Desktop or mobile? If mobile, Android?
Discussion
desktop...
is there a jumble ios app?
No but you can run the website locally:
https://github.com/CodyTseng/jumble?tab=readme-ov-file#run-locally
You can use nostr:npub17n4cuc4d6y6qh89dekvxrenfkt5s0n49xns00uavjaxpr36c55dq87fyh9 on iOS as PWA. Works great.