How Can We Help You?

Have questions, experiencing audio issues, or want to suggest new words? We are here to support your Serbian learning journey.

Contact Support

Our dedicated support team typically replies within 24 hours.

✉️ Email Us (support@aboptima.com)

Frequently Asked Questions

🎤 Why is the app not recognizing my voice in speaking exercises?
To practice speaking, iOS requires two specific permissions:
  • Microphone Permission: Allows audio input.
  • Speech Recognition Permission: Converts spoken phonemes into text.
To check your permissions: open your iPhone Settings > Odi and ensure both Microphone and Speech Recognition toggles are turned on (Green).
🔊 I cannot hear any sound from the pronunciation buttons.
Please check the following:
  • Ensure your iPhone volume is turned up using the physical volume buttons on the side of your device.
  • Make sure your phone is not connected to a silent Bluetooth device or AirPods in your bag.
  • Odi is optimized to play through the main loudspeaker even in silent mode, but if you still hear no sound, try restarting the app.
🧠 How does the Spaced Repetition System (SRS) work?
Odi uses a spaced repetition algorithm to schedule word reviews at scientifically calculated intervals. When you practice a word correctly, its review interval expands (1 day, 3 days, 7 days, 16 days, etc.). If you struggle with a word, the app brings it back for review sooner so it moves into your permanent memory.
✈️ Can I practice Serbian offline?
Yes! The first 5 foundational courses and their complete audio sets are bundled directly into the app. You can also download the remaining 35 courses while connected to Wi-Fi to enjoy completely offline learning on planes or road trips.
🔄 How do I reset my learning progress?
If you want to start fresh from Unit 1, go to the Settings tab inside Odi and select Reset Learning Progress. This will re-initialize your spaced repetition intervals and word mastery statistics.