Countless solo-made phone apps, with decent sales. Sort of a like a return to the 1-man video game shop. And although you're talking about solo... There's was

Countless solo-made phone apps, with decent sales. Sort of a like a return to the 1-man video game shop. And although you're talking about solo... There's was a 2-man dream team in the DC area. Not sure if they're still working. They would tackle any project and get it done fast. Any language or tech stack. Design docs, requirements, working project, everything. They tackled in-distress projects where a large team and multi-million dollar budge failed.