All you wanted to suggest

ONLY FOR SUBSCRIPTION OWNERS. Due to the fact that paid translation services is very expensive for the subscription price (2$ monthly), it is impossible to offer unlimited use of this feature for subscribers. There is an idea to allow subscription users to pay for traffic packages ($30-40 per million characters), and then spend this traffic at the user’s discretion. Perhaps these will be smaller packages. $3-4 per 100,000 characters. You can compare the cost with the size of the book yourself. For example, a DeepL costs €20 per million characters. My price is higher due to taxes and commissions from Google, government and other intermediaries.

Sync books between devices of a single account

Function: -pause -back -forward -repeat original text significantly improves narrator, making use more comfortable, useful and enjoyable

Sometimes I also want to improve the original text, e.g. I download subtitles from YouTube that are not broken into sentences, there are only words but no punctuation marks. I would correct this while reading.

I just have concerns as to whether or not the pricing model could be kept indefinitely without a raise of price in the future. In short how does the app limit and overusage of the AI tokens since everyone use case is different? Wouldn't it be a better approach to allow users to attach their own API token so even in the future case of an inevitable price increase on all generative AI services, users of this app wouldn't be affected by such and be double charged in the economy? I personally wouldn't mind paying a one time option to unlock the ability to attach own API key. Please take this into serious consideration!

After reading a book, you will rate it, and based on the books you liked, ChatGPT will advise you the next one

Backup - no option to save locally (to the main storage of the gadget)

I would like to be able to swap the translated text. those. download the book in your native language, then download an offline translation of it, which you have implemented and using some kind of reverse button, “turn over” the book and the translation while reading.

make text more easy and nice to read.

I don't know if the app is under a different name on the appstore, but the one I find is a completely different one where almost the only resemblance is the logo. It lacks practically every feature that makes this app good and looks like it got stuck in the beta a long time ago. It saddens me since I've used and supported this app for so long due to how helpful and great is to learn languages, but unfortunately since recently getting an iOS device I will have to stop using it and find another app. I hope this is just the app being called different and not intuitively to find in there. In the meantime, thank you for your support on Android, hope you have the time or opportunity to make it in iOS.

It's much easier to see the current reading progress when it's at the top, and it looks nice. It should also be very easy to implement. (Make sure it will be displayed behind the status bar)

can you please increase the size of the covers a little bit because it's much easier to recognize the book if it's in an unknown languages

Sync saved words between devices of a single account

I'd like to save some phrases or paragraphs to re-read in the future, further investigate about it, etc. This is a basic feature that almost every other book reading app has and I think I'd benefit greatly its overall user experience

I would like to have a shelf of the books, that had been read. Sometimes need to mark the book - had been read. It would be wonderful if i could create my shelves... or folders... i'd like to have min 3 shelves - Reading now + Have read + Will read soon