Comparison

Opamp tools 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

Opamp tools

Read full description

This app is the collection of operational amplifier calculators. It is suitable for hobbyist or electronic engineer. Features * Inverting amplifier * Non-Inverting amplifier * Differential amplifier * Summing amplifier * Inverting comparator * First-order filter * Second-order filter (HPF) * Phase shift oscillator * Colpitts oscillator * Limit 5 combinations of component values * Share CSV via AirDrop * Upload CSV to iCloud Drive (For iOS8 or later) Pro Features * Instrumentation amplifier * Non-inverting comparator * Second-order filter (LPF) * Wien bridege oscillator * Hartley oscillator * No limitation of the number of suggestions * Selectable 1%,5%,10%,20% of values

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

Opamp tools4 screens
Digital Electronics Guide4 screens

Verdict

The call

The clearest difference is in-app purchases: Digital Electronics Guide at none against Opamp tools's 1. Digital Electronics Guide also leads on update cadence (every 5 weeks vs every 12 months). Opamp tools's advantage is ads (none vs shown) and iOS requirement (12.0 vs 16.0). 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. Opamp tools sells 1 one-off in-app purchase. Digital Electronics Guide asks for nothing beyond the download.

UpkeepUpdate frequency

Opamp tools ships an update every 12 months, Digital Electronics Guide every 5 weeks. The most recent releases landed on September 26, 2026 and August 27, 2026 respectively.

Scorecard4 real differences · 6 level
Opamp tools versus Digital Electronics Guide: the parameters behind the verdict, then further details
ParameterOpamp toolsDigital Electronics Guide
PriceFreeFree
Rating—5.0 (2 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—2 — better
Update frequencyEvery 12 monthsEvery 5 weeks — better
AdsNo — betterYes
In-app purchasesYesNo — better
Monetization—Ad-supported
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS12.0 — better16.0
Further details — not scored
Size4 MB24 MB
Age rating4+4+
DeveloperSiu Yuen HoALG Software Lab

In-app purchases

1 purchases

Opamp tools

One-time1
  • Unlock pro feature$1.99
None

Digital Electronics Guide

No in-app purchases

Questions

Is Opamp tools free?
Opamp tools 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.
Do Opamp tools or Digital Electronics Guide have ads?
Digital Electronics Guide shows ads; Opamp tools does not.
Which is updated more often, Opamp tools or Digital Electronics Guide?
Opamp tools ships an update every 12 months, and Digital Electronics Guide every 5 weeks. Most recently, Opamp tools was updated on September 26, 2026 and Digital Electronics Guide on August 27, 2026.

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