Hello, my friends,
I wanted to share with you that I've been working on an Android app to aid in learning guitar and bass scales. You can find it on the Google Play Store under the name "Guitar Scales Patterns Lite", and it's entirely free. I'd greatly appreciate your feedback if you decide to give it a try.
... go to Guitar Scales Patterns Lite on Google Play Store
Additionally, there's a paid version available with more scales (over 140). However, I believe the free version offers a good starting point. If you do decide to explore the extended content, you can find it under the name "Guitar Scales Patterns Plus". I created this version to help cover development costs, but I've yet to achieve the desired success.
... go to Guitar Scales Patterns Plus on Goolge Play Store
Sending my best wishes to all.