Comparison

SchemaHD vs Blink Shell, Build & Code

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

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
Read full description

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.

About

Blink Shell, Build & Code

Transform your iOS device into a powerful terminal for coding and development. Leverage Mosh and SSH for stable, fast connections. Integrate with VS Code and manage your entire development workflow from your pocket.

Highlights
  • Mosh and SSH connections
  • VS Code integration (Blink Code)
  • Remote runtime creation (Blink Build)
  • Full SSH toolset
  • Hardware keyboard support
  • External display support
  • SFTP transfers
Features
Read full description

Do Blink! Transform your iOS device into a pro-grade terminal. Blink is the first professional, desktop-grade terminal for iOS that leverages the support of Mosh and SSH. Thus, we can guarantee stable connections, crazy-fast speeds, and full configurations. It can and should be your all-day-long tool.  **Start your 14-day free trial now!** But, Blink is much more. Now with Blink Code and Blink Build**, your entire development workflow fits in your pocket. What the Blink community is saying: “In some ways, I prefer my iPad / Blink / Digital Ocean setup to coding on my Mac“ - TheVerge "I have tried a number of terminals on iOS and this is really The One." - Twit.tv “Connections still come up when I get back to a client project after a weekend off.“ - The Sweet Setup “The way to use VS Code on the iPad” - programminglife.io What our users love the most from Blink Shell: - Mosh connections that even survive a device reboot. - Most complete SSH implementation on iOS. - Code command for VS Code integration. - Blazingly fast terminal and SFTP transfers. - Includes Pragmata Pro with ligatures. Blink Shell has a fully loaded SSH toolset: - SSH with PKI support: DSA, RSA, ECDSA & ED25519 keys. - Support for Secure Enclave Keys and Certificates. - Port forwarding with local, remote & dynamic tunnel support. - SOCKS5 proxy for a private VPN. - Agent Forwarding. - Complete SSH Config file support. - ControlMaster and pooled connections. - Files.app integration for SFTP remote hosts. - SFTP with copy-on-change. Blink has been the leading developer tool in the AppStore for +5 years, so there is a lot more: - External Display support. - Legendary Hardware Keyboard support, even remap shortcuts and keyboard codes. - Local & iCloud Blink Shell folders for Files.app access across devices. - Host sync over iCloud. - Link-files from other applications and work with them in Blink. - Cool themes and fonts, and install your own! - Smart Keys on SW Keyboard to navigate with touch. - FaceCam command to create tutorials and streams. - Bell notifications. - Supports multiple windows and multiple tabs. - Network & UNIX CLI tools, check our docs for more information. Blink Code integrates with VS Code: - Code on local projects, or seamlessly on remote machines. - Fully-loaded code editor. - A coding experience fitted to your device, that connects to VS Code for web, GitHub Codespaces, GitPod or your own VS Code server. Blink Build (Requires a $7.99/month subscription) Creates remote runtimes that can be accessed on all your devices. You can use Build in your day-to-day workflows whether you need to do development, DevOps or just play around with new tooling. Participate in our community, and don’t forget to leave us your feedback and your feature(s) requests. Enjoy! http://blink.sh http://twitter.com/blinkshell http://GitHub.com/blinksh Terms of Use: https://blink.sh/blink-gpl Privacy Policy: https://blink.sh/pp * Blink Code is not affiliated nor endorsed by Microsoft. ** Blink Build requires a separate subscription to make use of our Virtual Machines.

Screenshots

Blink Shell, Build & Code4 screens

Verdict

The call

The clearest difference is monetization model: SchemaHD at free against Blink Shell, Build & Code's free with in-app purchases. SchemaHD also leads on review sentiment (50% vs 37%) and update cadence (every 10 days vs every 3 weeks). Blink Shell, Build & Code's advantage is ratings volume (418 vs 2) and chart position (#11 vs unranked). On price, rating, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. SchemaHD sells 7 one-off in-app purchases and Blink Shell, Build & Code sells 5 in-app purchases, starting at $7.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 3.0 for SchemaHD against 3.1 for Blink Shell, Build & Code. That said, the two scores are not equally well evidenced: Blink Shell, Build & Code has 418 ratings behind it against 2, so its average is the more settled of the two. Written reviews are what separate them: 50% of SchemaHD's written reviews are positive against 37% of Blink Shell, Build & Code's.

UpkeepUpdate frequency

SchemaHD ships an update every 10 days, Blink Shell, Build & Code every 3 weeks. The most recent releases landed on June 6, 2026 and September 24, 2026 respectively.

Scorecard6 real differences · 5 level
SchemaHD versus Blink Shell, Build & Code: the parameters behind the verdict, then further details
ParameterSchemaHDBlink Shell, Build & Code
PriceFreeFree
Rating3.0 (2 ratings)3.1 (418 ratings) — better
Positive reviews50.0% of reviews — better36.9% of reviews
Number of ratings2418 — better
Update frequencyEvery 10 days — betterEvery 3 weeks
AdsNoNo
In-app purchasesYesYes
MonetizationFree — betterFree with in-app purchases
Best chart rank—#11 — better
DevicesiPadiPhone, iPad — better
Requires iOS14.0 — better17.6
Further details — not scored
Size2 MB211 MB
Age rating4+17+
DeveloperYasuaki IwasakiBlink Shell, Inc

Customer experience

SchemaHD

All ratings2 ratings
Positive50.0%
Neutral0.0%
Negative50.0%
Written reviews2 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

Blink Shell, Build & Code

All ratings418 ratings
Positive51.7%
Neutral2.6%
Negative45.7%
Written reviews344 reviews
Positive36.9%
Neutral2.3%
Negative60.8%

In-app purchases

7 purchases

SchemaHD

One-time7
  • Give a tip #1$1.99
  • Give a tip #2$3.99
  • Give a tip #3$7.99
Show 4 more
  • Give a tip #4$15.99
  • Give a tip #5$23.99
  • Give a tip #6$39.99
  • Give a tip #7$79.99
5 purchases

Blink Shell, Build & Code

Subscriptions4
  • Build Basic - 50 credits/month1 Month trial$7.991 Month
  • Blink+Build Basic7 Days trial$9.991 Month
  • Blink Plus$19.991 Year
Show 1 more
  • Blink+14 Days trial$19.991 Year
One-time1
  • Blink Shell ClassicFree

Questions

Is SchemaHD free?
SchemaHD is free to download, with in-app purchases available.
Is Blink Shell, Build & Code free?
Blink Shell, Build & Code is free to download, with in-app purchases available.
Which has better reviews, SchemaHD or Blink Shell, Build & Code?
Blink Shell, Build & Code is rated higher. SchemaHD averages 3.0 out of 5 from 2 ratings, while Blink Shell, Build & Code averages 3.1 from 418 ratings.
Do SchemaHD or Blink Shell, Build & Code have ads?
Neither SchemaHD nor Blink Shell, Build & Code shows ads.
Which is updated more often, SchemaHD or Blink Shell, Build & Code?
SchemaHD ships an update every 10 days, and Blink Shell, Build & Code every 3 weeks. Most recently, SchemaHD was updated on June 6, 2026 and Blink Shell, Build & Code on September 24, 2026.

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