Doppi, the nicest player for your music files

In my first adventure returning to music files (*.mp3, *.flac) in 2023, I mentioned an iOS app called Doppi as a great discovery. It was the app I chose to accompany me on my second attempt, which was successful this time.
That’s why I thought it was worth highlighting the app (“the nicest player for your music files”). Not only is it great, but it has also gotten some amazing new features:
- Nearby Doppis (version 5.1), to find other iPhones with Doppi installed on the same network in order to exchange music. For reasons I'm sure you understand, I was never able to test it.
- Synchronized song lyrics (5.2). Doppi itself searches for and downloads the lyrics with just one click. It's just like the similar feature in Apple Music and other streaming apps.

- Equalizer (5.3). My ears aren't refined enough to make use of this, but I know that many people swear they need a good equalizer.
- Localization in Brazilian Portuguese (5.4.1).
The latter was especially satisfying because I helped with the translation.
The previous version (5.4) had expanded support to other languages, but did not include pt_BR. I sent an email to Radu Dutzan, Doppi's developer, asking for my language.
He was one step ahead. Thanks to these generative AI translators, he already had an almost complete translation in testing. I installed the beta version and contributed about a dozen corrections and improvements (like fixing strings in European Portuguese).
I was happy to help. It's an app I use a lot.
Oh, an important detail: unlike Apple Music, Doppi can read *.flac files.
If you listen to your own music files on your iPhone and/or iPad, Doppi is well worth it. It is paid, with a subscription option (USD 1.69/month) and a lifetime license (USD 16.99).