Comparison

Embedded Interview Q&A Prep vs Learning transistor

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

Head to head
About

Embedded Interview Q&A Prep

Features
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Prepare smarter. Interview better. Get hired as an Embedded Engineer. This app is a complete Embedded Systems Interview Preparation Kit, designed for students, freshers, and working professionals targeting roles in Embedded Engineering, Firmware Development, and IoT. Whether you're preparing for your first embedded job or switching to a better role, this app gives you curated interview questions, clear explanations, and mock interview practice โ€” all in one place. What youโ€™ll learn โ€ข Embedded C Programming โ€ข Pointers, Memory, Bit Manipulation โ€ข Microcontrollers (MCU) Fundamentals โ€ข Registers, GPIO, Timers, ADC โ€ข Interrupt Handling & ISR Design โ€ข RTOS Concepts (Tasks, Scheduling, Semaphores) โ€ข Communication Protocols (UART, SPI, I2C, CAN) โ€ข Memory Systems (Stack, Heap, Flash, EEPROM) โ€ข Debugging Tools (JTAG, SWD, GDB) โ€ข Embedded Linux Basics (for advanced roles) Key Features - 300+ carefully selected interview Q&A - Topic-wise structured learning - Clear and concise explanations - Beginner to advanced coverage - AI-based mock interview practice (optional feature if enabled) - Offline access to questions - Clean and distraction-free UI Who is this app for? - Embedded Engineer aspirants - Electronics & ECE students - Firmware developers - IoT professionals - Interview preparation candidates Why this app? Most interview failures happen due to lack of structured preparation. This app gives you exactly what interviewers ask, organized in the right learning path โ€” from fundamentals to advanced concepts. Practice daily. Build confidence. Crack embedded interviews. Upcoming additions โ€ข ARM architecture topics โ€ข Advanced Embedded Linux โ€ข IoT protocols (BLE, MQTT, LoRa) โ€ข Safety standards (MISRA C, ISO26262) Start preparing today and take your Embedded Engineering career to the next level. Privacy Policy: https://rajendrac3.github.io/Embedded-legal/ Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula

About

Learning transistor

Features
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How does a computer actually compute? Not metaphorically โ€” physically. Learning Transistor answers that question in 14 interactive screens, starting from a single transistor and ending at a working one-bit computer you can step through with your finger. Every screen is a live circuit. Current flows as moving dots, voltage glows on the wires, and every input is yours to flip. Nothing is a video, and nothing is a quiz โ€” you learn by turning things on and off and watching what the electrons do. THE JOURNEY - Meet Transistor Man โ€” the classic mental model of how a transistor keeps its collector current exactly 100 times the base current, and what happens when it can't - The transistor switch: how 9.4 mA of base current lights a 100 mA lamp - The NOT gate: how a resistor and a transistor turn voltage into logic โ€” and why "1" costs no current at all - NAND and NOR at the transistor level: series vs parallel, and why these two gates can build everything else - The symbol language: the D-shape, the pointed shape, and the little circle that flips every answer - Building with gates: AND from NANDs โ€” abstraction you can tap to open and see the transistors still working inside - The SR latch: two crossed gates that remember one bit after your finger leaves the screen - XOR and the half adder: the moment logic becomes arithmetic, and 1 + 1 becomes 10 - The finale: memory + adder + feedback + a STEP clock โ€” a one-bit computer, with every layer tappable all the way down to the silicon FREE TO START The first two screens โ€” Transistor Man and the transistor switch โ€” are free. A single purchase unlocks the rest of the journey. No subscriptions, no ads, no accounts, no data collection. Inspired by the classic figures of The Art of Electronics. Made for curious minds who want to know what is really happening inside the machine they are holding.

Screenshots

Embedded Interview Q&A Prep4 screens
Learning transistor3 screens

Verdict

The call

The clearest difference is iOS requirement: Learning transistor at 17.0 against Embedded Interview Q&A Prep's 26.2. On price, ads, in-app purchases and device support there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Embedded Interview Q&A Prep sells 3 in-app purchases, starting at $2.99 per month and Learning transistor sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Scorecard1 real difference ยท 4 level
Embedded Interview Q&A Prep versus Learning transistor: the parameters behind the verdict, then further details
ParameterEmbedded Interview Q&A PrepLearning transistor
PriceFreeFree
AdsNoNo
In-app purchasesYesYes
DevicesiPhone, iPad โ€” betteriPhone
Requires iOS26.217.0 โ€” better
Further details โ€” not scored
Size23 MB1 MB
Age rating4+4+
DeveloperRajendra ChoudharySungjun Kim

In-app purchases

3 purchases

Embedded Interview Q&A Prep

Subscriptions3
  • Embedded Premium Monthly$2.991 Month
  • Embedded Premium Quarterly$4.993 Months
  • Embedded Premium Yearly$14.991 Year
1 purchases

Learning transistor

One-time1
  • Full Access$4.99

Questions

Is Embedded Interview Q&A Prep free?
Embedded Interview Q&A Prep is free to download, with in-app purchases available.
Is Learning transistor free?
Learning transistor is free to download, with in-app purchases available.
Do Embedded Interview Q&A Prep or Learning transistor have ads?
Neither Embedded Interview Q&A Prep nor Learning transistor shows ads.

Other comparisons