Comparison

PrepFE vs Digital Electronics Guide

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

Head to head
About

PrepFE

Prepare for your FE exam with practice problems and flashcards. Learn by doing with expert-curated content, track your progress, and identify areas for improvement. Study anytime, anywhere with this mobile resource.

Highlights
  • Practice FE exam questions
  • Interactive practice exams
  • Hundreds of practice questions
  • Detailed step-by-step explanations
  • Flashcards for key concepts
  • Progress tracking and weakness analysis
  • Updated content for new specifications
Features
Read full description

Don't spend time relearning topics from scratch and using poor resources. Jump right into practice problems and learn by doing! Supplement your learning with flash cards to learn the FE Reference Handbook and be familiar with your discipline's concepts. Take your exam practice on the go and learn with our curated content by engineering experts. Study whenever and wherever it’s convenient with PrepFE™. No need to carry around books and study guides. All you need is your phone and determination. Start your Professional Engineer journey and download the PrepFE - Electrical & Computer app. Install the free version today and jump start your studying! We have provided a limited free version of the app that you can try before deciding to upgrade. This version includes a limited set of practice questions, flash cards, and basic progress metrics. *Practice FE exam questions* *Interactive Practice Exams* *Hundreds of Practice Questions* *Detailed & Step-by-Step Explanations* *Reinforce learning with Flash Cards* *Breakdown of strengths and weaknesses* *Updated for 2020* We have up to date content for the new category specifications: • Mathematics • Probability and Statistics • Ethics and Professional Practice • Engineering Economics • Properties of Electrical Materials • Circuit Analysis (DC and AC Steady State) • Linear Systems • Signal Processing • Electronics • Power Systems • Electromagnetics • Control Systems • Communications • Computer Networks • Digital Systems • Computer Systems • Software Engineering

About

Digital Electronics Guide

This app serves as a comprehensive reference for digital electronics, covering essential theory and practical guides. It's designed for students, engineers, and hobbyists to learn and prototype digital circuits with ease. Features include detailed information on logic gates, IC families, and various digital components.

Highlights
  • Logic gate tutorials
  • IC reference data (TTL 7400, CMOS 4000)
  • Digital circuit design and prototyping
  • Covers counters, flip-flops, and more
  • Available in 14 languages
  • Detailed tutorials and references
Features
Read full description

Digital Electronics Guide is a powerful reference tool for electronics students, engineers, and hobbyists. Whether you're just starting out or already experienced, this app helps you design, learn, and prototype with ease. It combines essential theory with practical guides and covers key digital electronics topics, including logic gates, counters, flip-flops, and IC reference data. The app also features detailed information on popular digital IC families such as TTL 7400 and CMOS 4000 series. Perfect for quick learning or as a companion for working on electronic circuits and digital systems. Available in 14 Languages: • English, French, German, Indonesian, Italian, Japanese, Polish, Portuguese, Russian, Simplified Chinese, Spanish, Turkish, Ukrainian, and Vietnamese — study in your native language! The app includes detailed tutorials and references for: • Basic logic • Families of digital chips • Universal logic elements • Elements with Schmitt trigger • Buffer elements • Flip-flops • Registers • Counters • Adders • Multiplexers • Decoders and demultiplexers • 7-segment LED drivers • Encryptors • Digital comparators • Astable CMOS Oscillators • Monostable CMOS Oscillators • Bistable CMOS Oscillators • Gated CMOS Oscillators • TTL Oscillators • 7400 series ICs • 4000 series ICs Whether you're learning, teaching, or building real-world digital circuits, Digital Electronics Pro is your trusted companion every step of the way.

Screenshots

PrepFE4 screens
Digital Electronics Guide4 screens

Verdict

The call

The clearest difference is review sentiment: Digital Electronics Guide at 100% against PrepFE's 0%. Digital Electronics Guide also leads on rating (5.0 vs 2.6) and in-app purchases (none vs 6). PrepFE's advantage is ads (none vs shown) and ratings volume (8 vs 2). On price 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

Both are free to download. PrepFE sells 6 one-off in-app purchases. Digital Electronics Guide asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Digital Electronics Guide holds the better App Store score, 5.0 against 2.6. Both are backed by a comparable volume of ratings — 8 and 2 respectively. Written reviews point the same way: 0% of PrepFE's written reviews are positive against 100% of Digital Electronics Guide's.

UpkeepUpdate frequency

PrepFE ships an update every 36 months, Digital Electronics Guide every 5 weeks. The most recent releases landed on September 30, 2026 and October 1, 2026 respectively.

Scorecard8 real differences · 2 level
PrepFE versus Digital Electronics Guide: the parameters behind the verdict, then further details
ParameterPrepFEDigital Electronics Guide
PriceFreeFree
Rating2.6 (8 ratings)5.0 (2 ratings) — better
Positive reviews0.0% of reviews100.0% of reviews — better
Number of ratings8 — better2
Update frequencyEvery 36 monthsEvery 5 weeks — better
AdsNo — betterYes
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesAd-supported — better
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS13.0 — better16.0
Further details — not scored
Size288 MB24 MB
Age rating4+4+
DeveloperPrepFE, Inc.ALG Software Lab

Customer experience

PrepFE

All ratings8 ratings
Positive37.5%
Neutral0.0%
Negative62.5%
Written reviews3 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Digital Electronics Guide

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

6 purchases

PrepFE

One-time6
  • 1 Month Access Renewal$47.99
  • 1 Month Access$59.99
  • 3 Months Access Renewal$61.99
Show 3 more
  • 6 Months Access Renewal$75.99
  • 3 Months Access$79.99
  • 6 Months Access$99.99
None

Digital Electronics Guide

No in-app purchases

Questions

Is PrepFE free?
PrepFE is free to download, with in-app purchases available.
Is Digital Electronics Guide free?
Digital Electronics Guide is free to download, with no in-app purchases.
Which has better reviews, PrepFE or Digital Electronics Guide?
Digital Electronics Guide is rated higher. PrepFE averages 2.6 out of 5 from 8 ratings, while Digital Electronics Guide averages 5.0 from 2 ratings.
Do PrepFE or Digital Electronics Guide have ads?
Digital Electronics Guide shows ads; PrepFE does not.
Which is updated more often, PrepFE or Digital Electronics Guide?
PrepFE ships an update every 36 months, and Digital Electronics Guide every 5 weeks. Most recently, PrepFE was updated on September 30, 2026 and Digital Electronics Guide on October 1, 2026.

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