Prove it mattered
Translate what you built into the language of work saved, knowledge captured and people helped.
For employees who solved the problem before anybody commissioned the solution
Useful internal software is often born with the wrong pedigree: made by the person who understood the work, rather than the team that usually buys software.
Give management a bounded continuation decision instead of asking it to endorse an indefinite experiment.
What you get
The first person using your app is called innovation. The fifth can be called a governance issue. The software did not change. Its social status did.
Translate what you built into the language of work saved, knowledge captured and people helped.
A defined boundary, owner and exit route make experimentation feel less like adopting a mysterious animal.
Ask for a limited pilot, the tools you need and a credible plan for what happens if people keep liking it.
A manager can decline enthusiasm. A priced, bounded proposal with an owner and a stop button is more awkward to dismiss.