# SchemaHD vs Breadpad

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.

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.

## The numbers

| Metric | SchemaHD | Breadpad |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (2 ratings)](https://appshunter.io/ios/app/schemahd/id1578851758/reviews) | **[3.9 (157 ratings)](https://appshunter.io/ios/app/breadpad-spice-simulator/id6443904179/reviews)** |
| Number of ratings | 2 | **157** |
| Positive reviews | **50.0% of reviews** | 34.2% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 10 days** | Fortnightly |
| Monetization | **Free** | Freemium |
| Best chart rank | — | **#124** |
| Size | 2 MB | 60 MB |
| Requires iOS | **14.0** | 18.0 |
| Devices | iPad | **iPhone, iPad, Mac, Vision Pro** |
| Age rating | 4+ | 4+ |
| Developer | [Yasuaki Iwasaki](https://appshunter.io/developer/560857505) | [FreshBizOpps, LLC](https://appshunter.io/developer/1506039373) |

## What reviewers say

### SchemaHD

[App page](https://appshunter.io/ios/app/schemahd/id1578851758)

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.

**Highlights:** Draw logic circuit diagrams, Generate Verilog HDL, Perform circuit simulations, Touch-based wiring, AXI bus interface support, JSON import/export, Offline network operation

**Features:** macOS Compatibility

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Give a tip #1 | $1.99 | one-time |
| Give a tip #2 | $3.99 | one-time |
| Give a tip #3 | $7.99 | one-time |
| Give a tip #4 | $15.99 | one-time |
| Give a tip #5 | $23.99 | one-time |
| Give a tip #6 | $39.99 | one-time |
| Give a tip #7 | $79.99 | one-time |


### Breadpad

[App page](https://appshunter.io/ios/app/breadpad-spice-simulator/id6443904179)

**Currently charting:** #124 Top Free · Developer Tools (US App Store)

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.

**Highlights:** Interactive digital breadboard, SPICE netlist simulation, Virtual oscilloscope and logic analyzer, Extensive component library, Custom component creation, Circuit snapshotting, Cloud collaboration

**Features:** Game Controller support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Breadpad Subscription | $4.99 | per month |
| Annual Breadpad Subscription | $39.99 | per year |
| Lifetime Premium | $139.99 | one-time |

**What reviewers like**

- 💡 Innovative breadboard simulation concept
- 🎓 Useful learning tool for electronics students
- 🔬 Advanced simulation features with oscilloscope
- ⚡ Responsive developer with frequent updates
- 🎨 Good visual design and layout

**What reviewers complain about**

- 🐛 Frequent crashes and stability issues
- ❌ Missing essential components (LEDs, buttons, switches)
- 🖱️ Poor UI/UX with unintuitive controls
- 🔍 Zoom limitations - can't see full breadboard
- 🚫 Cannot move or rotate components after placement

**Reported bugs**

- 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

**Requested features**

- LEDs and LED indicators
- Push buttons and switches
- 555 timer IC
- Comparators in chip library
- Op-amps and more analog components


## Frequently asked questions

### Is SchemaHD free?

SchemaHD is free to download, with in-app purchases available.

### Is Breadpad free?

Breadpad is free to download, with in-app purchases available.

### Which has better reviews, SchemaHD or Breadpad?

Breadpad is rated higher. SchemaHD averages 3.0 out of 5 from 2 ratings, while Breadpad averages 3.9 from 157 ratings.

### Do SchemaHD or Breadpad have ads?

Neither SchemaHD nor Breadpad shows ads.

### Which is updated more often, SchemaHD or Breadpad?

SchemaHD ships an update every 10 days, and Breadpad fortnightly. Most recently, SchemaHD was updated on June 6, 2026 and Breadpad on September 23, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*