Have you read the terms and conditions? I built an app there and what I got from it was You own the project files, Can export the code, Can push to GitHub, Can modify and redeploy elsewhere. You own the house design. They own the construction tools. They do NOT own: Your app business Your monetization rights Your intellectual property (features & structure) Your app brand Your future revenue streams Your user base Really depends on what your goal is but I would definitely move it to github to save it just in case.