Open-source SSH app for iPhone I don't trust any SSH app on the App Store to make secure connections.

Any clue if there exist open-source terminals for iPhone or iOS?
The best ssh client I've used on iOS is Prompt from Panic Software. 

That being said, there are open source ssh clients for iOS, like Blink Shell. If you have a dev license (100 dollars), you can build it and push it to your phone. Or pay the 20 dollars and get it from the app store.