Comparison

DoD Systems Engineering vs Electrician Handbook

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

Head to head
About

DoD Systems Engineering

This app serves as a pocket reference for the Department of Defense Systems Engineering Technical Review process. It offers definitions for nearly 250 acronyms, details on Technology Readiness Levels, and in-depth information on review phases and technical processes.

Highlights
  • Acronym lookup (250+ definitions)
  • Technology Readiness Level definitions
  • Review information by phase
  • Phase details (Materiel Solutions Analysis to Operations & Support)
  • Technical and technical management processes
Features
Read full description

This app provides a handy pocket reference for engineers and logisticians involved in the very complex Department of Defense Systems Engineering Technical Review process. Features include: *Acronym lookup - nearly 250 acronyms defined! *Technology Readiness Level definitions *In-depth review information sorted by phases *In-depth phase information, from Materiel Solutions Analysis through Operations and Support *Comprehensive Information on technical and technical management processes All ThinChip Software apps are now available free of charge.

About

Electrician Handbook

This app provides electricians, students, and installers with essential electrical theory, interactive diagrams, and practical calculators. It includes a community forum for users to share knowledge and seek advice, all accessible offline without ads or subscriptions.

Highlights
  • Electrical theory topics
  • Interactive circuit diagrams
  • Calculators and formulas
  • Community forum
  • Offline access
  • No ads or subscriptions
Features
Read full description

Electrician’s Handbook — an app for electricians, students, and installers. Theory, diagrams, and calculators in one place. Works offline. No ads. No subscriptions. — Theory A variety of topics in electrical engineering: from basic concepts to grounding and lighting diagrams. Some topics include exercises with answers for self-check. — Diagrams Interactive electrical diagrams. You can interact with elements to better understand how they work. — Calculators A section with calculators, formulas, and useful reference tables. — Community A section where users can ask questions, share experience, and get advice from other members. — Contents of the "Theory" section: Basic concepts • Voltage, current, resistance, power • Ohm’s Law, Kirchhoff’s rules • Parallel and series connections • Short circuits, safety precautions • Electrical engineering terms Electromechanical converters • Transformer, generator, electric motor • Connecting a three-phase motor using a capacitor Protection and automation devices • Circuit breaker, RCD, RCBO • Voltage monitoring relay, contactor, fuses • Surge protection devices Cables and wires • Wire connection methods • Selecting cross-section by current and power • Color coding • Electrical panel Power stations and substations • Nuclear, thermal, solar, hydro, wind, and geothermal power stations Measuring instruments • Voltmeter, ammeter, ohmmeter, multimeter • Clamp meter • Electricity meter Grounding • Types of grounding systems • Equipotential bonding system Lighting • Incandescent, LED, and other types of lamps • Lamp holders, bases, lumens, lux • Color temperature • LED strip Work execution • Socket repair • Installation of flush-mounted and surface-mounted sockets • Switch installation Additional information • Power supply categories • Surge overvoltages • IP protection rating • Electrician’s tools • Types of outlets and plugs, voltages in different countries • Joule’s Law, Coulomb’s Law • Right-hand and left-hand rules — Contents of the "Diagrams" section: • Switch (1 and 2 gang) • Three-gang switch • Two-way switch • Two-way switch with intermediate switch • Outlets and switch in one block • Lighting with dimmer • Motion sensor lighting • Relay with light sensor • Lighting with impulse relay • Fluorescent lamp wiring • Socket wiring diagrams • Magnetic starter for motor • Star and delta motor connection — Contents of the "Calculators" section: • Basic formula calculator • Electricity cost calculator • SI unit system and metric prefixes • Diameter ↔ cross-section table • AWG to mm and mm to AWG conversion • Electronic component symbols

Screenshots

DoD Systems Engineering4 screens
Electrician Handbook4 screens

Verdict

The call

The clearest difference is rating: Electrician Handbook at 4.8 against DoD Systems Engineering's 3.8. Electrician Handbook also leads on update cadence (every 2 weeks vs every 5 months) and review sentiment (79% vs 50%). DoD Systems Engineering's advantage is in-app purchases (none vs 2). On price, ads, 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

Both are free to download. Electrician Handbook sells 2 one-off in-app purchases. DoD Systems Engineering asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Electrician Handbook holds the better App Store score, 4.8 against 3.8. That said, the two scores are not equally well evidenced: Electrician Handbook has 1K ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 50% of DoD Systems Engineering's written reviews are positive against 79% of Electrician Handbook's.

UpkeepUpdate frequency

DoD Systems Engineering ships an update every 5 months, Electrician Handbook every 2 weeks. The most recent releases landed on October 23, 2026 and October 25, 2026 respectively.

Scorecard6 real differences · 4 level
DoD Systems Engineering versus Electrician Handbook: the parameters behind the verdict, then further details
ParameterDoD Systems EngineeringElectrician Handbook
PriceFreeFree
Rating3.8 (4 ratings)4.8 (1K ratings) — better
Positive reviews50.0% of reviews78.6% of reviews — better
Number of ratings41K — better
Update frequencyEvery 5 monthsEvery 2 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFreeFree
DevicesiPhoneiPhone, iPad — better
Requires iOS26.016.0 — better
Further details — not scored
Size10 MB61 MB
Age rating4+4+
DeveloperRussell ShannonSergey Vavaev

Customer experience

DoD Systems Engineering

All ratings4 ratings
Positive75.0%
Neutral0.0%
Negative25.0%
Written reviews4 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

Electrician Handbook

All ratings986 ratings
Positive94.8%
Neutral2.4%
Negative2.7%
Written reviews103 reviews
Positive78.6%
Neutral7.8%
Negative13.6%

Bugs and requests

DoD Systems Engineering

Not enough reviews yet to summarise bugs or requests.

Electrician Handbook

Reported bugs

3 issues
  • App not launching on certain devices
  • Calculation errors in some modules
  • Inconsistent UI behavior across platforms

Requested features

4 requests
  • More practical examples and tutorials
  • Ability to save and export diagrams
  • Inclusion of industry standards and regulations
  • Integration of testing and simulation tools

In-app purchases

None

DoD Systems Engineering

No in-app purchases

2 purchases

Electrician Handbook

One-time2
  • Remove ads from application$2.99
  • Unlock all features in app$6.99

Questions

Is DoD Systems Engineering free?
DoD Systems Engineering is free to download, with no in-app purchases.
Is Electrician Handbook free?
Electrician Handbook is free to download, with in-app purchases available.
Which has better reviews, DoD Systems Engineering or Electrician Handbook?
Electrician Handbook is rated higher. DoD Systems Engineering averages 3.8 out of 5 from 4 ratings, while Electrician Handbook averages 4.8 from 1K ratings.
Do DoD Systems Engineering or Electrician Handbook have ads?
Neither DoD Systems Engineering nor Electrician Handbook shows ads.
Which is updated more often, DoD Systems Engineering or Electrician Handbook?
DoD Systems Engineering ships an update every 5 months, and Electrician Handbook every 2 weeks. Most recently, DoD Systems Engineering was updated on October 23, 2026 and Electrician Handbook on October 25, 2026.

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