Comparison

回路計算機 vs Electronics Tools & Calc Pro

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

Head to head
About

回路計算機

Features
Read full description

「回路計算機」はオームの法則、合成抵抗・容量、合成インピーダンスなどの計算を行う計算機です。普通の電卓としての機能はありません。簡単にオームの法則や合成抵抗などを計算することができます。わざわざ公式に値を入れながら計算するのが面倒、なんてときに便利な計算機です。アプリ内では可能な限り、公式も載せています。 <使い方>  計算したい種類を選択し数値を入力すると各種計算結果が表示されます。例えば、オームの法則で抵抗値を求めたい場合、「オームの法則」を選択します。続いて、その中にある「抵抗(電圧と電流から計算)」を選択、すると、値の入力画面になります。電圧と電流を入力し計算ボタンを押してください。画面下の出力部分に抵抗値が表示されます。 <注意事項> ・本アプリでの計算ミスなどによる問題は責任を負うことは出来ません ・単位は計算する対象により変わるため記載していません。対象により、単位変換を行ってください ・ありえない条件でも公式に当てはめ計算できる場合、計算します ・角度はすべて度です(現在、ラジアンには対応していません) ・有効桁数は15桁です ・テストはしていますが、もし不具合がありましたら、不具合送信をお願いします ・好評であれば、要望の多い機能を追加します 計算できる種類は以下の通りです。 <オームの法則> ・抵抗を求める(電圧と電流から計算) ・電圧を求める(電流と抵抗から計算) ・電流を求める(電圧と抵抗から計算) <抵抗> ・合成抵抗(直列) ・合成抵抗(並列) ・合成抵抗(3つの抵抗を直列) ・合成抵抗(3つの抵抗を並列) ・分圧(入出力電圧から抵抗の比率を計算)  注:抵抗値は使用用途により変わるので、計算しません ・分圧(入出力電圧と電源側抵抗値から計算) ・分圧(入出力電圧と接地側抵抗値から計算) <抵抗の消費電力> ・電圧と抵抗から計算 ・電流と抵抗から計算 ・電圧と電流から計算 ・電圧と抵抗から計算(抵抗2つを直列) ・電圧と抵抗から計算(抵抗2つを並列) <コンデンサ> ・合成容量(直列) ・合成容量(並列) ・合成容量(3つのコンデンサを直列) ・合成容量(3つのコンデンサを並列) ・合成容量(直列と並列の複合) ・蓄えられるエネルギー <コイル> ・合成インダクタンス(直列) ・合成インダクタンス(並列) ・蓄えられるエネルギー <合成インピーダンス:2種類> ・RL:抵抗とコイル(直列) ・RL:抵抗とコイル(並列) ・LC:コイルとコンデンサ(直列) ・LC:コイルとコンデンサ(並列) ・RC:抵抗とコンデンサ(直列) ・RC:抵抗とコンデンサ(並列) <合成インピーダンス:3種類> ・RCL:抵抗とコンデンサとコイル(直列) ・RCL:抵抗とコンデンサとコイル(並列)

About

Electronics Tools & Calc Pro

This app serves as a pocket electronics lab, offering a comprehensive reference for components and circuits. It simplifies complex calculations for filters, inductors, and various circuit configurations, aiding engineers and hobbyists in their designs.

Highlights
  • Electronic component reference
  • Electronic circuit reference
  • Filter calculation tools
  • Inductor winding calculators
  • Resistor and capacitor calculations
  • Ohm's Law calculator
  • AC/DC power calculations
Features
Read full description

Calculate, simulate, and understand electronic circuits with more than 60 calculators, interactive tools, and illustrated engineering references. Electronics Tools & Calculator is an all-in-one toolkit for students, engineers, technicians, makers, and electronics enthusiasts. Use it to study circuit theory, select components, check designs, or troubleshoot projects with practical calculators and clear circuit visuals. MORE THAN 60 ELECTRONICS CALCULATORS Solve problems across a wide range of topics: • Ohm’s law, voltage, current, resistance, and power • Series and parallel resistors and capacitors • Four-band, five-band, and SMD resistor codes • Voltage and current dividers • DC power and ripple voltage • RC, RL, LC, and RLC circuits • LED resistor and parallel LED calculations • Capacitor and inductor charging • Star-to-delta and delta-to-star conversions ACTIVE AND PASSIVE FILTER DESIGN Design and explore: • RC, RL, and LC filters • Butterworth and Chebyshev filters • Active and passive filters • Sallen-Key active filters • Band-pass and band-reject filters • Twin-T notch filters Selected advanced calculators include response graphs, helping you visualize how component values affect circuit behavior. AMPLIFIERS AND SEMICONDUCTORS Work with practical tools for: • 555 timer astable and monostable circuits • BJT analysis, biasing, Q-point, and switching • MOSFET switching • Inverting, non-inverting, and difference amplifiers • Class A, Class B, and Class AB amplifiers • Differential amplifiers and current mirrors • LM386 audio amplifier circuits POWER, RF, AND DESIGN TOOLS Explore calculations for: • Linear regulators and heat dissipation • Buck and boost converters • Rectifiers and Zener regulators • Clippers, clampers, and voltage multipliers • PCB trace width • Air-core and multilayer inductors • Transformers • Coaxial cables and waveguides • Antenna length and skin depth • dBm, watts, and decibel conversions • Servo and stepper motors DIGITAL ELECTRONICS Study essential digital circuits with clear diagrams and truth tables: • Logic gates • Flip-flops and counters • Multiplexers and demultiplexers • Encoders and decoders • Shift registers • Common digital integrated circuits INTERACTIVE CIRCUIT TOOLS Explore circuit behavior through interactive simulations and strong visual explanations. Adjust values, examine circuit configurations, and connect formulas with practical electronic designs. ILLUSTRATED ELECTRONICS REFERENCES Access more than 30 guides covering resistors, capacitors, inductors, transformers, diodes, BJTs, MOSFETs, IGBTs, UJTs, SCRs, DIACs, TRIACs, operational amplifiers, regulators, 555 timers, sensors, digital logic, Arduino boards, and ATmega microcontrollers. The guides combine explanations, equations, circuit diagrams, pinouts, truth tables, and practical notes to connect theory with real-world applications. DESIGNED FOR FASTER WORK • Search calculators by name • Save frequently used tools to Favorites • View response graphs in selected calculators • Export results from selected tools as PDF documents • Automatically switch between light and dark appearance • Use an interface designed for phones and larger screens • Choose from 15 supported languages • Access additional features through optional Pro tools Whether you are learning electronics, designing a filter, analyzing an amplifier, or checking values at the workbench, Electronics Tools & Calculator keeps useful tools and references close at hand. Important: This app is intended for education and design assistance. Always verify calculations, component ratings, circuit requirements, and safety considerations before building or operating electronic equipment.

Screenshots

回路計算機4 screens
Electronics Tools & Calc Pro4 screens

Verdict

The call

The clearest difference is price: 回路計算機 at $1.99 against Electronics Tools & Calc Pro's $5.99. 回路計算機 also leads on iOS requirement (13.0 vs 15.0). Electronics Tools & Calc Pro's advantage is review sentiment (67% vs 50%) and update cadence (every 5 months vs every 15 months). On ads, in-app purchases 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

回路計算機 costs $1.99 and Electronics Tools & Calc Pro $5.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

回路計算機 ships an update every 15 months, Electronics Tools & Calc Pro every 5 months. The most recent releases landed on November 2, 2026 and November 7, 2026 respectively.

Scorecard4 real differences · 6 level
回路計算機 versus Electronics Tools & Calc Pro: the parameters behind the verdict, then further details
Parameter回路計算機Electronics Tools & Calc Pro
Price$1.99 — better$5.99
Rating—5.0 (5 ratings) — better
Positive reviews50.0% of reviews66.7% of reviews — better
Number of ratings—5 — better
Update frequencyEvery 15 monthsEvery 5 months — better
AdsNoNo
In-app purchasesNoNo
Monetization—Paid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.0 — better15.0
Further details — not scored
Size15 MB58 MB
Age rating4+4+
DeveloperYoshiaki OnishiAnas Abubakar

Customer experience

回路計算機

Written reviews2 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

Electronics Tools & Calc Pro

All ratings5 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews3 reviews
Positive66.7%
Neutral0.0%
Negative33.3%

In-app purchases

None

回路計算機

No in-app purchases

None

Electronics Tools & Calc Pro

No in-app purchases

Questions

Is 回路計算機 free?
回路計算機 costs $1.99, with no in-app purchases.
Is Electronics Tools & Calc Pro free?
Electronics Tools & Calc Pro costs $5.99, with no in-app purchases.
Do 回路計算機 or Electronics Tools & Calc Pro have ads?
Neither 回路計算機 nor Electronics Tools & Calc Pro shows ads.
Which is updated more often, 回路計算機 or Electronics Tools & Calc Pro?
回路計算機 ships an update every 15 months, and Electronics Tools & Calc Pro every 5 months. Most recently, 回路計算機 was updated on November 2, 2026 and Electronics Tools & Calc Pro on November 7, 2026.

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