It shows so much promise
A mess and appears to be in violation of copyright
Besides the public domain translations here, the app looks to violate translator Pettit’s Creative Commons license (the app has a shop/is commercial) and the developer is charging users $11.99 for download Crawford’s translation, which is certainly copyrighted.
I would be surprised if the developer has Crawford’s publisher’s permission to sell a version of his translation through this app.
Response from developer
Future update will spell out license with Crawford’s translation. It is licensed. Attempts to get in contact with E G Pettit have been made to clear up what “non commercial” means with regards to the licensing rights for Creative Commons works. Current build though has a link to both the original source and the Creative Commons license as well as the base JSON data for all of the translations sans Crawford. It is our understanding to be in compliance with the license, if subject matter experts would like to contact me, feel free to do so. Edit: Ah hell. Everything but licensed content is now free.
