The future of a popular smartphone app based on the political insults of Paul Keating is in doubt after talks between the former prime minister and the app's creator.

The Paul Keating Insult Generator hit app stores this week, and is currently the most popular paid app on Apple's Australian iTunes store.

App developer Dan Nolan spoke to Mr Keating after rumours he was upset with the app.

Mr Nolan is in talks with lawyers about the future of the insult generator.