Comparison

Opamp tools vs Circuit

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

Circuit

Design, analyze, and solve electrical circuits with this comprehensive tool. It supports various circuit types, simplifies complex networks step-by-step, and includes educational resources on electrical laws and formulas. Save and share your designs locally.

Highlights
  • Design and analyze electrical circuits
  • Simplify complex resistor, capacitor, and inductor networks
  • Convert delta to wye and vice versa
  • Convert current to voltage sources and vice versa
  • Design or find resistor values
  • Step-by-step simplification visualization
  • Educational study tab with electrical laws and formulas
Features
Read full description

The CircuitDesign is a feature rich app designed by an engineer. This app allows the creative smart people like you to design, draw, analyse, simplify and solve electrical circuits. You can design, draw, solve and simplify resistor-network, solve capacitor-network, solve inductor-circuit. You can design, draw, solve and simplify parallell circuit diagrams, series circuit diagrams, delta/wye circuit diagrams and any combinations of these. You can convert delta to wye and wye - delta network You can convert current source to voltage source or voltage source to current source You can design your own resistor (3,4,5 or 6 band resistor) or find the value for existing resistor You can even share your creativity with other people. Save the diagram locally. Do you have a complex network involving any combinations of parallell network, series network, delta/wye network? Fantastic. You can simplify this network and see how its done step by step so you can learn how to simplify networks. You can go back all the way to original network to see how the simplification was done. Simply stated, view simplification steps graphically. Keeps the historical diagram so that you can go back and verify each step. You can also share the simplification steps or save it locally. It automatically saves your hard work locally on your device so you can come back and pick up from where you left off as your great effort of drawing diagrams and simplifying/solving it will not be lost. Are you a high school student learning electricity? This is the app for you. Are you a university student learning electrical engineering? This is the app for you. There is also a page to help you study. This study tab teaches you some very important laws of electricity and important formula. Like Ohm, law, Kirchhoff's volgate law, Kirchhoff's current law, There is also a page to help you learn now to use this app. This is a perfect app for a creative smart individual like you. This is an app for all student groups. From high school to college to university students. Be creative. Enjoy the app!

Screenshots

Opamp tools4 screens
Circuit4 screens

Verdict

The call

The clearest difference is in-app purchases: Circuit at none against Opamp tools's 1. Circuit 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 15.1). 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. Circuit asks for nothing beyond the download.

UpkeepUpdate frequency

Opamp tools ships an update every 12 months, Circuit every 5 weeks. The most recent releases landed on September 26, 2026 and June 5, 2026 respectively.

Scorecard4 real differences · 6 level
Opamp tools versus Circuit: the parameters behind the verdict, then further details
ParameterOpamp toolsCircuit
PriceFreeFree
Rating—1.0 (2 ratings) — better
Positive reviews—0.0% 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, iPodiPhone, iPad, iPod
Requires iOS12.0 — better15.1
Further details — not scored
Size4 MB35 MB
Age rating4+4+
DeveloperSiu Yuen HoOm Prakash Chapagain

In-app purchases

1 purchases

Opamp tools

One-time1
  • Unlock pro feature$1.99
None

Circuit

No in-app purchases

Questions

Is Opamp tools free?
Opamp tools is free to download, with in-app purchases available.
Is Circuit free?
Circuit is free to download, with no in-app purchases.
Do Opamp tools or Circuit have ads?
Circuit shows ads; Opamp tools does not.
Which is updated more often, Opamp tools or Circuit?
Opamp tools ships an update every 12 months, and Circuit every 5 weeks. Most recently, Opamp tools was updated on September 26, 2026 and Circuit on June 5, 2026.

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