Thanks for your reply and for your piece of advice.
I´m after an Android DAP with offline Tidal capability, and there is currently a good offer on EBay for this DAP (328,50€). I think all DAPs with this capability suffer from the same battery drain issues when they are used for audio streaming purposes (like the Ibasso DX200).
I´ve read some comments advising to buy a Smartphone instead, such as the LG V30, for streaming purposes, but I prefer a dedicated DAP.
I know Lotoo is currently working on an Android DAP, but the price will probably be too high to be worth it.
I was considering also Fiio DAPs (X5-III, X7-II), but as far as I have read they have some firmware problems I don´t want to face.
I also read about OPUS#2 and #3, but they are not pure Android DAPs, and Onkyo-X1 is essentialy the same as this Pioneer.
Any other recommendation? I think this Pioneer has all I am after at a really interesting price, but I wonder if there will be in a short time a better option talking about battery life.