When comparing MonoDevelop vs Xojo, the Slant community recommends MonoDevelop for most people. In the question“What are the best free cross-platform (mobile and desktop no web) app development frameworks that can be used to create commercial apps?” MonoDevelop is ranked 1st while Xojo is ranked 5th.
Ranked in these QuestionsQuestion Ranking
Pro Starting up this program doesn't take as long as starting Visual Studio windows 98
MonoDevelop is free to download and use.
Pro Easy to use
Easy to make compiled native apps.
Con No longer supported (deprecated since 2018)
Con Bad formatting
MonoDevelop doesn't offer much in terms of autocompletion and code formatting. Most of the time the automatic formatting that MonoDevelop does is annoying and not really compliant with C# guidelines.
Con The MonoDevelop version that ships with Unity is several versions behind
The version of MonoDevelop that ships with Unity is several versions behind the main MonoDevelop branch. It also gets updated very rarely so any annoying bugs that it may have take a lot of time to get fixed.
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.