I just signed up for a new trigger.io account and am using the free trial.
I want to know, if
I will be shown a splash screen with trigger.io branding on my app if am building on the free trial version,
I will be able to build for iOS, android and windows
I will be able to upgrade once I have an app ready and get access to al additional OS' with my old code written during my free trial.
From my experience with Trigger.io...
Yes you will have a trigger.io splash screen. Your own custom splash screen is a 'premium module'
You will be able to build for iOS and Android (and web/browser). Windows is premium
All your code is kept locally, so you keep that on your own machine / SVN - and yes could use the same code that you wrote in the trial.