SchemaHD vs Breadpad
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SchemaHD
This app allows users to draw circuit diagrams for logic circuits, generating Verilog HDL and performing simulations. It simplifies FPGA development by using schematics instead of complex programming languages, offering advanced security and high-performance parallel processing.
- Draw logic circuit diagrams
- Generate Verilog HDL
- Perform circuit simulations
- Touch-based wiring
- AXI bus interface support
- JSON import/export
- Offline network operation
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FPGAs can dynamically generate logic circuits by means of configuration bit streams generated by languages such as Verilog and VHDL. The generated logic circuit cannot be changed by communication data. Therefore, it is very safe and cannot be attacked by hacking, which is a problem with CPUs, to execute arbitrary commands. In addition, the generated logic circuits are all running simultaneously, so the highest performance parallel processing is being performed. It can also generate logic circuits using configuration bitstreams at very high speed. Most of the processing that can be done by the CPU can be done by the FPGA alone. With advanced security and the highest performace, FPGAs are the perfect device for the modern age. However, it takes a lot of effort to learn languages such as Verilog and VHDL. There are other methods such as high-level synthesis from C/C++, but they require a lot of adjustments such as #pragma, and do not maximize the capabilities of the FPGA. Schematics, not programming languages, are needed to maximize the capabilities of FPGAs and to further improve developer productivity. Schematics allow you to grasp the whole picture at a glance, and can perfectly represent parallel processing. SchemaHD is to draw a circuit diagram of a logic circuit, and it's possible to do generation of Verilog HDL and a simulation. A made circuit diagram can be used by a different circuit diagram immediately. You can also install wiring easily by touch operation. A concept of interface is adopted as a terminal, so something structured of a AXI bus can also be used. A terminal it's also possible to distinguish sound argument reason, negative logic and characteristic wiring of a clock and a reset by interface, and which is different in interface, they don't seem able to connect, it is. You can input and output as a JSON file, so the made circuit diagram and interface are also capable of cooperation with other application. Verilog HDL generated from a circuit diagram contains a comment of a terminal name and an instance name, so it's capable of the correspondence which is at the time of problem occurrence. A network connection isn't needed, so it's also effective in information leak prevention. A simple simulation is offered in the present, but it's expected to enhance it early.
Breadpad
Design and simulate electronic circuits on an interactive digital breadboard. Analyze designs with virtual oscilloscopes and logic analyzers, and perform precise SPICE netlist simulations. Offers a free tier with core features and a premium subscription for advanced analysis and export.
- Interactive digital breadboard
- SPICE netlist simulation
- Virtual oscilloscope and logic analyzer
- Extensive component library
- Custom component creation
- Circuit snapshotting
- Cloud collaboration
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Breadpad is your go-to analog/digital electronics lab, featuring an interactive breadboard and advanced SPICE simulation. Easily add components, wire them up, and analyze your circuits with a virtual oscilloscope and logic analyzer. Execute full SPICE netlists for unparalleled precision. Choose from a vast library of ready-to-use parts or create your own custom elements. Dive in for free or upgrade to unlock powerful data export capabilities and superior simulation features. Free Features: - Effortlessly wire up components on a digital breadboard - Choose from over 400 integrated circuits or craft your custom chips using SPICE - Insert resistors, capacitors, inductors, transistors, and diodes with accurate models - Instantly see how changes affect your circuit with quick-rendering graphs - Take snapshots of your breadboard setups for easy inclusion in documents or online - Import PSPICE and LTSpice netlists for comprehensive simulations (.spice and .cir files) - Work together using iCloud, iMessage, Airdrop, email, Google Drive, OneDrive, and Dropbox - Explore a wide selection of pre-configured diodes and transistors with numerous tweakable settings - Open any .breadpad file at no cost, even those from Premium users - Experience your designs in 3D with Apple Vision Pro Premium subscription unlocks: - Infinite vector plotting from your SPICE simulations - Conduct temperature sensitivity analysis to assess environmental impacts on circuits - Access five extra voltage sources, including piecewise and frequency-modulated options - Export your simulation results to CSV for analysis in tools like Excel, MATLAB, or Python - Directly modify the SPICE netlist for any component on your breadboard - Fine-tune component tolerances using six-sigma gaussian distributions - Analyze manufacturing variance effects with dynamic Monte Carlo simulations Whether you're a student, hobbyist, or professional engineer, Breadpad is the perfect tool for brainstorming, designing, and refining your circuit ideas. Explore new principles, experiment with designs, and optimize existing systems. Get Breadpad today and elevate your circuit simulation experience. Exclusively on iPad, iPhone, Mac, and Vision Pro. Privacy policy: https://breadpad.com/privacy/ Terms of use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is rating: Breadpad at 3.9 against SchemaHD's 3.0. Breadpad also leads on ratings volume (157 vs 2) and chart position (#124 vs unranked). SchemaHD's advantage is monetization model (free vs freemium) and review sentiment (50% vs 34%). On price, update cadence, ads and in-app purchases 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
Both are free to download. SchemaHD sells 7 one-off in-app purchases and Breadpad sells 3 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.
Breadpad holds the better App Store score, 3.9 against 3.0. That said, the two scores are not equally well evidenced: Breadpad has 157 ratings behind it against 2, so its average is the more settled of the two. Written reviews complicate that: 50% of SchemaHD's written reviews are positive against 34% of Breadpad's, so the app with the better star average is not the one people write more warmly about.
SchemaHD ships an update every 10 days, Breadpad fortnightly. The most recent releases landed on June 6, 2026 and September 23, 2026 respectively.
| Parameter | SchemaHD | Breadpad |
|---|---|---|
| Price | Free | Free |
| Rating | 3.0 (2 ratings) | 3.9 (157 ratings) — better |
| Positive reviews | 50.0% of reviews — better | 34.2% of reviews |
| Number of ratings | 2 | 157 — better |
| Update frequency | Every 10 days — better | Fortnightly |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free — better | Freemium |
| Best chart rank | — | #124 — better |
| Devices | iPad | iPhone, iPad, Mac, Vision Pro — better |
| Requires iOS | 14.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 2 MB | 60 MB |
| Age rating | 4+ | 4+ |
| Developer | Yasuaki Iwasaki | FreshBizOpps, LLC |
Customer experience
SchemaHD
Breadpad
Bugs and requests
SchemaHD
Not enough reviews yet to summarise bugs or requests.
Breadpad
Reported bugs
15 issues- App crashes on startup or when creating new breadboard
- App crashes when placing components
- App crashes when using oscilloscope
- App crashes when adding capacitors
- Circuits don't save between sessions
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- SPICE models don't save
- Black screen or blank window on launch
- Breadboard displays then disappears
- Component inventory disappeared after update
- Cannot access components on iPhone
- Oscilloscope shows false resistor value errors
- Chips take a long time to load
- Cannot exit summary after requesting chips
- visionOS version crashes immediately
- File becomes unopenable after oscilloscope crash
Requested features
17 requests- LEDs and LED indicators
- Push buttons and switches
- 555 timer IC
- Comparators in chip library
- Op-amps and more analog components
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- H-bridges
- Motors
- Multimeter functionality
- In-app tutorials and documentation
- Electronics handbook with basic circuits
- Custom chip creation tutorial using SPICE
- Prebuilt circuit templates
- Better component library organization
- One-time purchase option instead of subscription
- Online video demonstrations
- AR experience features
- Physics engine integration
In-app purchases
SchemaHD
- Give a tip #1$1.99
- Give a tip #2$3.99
- Give a tip #3$7.99
Show 4 moreShow fewer
- Give a tip #4$15.99
- Give a tip #5$23.99
- Give a tip #6$39.99
- Give a tip #7$79.99
Breadpad
- Monthly Breadpad Subscription7 Days trial$4.991 Month
- Annual Breadpad Subscription1 Month trial$39.991 Year
- Lifetime Premium$139.99
Questions
Is SchemaHD free?
Is Breadpad free?
Which has better reviews, SchemaHD or Breadpad?
Do SchemaHD or Breadpad have ads?
Which is updated more often, SchemaHD or Breadpad?
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