# LispPad Go vs SchemaHD

The clearest difference is review sentiment: LispPad Go at 96% against SchemaHD's 50%. LispPad Go also leads on rating (4.9 vs 3.0) and in-app purchases (none vs 7). SchemaHD's advantage is update cadence (every 10 days vs every 2 months) and iOS requirement (14.0 vs 18.6). On price, ads, monetization model and device support there is nothing between them.

Both are free to download. SchemaHD sells 7 one-off in-app purchases. LispPad Go asks for nothing beyond the download.

LispPad Go holds the better App Store score, 4.9 against 3.0. That said, the two scores are not equally well evidenced: LispPad Go has 37 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 96% of LispPad Go's written reviews are positive against 50% of SchemaHD's.

LispPad Go ships an update every 2 months, SchemaHD every 10 days. The most recent releases landed on November 7, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | LispPad Go | SchemaHD |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (37 ratings)](https://appshunter.io/ios/app/lisppad-go/id1565747728/reviews)** | [3.0 (2 ratings)](https://appshunter.io/ios/app/schemahd/id1578851758/reviews) |
| Number of ratings | **37** | 2 |
| Positive reviews | **96.3% of reviews** | 50.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 10 days** |
| Monetization | Free | Free |
| Size | 135 MB | 2 MB |
| Requires iOS | 18.6 | **14.0** |
| Devices | **iPhone, iPad** | iPad |
| Age rating | 4+ | 4+ |
| Developer | [Matthias Zenger](https://appshunter.io/developer/1258939759) | [Yasuaki Iwasaki](https://appshunter.io/developer/560857505) |

## What reviewers say

### LispPad Go

[App page](https://appshunter.io/ios/app/lisppad-go/id1565747728)

This app is a lightweight integrated development environment for writing and running Scheme code on iOS devices. It features a Scheme interpreter, a text editor with syntax highlighting, and a console for interactive programming. It also includes a wide range of libraries and supports integration with the Shortcuts app.

**Highlights:** Integrated Scheme interpreter, Text editor with syntax highlighting, Console with REPL, R7RS-compliant libraries, iOS-specific libraries, Shortcuts app integration

**Features:** macOS Compatibility, Vision Pro support, iPhone Duo support

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is LispPad Go free?

LispPad Go is free to download, with no in-app purchases.

### Is SchemaHD free?

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

### Which has better reviews, LispPad Go or SchemaHD?

LispPad Go is rated higher. LispPad Go averages 4.9 out of 5 from 37 ratings, while SchemaHD averages 3.0 from 2 ratings.

### Do LispPad Go or SchemaHD have ads?

Neither LispPad Go nor SchemaHD shows ads.

### Which is updated more often, LispPad Go or SchemaHD?

LispPad Go ships an update every 2 months, and SchemaHD every 10 days. Most recently, LispPad Go was updated on November 7, 2026 and SchemaHD on November 3, 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.*