Questions, bugs, or suggestions? We read every message.
📧 The fastest way to reach us is by email: codon-one@gmx.de. We usually reply within a few days.
Module 1 is free. The other modules can be unlocked with an in-app purchase — either individually or all together. Open any locked module to see the options.
Purchases are tied to your Apple ID, so they transfer for free. Open the shop or a locked module and choose Restore Purchases while signed in with the same Apple ID.
Codon One follows your device language automatically. Change your language in the iOS Settings → General → Language & Region, and the app will switch. Inside a lesson you can also tap the menu to temporarily view the original English text.
Open the Progress screen and use the erase option in the top corner. This clears your quiz results, success rates and review history on that device.
We'd love to hear it. Inside a lesson, use the "Rate translation" option to flag translation quality, and you can submit questions from the quiz area — or just email us at codon-one@gmx.de.
Codon One runs on iPhone and iPad. We recommend keeping iOS/iPadOS up to date for the best experience.
Email codon-one@gmx.de with your device model and iOS version, and a short description (or screenshot) of the issue — that helps us solve it faster.
See also our Privacy Policy.
