LoCAD vs Logic
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
LoCAD
Design and simulate digital logic circuits with an emphasis on simple creation and graphical visualization. Easily wire elements, observe current flow, and understand state changes to improve comprehension and fault detection. Create custom integrated circuits for complex, organized designs.
- Digital circuit design
- Logic simulation
- Graphical visualization
- Simple element wiring
- Custom IC creation
- State change observation
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LoCAD is a software for designing and simulating digital circuits. Special emphasis is given to simple creation and graphical visualization of a circuit's functioning. The inputs and outputs of the elements can be wired quite simply. Usually, two touches are sufficient. The system searches a convenient way by itself. In the simulation, you can watch the current flow and thus follow the cycle of state changes. This way, your understanding of a circuit's functioning is enhanced, and your perception of circuit faults is improved. It is possible to produce your own elements (ICs) with discretionary levels of nesting. Like this, you can build big and complex circuits in a clearly arranged way. During the simulation, you can watch the state changes in all ICs. A detailed introduction facilitates your familiarisation with the software.
Logic
Design, analyze, and simplify logic gate networks. Generate truth tables, find minimized boolean expressions, and optimize circuits. Supports forward and reverse engineering with beautiful, shareable diagrams. Includes a study tab for boolean algebra.
- Design logic gate networks
- Analyze and simplify boolean expressions
- Generate truth tables
- Simulate logic circuits
- Forward and reverse engineering
- Generate waveform diagrams
- Boolean algebra study tab
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The LogicGateDesign is a feature rich app designed by an engineer. This app allows the creative smart people like you to design, draw, analyse and simplify logic gate networks. You can draw logic gate networks and share it with others. You can generate truth table and find simplified/minimized boolean expression that represents the network. You can optimize and reverse engineer a boolean expression to draw a ladder logic diagram. It performs both forward engineering (boolean expression to logic circuit) and reverse engineering (logic circuit to boolean expression). There can be multiple groups of network and each group can have multiple outputs. Truth table is generated for all the outputs. You can simplify a boolean expression, and find the truth table and share it. Show truth table along with different types of boolean expression (simplified, Sum-of-products, Product-of-sums) The simplified expressions also gives you the number of gates required. You also get the alternate expressions for the same output with the gates required for that. You can generate a truth table, simplified boolean expression using input-output waveforms. You can generate a output waveforms, simplified boolean expression using truth table and input waveforms. You can generate a grey codes and grey code encoder wheel and share it. Do you have a truth table for your network and want to find the simplified/minimized boolean expression? This app has you covered. You can simulate your network by changing one input at a time or toggeling all inputs at once. This app generates beautiful diagrams (logic gate diagram or waveform diagram) that you can share with others 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 will not be lost. There is also a page to help you study. This study tab teaches you some very important boolean algebra theorems. 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
Verdict
The clearest difference is review sentiment: LoCAD at 71% against Logic's 0%. LoCAD also leads on price ($1.99 vs $5.99) and update cadence (fortnightly vs every 5 weeks). Logic's advantage is in-app purchases (none vs 1). On ads, monetization model, device support and iOS requirement 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
LoCAD costs $1.99 and Logic $5.99 up front. LoCAD sells 1 one-off in-app purchase. Logic asks for nothing beyond the download.
LoCAD ships an update fortnightly, Logic every 5 weeks. The most recent releases landed on October 24, 2026 and October 11, 2026 respectively.
| Parameter | LoCAD | Logic |
|---|---|---|
| Price | $1.99 — better | $5.99 |
| Rating | 4.5 (2 ratings) — better | — |
| Positive reviews | 71.4% of reviews — better | 0.0% of reviews |
| Number of ratings | 2 — better | — |
| Update frequency | Fortnightly — better | Every 5 weeks |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Paid | Paid |
| Devices | iPad, Mac | iPhone, iPad, iPod — better |
| Requires iOS | 15.6 | 15.1 — better |
| Further details — not scored | ||
| Size | 13 MB | 31 MB |
| Age rating | 4+ | 4+ |
| Developer | Karl-Heinz Loch | Om Prakash Chapagain |
Customer experience
LoCAD
Logic
In-app purchases
LoCAD
- Full version$2.99
Logic
No in-app purchases









