Comparison

Transistors Handbook vs Math Expert Pro

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

Head to head
About

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.

Highlights
  • 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
Features
Read full description

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.

About

Math Expert Pro

This app provides a comprehensive collection of math and physics formulas. It features a unique calculator that determines possible calculations based on the information you input.

Highlights
  • Extensive math and physics formula library
  • Interactive formula calculator
  • Input-driven calculation suggestions
  • Supports iPhone, iPad, and iPod
  • Offline formula access
Features
Read full description

The application "math expert pro" is a collection of formulas out of mathematics and physics. The special feature is that the application can calculate the formulas. The calculation is based on the motto "Tell me what you know, and I will check which calculations are possible."

Screenshots

Transistors Handbook4 screens
Math Expert Pro4 screens

Verdict

The call

The clearest difference is review sentiment: Math Expert Pro at 67% against Transistors Handbook's 27%. Math Expert Pro also leads on price ($2.99 vs $3.99). Transistors Handbook's advantage is update cadence (fortnightly vs every 3 months). On ads, in-app purchases, monetization model 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

CostPrice · In-app purchases · Ads · Monetization

Transistors Handbook costs $3.99 and Math Expert Pro $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Transistors Handbook ships an update fortnightly, Math Expert Pro every 3 months. The most recent releases landed on October 6, 2026 and October 8, 2026 respectively.

Scorecard3 real differences · 7 level
Transistors Handbook versus Math Expert Pro: the parameters behind the verdict, then further details
ParameterTransistors HandbookMath Expert Pro
Price$3.99$2.99 — better
Rating4.0 (22 ratings) — better—
Positive reviews27.3% of reviews66.7% of reviews — better
Number of ratings22 — better—
Update frequencyFortnightly — betterEvery 3 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS11.4 — better12.0
Further details — not scored
Size22 MB10 MB
Age rating4+4+
DeveloperCentro Studi Informatica di Danilo PrioreMarkus Ide

Customer experience

Transistors Handbook

All ratings22 ratings
Positive68.2%
Neutral9.1%
Negative22.7%
Written reviews11 reviews
Positive27.3%
Neutral27.3%
Negative45.5%

Math Expert Pro

Written reviews6 reviews
Positive66.7%
Neutral0.0%
Negative33.3%

In-app purchases

None

Transistors Handbook

No in-app purchases

None

Math Expert Pro

No in-app purchases

Questions

Is Transistors Handbook free?
Transistors Handbook costs $3.99, with no in-app purchases.
Is Math Expert Pro free?
Math Expert Pro costs $2.99, with no in-app purchases.
Do Transistors Handbook or Math Expert Pro have ads?
Neither Transistors Handbook nor Math Expert Pro shows ads.
Which is updated more often, Transistors Handbook or Math Expert Pro?
Transistors Handbook ships an update fortnightly, and Math Expert Pro every 3 months. Most recently, Transistors Handbook was updated on October 6, 2026 and Math Expert Pro on October 8, 2026.

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