When comparing Proton native vs B4X, the Slant community recommends B4X for most people. In the question“What are the best tools for building cross-platform desktop apps with web technologies?” B4X is ranked 5th while Proton native is ranked 7th.
Ranked in these QuestionsQuestion Ranking
Pro Open source
Pro Uses native tools
Not running a browser to manage the GUI, it uses less resources than the alternatives.
Pro No chromium
Is not based on chromium.
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 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 Create easy, fast and with less code cross-platform views
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 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 Many informative video tutorials
The tutorials help beginners as well as more experienced programmers grasping important concepts.
Pro The best tool with the best service by Erel
Con Not popular
Not being popular as electron js, its development isn't quite at the same pace.
Con No styling
Being based on libui, CSS styling isn't available.