TL:DR someone re-uploaded my MIT-licensed open-source app to the iOS App Store.
I have created a small app for iPhone, which has been available on the App Store for over 2 years now.
It is licensed under MIT and I am the copyright owner. I accept contributions under the MIT-license. All information, including contributors and libraries are mentioned in the app's about page.
Recently I found that someone has compiled the app, removed the about section and changed the app icon, as well as the name. Then that person uploaded it to the iOS App Store, where it is now available alongside my own app.
I would like to know whether this is legal. While I am happy to share the code with others for educational purposes and for allowing others to improve their apps (in fact that's why I open-source it), I am not happy that an identical copy of my app exists on the App Store.
LICENSE FOR REFERENCE
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.