When comparing Xojo vs B4X, the Slant community recommends B4X for most people. In the question“What are the best ways to make a cross-platform application?” B4X is ranked 1st while Xojo is ranked 6th.
Ranked in these QuestionsQuestion Ranking
Pro Easy to use
Easy to make compiled native apps.
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 Subscription-based/Not free
Using this product you're betting the company will still be around. If they get bought out by an enterprise that wants to use the tech internally, all they need to do is stop offering subscriptions and suddenly you're scrambling to rebuild your entire app on other technology.
Con No Android support
They plan to eventually support Android, but for now, they only support iOS.
Con Suspicious upvotes
Most upvoters do not show any other activity than their upvote for B4X, which looks very suspicious.