When comparing ASP.NET Core vs B4X, the Slant community recommends B4X for most people. In the question“What are the best tools for making a cross-platform application?” B4X is ranked 1st while ASP.NET Core is ranked 11th.
Ranked in these QuestionsQuestion Ranking
Pro Fast and getting faster
Thanks to breakthroughs in ROSLYN compiler and the efforts of the .NET COre developer team, code written in C# can reach speeds just a step behind C++.
Pro Multi platform
Can run on Windows, Linux and Mac (also Visual Studio Code editor).
Ability to host on IIS, Nginx, Apache, Docker, or self-host in your own process.
Pro Ease of Use
It is a very secure platform.
Pro Built-in middleware
Both VS and VSCode are powerful free IDEs that are well integrated with ASP.net Core. VS Community also allows for commercial use for projects with less than 5 developers.
Pro JSON optimization
In .NET Core 2.1 and 3.0, new APIs are added that make it possible to write JSON APIs that require less memory, using Span<T> and UTF8 strings, and improve throughput of applications like Kestrel, ASP.NET Core web server. See also Utf8JsonReader.
Pro Tutorials and documentation quality
Both microsoft and 3rd party tutorials are mostly of high quality and encourage you to use the industry best-practices.
Pro A very active forum where you can find any issue you have, and quick answers to new ones
Pro A highly motivated program author who is very active in the forums
Erel Uziel is simply the most pro-active Soft-Creator/Forum Manager you will ever come across. If it has not yet been asked & answered, just ask and you will be answered withing minutes, and thanks to it being a trully international forum, this is achieved 24h/7d.
Pro Create easy, fast cross-platform views with less code
B4XUI custom views are designed, by Erel and other forum members, exactly with this in mind; custom views that act and feel exactly the same no matter what platform you target.
Pro Very easy to use and powerful for IoT
Support for Bluetooth/BLE, MQTT, TCP/UDP, Serial, NFC, Websockets, HTTP/2 across platforms makes it the ideal tool for IoT projects.
Pro Live code swapping
A huge productivity boost when you can run your apps on the devices and make code changes real time without needing to recompile.
Pro Powerful general purpose programming tool
As mentioned in its website, "With B4X, anyone who wants to, can develop real-world solutions."
Pro No complexities compared with other tools
No need to learn JAVA, C+, PHP, or any other complementary languages in order to achieve exactly what you need.
Pro The best all round
Produces highly optimised end results. Easy to use and quick to learn. When you know how to produce an Android app you near enough know how to produce an IOS app.
The fact that there are subtle differences between writing for different platforms is a huge plus - those differences help optimise your code and they're really not difficult to wrap your head round.
Pro Erel has much passion for his tool
The speed of answer topics is amazing.
Pro Many informative video tutorials
The tutorials help beginners as well as more experienced programmers grasping important concepts.
Pro Many code examples of fully working apps for free
The Forum is filled with many code examples of fully working apps for free. Code snippets, animation, different type of views etc. can be easily downloaded and used in your own app.
Pro Large user community
Over the years it has built up a very active user community that is very involved in the evolution of B4X. In their forums you can find any answer to your questions, and if it is not there, they will answer you.
VERY Rapid Application Development, with tons of pro features.
Pro Tightly integrated framework
Pro Almost everything is free and complete
Except the IDE for iOS. Even so it's very cheap.
Con Microsoft environment
Con Lack of B4W real Web app
Erel needs to make a real Web app designer.
Con Only for Windows
The IDE, while very handy, only runs on Windows. If you want to code on Mac or Linux, you have to install it on a virtual machine. But you can debug your app by running it on the target OS.
Con Java-dependent Desktop Development
Con The documentation and examples and tutorials are not up to date
The documentation and examples and tutorials are not up to date.