I see this work as a customization of the code of FreeOTP, available under Apache 2.0 licence, at https://fedorahosted.org/freeotp/
I would like an app generating token like Authy or Google Authenticator, but only for my webservice (no need to manage various services).
I would like a basic logic of displaying my company logo, registering the user email and PIN to access the token, and link the app/token generation with my webservice. Cloud-backup or multi-device support can be options.
When using my webservice, the user will first enter his PIN to view the token in the app, then input the token on the webpage.
Has to be compatible for all Android version from 4.4 included, and all iOS from iOS 8 included.
That's it for a first version!