Why turn it into an app though? This kind of learning materials is something that can be done in a construction of a website which is more accessible for everyone as an app would just simply make them download and as well clear/allocate some memory for your app. Is this just because of ads or is this a school project of yours? Well if it is a school project I don't think it would be impressive for you or your professors having an app that's only use is to be clickable and has reading materials on it. If it is for ad purposes I think you can still earn on ads and applying it into a website which I think is the best route to go for this kinds of content.
The reason we decided to go with an app is because we believe in the improved UX that an app provides. The features that a native app brings are much more user friendly and you have additional features like push notifications to motivate users to finish the course. The learning effect is increased immensely with an app. Apps like Duolingo prove this.
I don't know when exactly you start on cryptocurrency, but I believe we have a lot of sources to learn it online right now. Anyone who wanted to learn about crypto would probably use Google and find those articles instead of looking for an app.
So yeah, would be cool if you either add the web version.
I know that a website is easier to use and that's why we also plan to develop a web app in the future.
Those permissions are common in many informative applications and doesn't really have any harm on someone's device. This would be better if the OP would publish his code in github for a better in-depth analysis of the system. Yes, interactive websites are better but there are certain situations, especially when it is for academic purposes, that building it in a mobile application is wayy simpler than publishing and hosting it in a website. Also, note that there are tons of websites that also offers the same thing.
Therefore, application like this is still better and would be best if published to be an open-sourced app. @OP, if you worry about gaining profit out of you project, such informative application shouldn't be your choice as you cannot have any clients to cover your costs. Better publish a donatable address in your app and website as well.
Thank you very much for your comment. We would really like to release the app as an open source project. The problem is that I am very inexperienced with open source projects. I want to avoid the code being used by someone else who wants to create an app about some altcoin I don't want to support, for example. Is there any way to restrict the use of an open source code? You seem to know a lot about open source projects. I would really appreciate some advice.
We already have a donation link on the website in the footer. We may need to make this more prominent on the website.
Thanks a lot to everyone for your feedback!