# SchemaHD vs D1Explorer

The clearest difference is device support: D1Explorer at 3 against SchemaHD's 1. SchemaHD's advantage is iOS requirement (14.0 vs 26.0). 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 D1Explorer sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

SchemaHD ships an update every 10 days, D1Explorer weekly. The most recent releases landed on October 10, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | SchemaHD | D1Explorer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (2 ratings)](https://appshunter.io/ios/app/schemahd/id1578851758/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 10 days | **Weekly** |
| Monetization | Free | — |
| Size | 2 MB | 9 MB |
| Requires iOS | **14.0** | 26.0 |
| Devices | iPad | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Yasuaki Iwasaki](https://appshunter.io/developer/560857505) | [Magenta Creations](https://appshunter.io/developer/492433904) |

## 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 |


### D1Explorer

[App page](https://appshunter.io/ios/app/d1explorer-database-manager/id6761669031)

**Features:** Family Sharing, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| D1Explorer Pro | $5.99 | one-time |


## Frequently asked questions

### Is SchemaHD free?

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

### Is D1Explorer free?

D1Explorer is free to download, with in-app purchases available.

### Do SchemaHD or D1Explorer have ads?

Neither SchemaHD nor D1Explorer shows ads.

### Which is updated more often, SchemaHD or D1Explorer?

SchemaHD ships an update every 10 days, and D1Explorer weekly. Most recently, SchemaHD was updated on October 10, 2026 and D1Explorer on October 6, 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.*