of terminals. Because the controlled (output) power can be much more than the controlling (input) power, a transistor can amplify a signal. Today, some transistors are packaged individually, but many more are found embedded in integrated circuits.” The transistor is the fundamental building block of modern electronic devices, and is ubiquitous in modern electronic systems. Following its release in the early 1950s the transistor revolutionized the field of electronics, and paved the way for smaller and cheaper radios, calculators, and computers, among other things.” With Transistors Handbook you will se the design, the kind and all the aspects of more than 51.000 transistors, the application will provide the following info: - Kind - Graphical Schema - Code - Type - Material - Power - VCB - VCE - VEB - LC - FT - HFE - Note of the Transistor - Similar - Online Datasheet You can also use the embedded search engine to search a transistor for its name or power. The coverage of the transistors is about the complete catalogue of the Silicon and Germanium. The series included are:, PNP and NPN, series 10 ~ 12, 14 ~ 19, 25 ~ 28, 2A ~ 2D, 2G, 2H, 2N, 2P, 2S, 2T, 30, 35, 37, 38, 3N, 3O, 3S, 3T, 40 ~ 43, 45, 4N, 50, 52, 55, 56, 5N, 60, 63, 6N, 71 ~ 74, 7N, 80, 81, 85, 90, 92, 94, A1, A5, A7, A8, AC, AD, AF, AJ ~ AM, AP, AR ~ AW, BC ~ BF, BJ, BL, BN, BP, BR ~ BV, C0 ~ C9, CA ~ CE, CG ~ CN, CP ~ CV, CX, D1 ~ D8, DA ~ DD, DH, DJ, DK, DM, DN, DP ~ DT, DW, DX, DZ, E1 ~ E3, E5 ~ E7, EA, EC, ED, EF, EJ, EL ~ EN, EQ ~ ET, EW, F1 ~ F5, FA ~ FH, FJ, FK, FM ~ FQ, FS, FT, FV, FX, FZ, G2, G6, GA ~ GF, GI, GM, GP, GS, GT, HA ~ HF, HK, HL, HN, HP, HS, HT, HV, HX, ID, IM, IN, IR, IT, J2, J4, J6, JA, JC, JE, JF, JO, K2, K4, K9, KD ~ KG, KM ~ KP, KR ~ KU, L4, L5, LB, LD, LI, LJ, LL ~ LP, LT, LX, M1, M2, MA ~ MH, MJ, MM ~ MU, MX, MZ, NA ~ NC, NJ, NK, NM, NP, NR ~ NT, NX, NZ, OC, OD, P2 ~ P4, P6, P7, P9, PB ~ PE, PH ~ PO, PR ~ PU, PX, PZ, Q, Q5, R3, R5, R7 ~ R9, RC, RE, RJ, RS, RT, RV, S0 ~ S2, S4 ~ S9, SA, SC ~ SH, SK, SM, SN, SP, SQ, SS, ST, SV, SX, SY, T0 ~ T3, TA, TB, TD ~ TF, TI, TK ~ TN, TP, TR, TS, TV, U2, UC, UM, UN, UP, V1, V2, V4, V7, W2, WT, XA ~ XC, XP, XQ, XS, ZB, ZD, ZG, ZH, ZT, ZU, ZX, with volts, frequencies, power, HFE (gain), similar transistors and pin design. The list may not be exhaustive, if you find any transistor missing, let us know. *** Don't forget to check also our Mosfet Handbook application. The perfect companion of Transistors Handbook.
Math Solver Pro
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Math Solver Pro is a comprehensive tool designed for students, engineers, and anyone who works with math in their studies or profession. The app includes 100+ calculators and guides covering a wide range of mathematical topics. Each calculator includes a brief theoretical explanation and performs step-by-step calculations using the correct formulas — making it ideal for learning, checking homework, or quick reference on the go. Covered Topics: • Matrix operations • Determinants • Vector calculus • 2D and 3D analytic (Cartesian) geometry • 2D and 3D elementary geometry • Systems of linear equations • Algebra • Quadratic equations and more Key Features: • Over 100 calculators across major math fields • Step-by-step solutions with detailed explanations • Quick theory references for each task • Random number generator for creating practice problems • Multilingual support: English, French, German, Italian, Portuguese, Russian, Spanish, Ukrainian Whether you're preparing for exams or solving real-world engineering tasks, Math Task Solver makes it fast and easy. The application performs the following operations: • Matrix addition • Matrix subtraction • Matrix multiplication • Matrix multiplication by scalar • Matrix transpose • Matrix square • Determinant: Sarrus method • Determinant: Laplace method • Invertible matrix • Vector Length • Vector coordinates by two points • Vectors addition • Vectors subtraction • Scalar and vector multiplication • Scalar product of vectors • Cross product of vectors • Mixed triple product • Angle between two vectors • Projection of a vector onto another vector • Direction cosines • Collinear vectors • Orthogonal vectors • Coplanar vectors • Area of triangle formed by vectors • Area of a parallelogram formed by vectors • Volume of pyramid formed by vectors • Volume of a parallelepiped formed by vecto • General equation of a straight line • Slope equation of a straight line • Line equation in segments • Polar parameters of the line • Relationship between line and point • Distance between two points • Dividing a segment in half • Dividing a segment in a given ratio • Triangle area • Condition under which three points lie on the same line • Condition of parallel lines • Two lines are perpendicular • Angle between two lines • Bunch of lines • Relationship between a line and a pair of points • Point to line distance • Equation of a plane • Condition for parallel planes • Condition for perpendicular planes • Angle between two planes • Segments on axes • Equation of a plane in segments • Relationship between a plane and a pair of points • Point to plane distance • Polar parameters of the plane • Normal Equation of a Plane • Reducing the plane equation to normal form • Equations of a line in space • Canonical equation of a straight line • Parametric equations of a straight line • Direction vectors • Angles between line and coordinate axes • Angle between two lines • Angle between line and plane • Condition of parallel line and plane • Condition of perpendicularity of a line and a plane • Triangle area • Median of triangle • Triangle height • Pythagorean theorem • Radius of a circle circumscribing a triangle • Radius of a circle inscribed in a triangle • Area of a parallelogram • Area of a rectangle • Square area • Trapezoid area • Rhombus area • Circle area • Sector area • Length of the arc of a circle • Parallelepiped volume • Cuboid volume • Cube volume • Pyramid surface area • Pyramid volume • Truncated pyramid volume • Cylinder lateral surface area • Cylinder total area • Cylinder volume • Cone lateral surface area • Cone total surface area • Cone volume • Sphere surface area • Sphere volume • Substitution method • Cramer's method • Invertible matrix method • Quadratic Equations • Biquadratic Equations • Arithmetic progression • Geometric progression • Greatest Common Divisor • Least Common Multiple The application is being actively developed and supplemented with new calculators. Keep for updates!
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Verdict
The clearest difference is update cadence: Transistors Handbook at fortnightly against Math Solver Pro's every 2 months. Transistors Handbook also leads on price ($3.99 vs $4.99) and iOS requirement (11.4 vs 16.0). On ads, in-app purchases and device support 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
Transistors Handbook costs $3.99 and Math Solver Pro $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Transistors Handbook ships an update fortnightly, Math Solver Pro every 2 months. The most recent releases landed on October 6, 2026 and October 12, 2026 respectively.
| Parameter | Transistors Handbook | Math Solver Pro |
|---|---|---|
| Price | $3.99 — better | $4.99 |
| Rating | 4.0 (22 ratings) — better | — |
| Positive reviews | 27.3% of reviews | — |
| Number of ratings | 22 — better | — |
| Update frequency | Fortnightly — better | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 11.4 — better | 16.0 |
| Further details — not scored | ||
| Size | 22 MB | 11 MB |
| Age rating | 4+ | 4+ |
| Developer | Centro Studi Informatica di Danilo Priore | ALG Software Lab |
In-app purchases
Transistors Handbook
No in-app purchases
Math Solver Pro
No in-app purchases
Questions
Is Transistors Handbook free?
Is Math Solver Pro free?
Do Transistors Handbook or Math Solver Pro have ads?
Which is updated more often, Transistors Handbook or Math Solver Pro?
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