# Deployed app using fly.io/launch/heroku but getting This site can’t be reached **URL:** \ **Category:** General\ **Created:** [August 8, 2022, 10:18pm UTC](https://community.fly.io/t/deployed-app-using-fly-io-launch-heroku-but-getting-this-site-can-t-be-reached/6306 "2022-08-08T22:18:06Z")\ **Posts on this page:** 1\ **Showing post:** 4
**Author:** ![greg](https://sea1.discourse-cdn.com/fly1/user_avatar/community.fly.io/greg/32/2119_2.png) [@greg](https://community.fly.io/u/greg)\ **Post date:** [August 8, 2022, 11:01pm UTC](https://community.fly.io/t/deployed-app-using-fly-io-launch-heroku-but-getting-this-site-can-t-be-reached/6306/4 "2022-08-08T23:01:43Z")
Yep, that’s right for getting to the logs. You can pass an app flag like that. So _that_ works. And yes, sure looks like the app exists and is listening. I haven’t used that Heroku wizard button myself so I’m not sure if you _can_ set your own healthcheck (within a custom `fly.toml` file). But given the final line of that log, I’m not sure that would help. As it would suggest the healthcheck would pass. Hmm. I wonder if _this_ thread would offer any clues. In their case it was an Elixir app, however Lubien explains what Fly does: > [@Migrating an Elixir app from Heroku to Fly.io using fly.io/launch/heroku](https://community.fly.io/t/migrating-an-elixir-app-from-heroku-to-fly-io-using-fly-io-launch-heroku/5965): > > Hello, I am Elixir newbie. I want to create a standalone application on Fly based on the pattern from Heroku to have a test and production version in the future. So I linked Heroku with Fly and created an app which is currently linked. If I understand the process correctly, I now have two separate applications with a separate database and everything needed, but they communicate with each other. I am correct? If I’m right what steps do I need to take to completely break the connection between the… --- _[View the full topic](https://community.fly.io/t/deployed-app-using-fly-io-launch-heroku-but-getting-this-site-can-t-be-reached/6306)._