What is Reddit's opinion of waveen~ isochronic tones free?

From 3.5 billion Reddit comments

Just a quick update, and sorry if my instructions were unclear(?) but I found an app that uses a good amount (including the sleep tones) of the music from iso-tones. The app is a bit simplistic but it does the job so hopefully it helps.

https://play.google.com/store/apps/details?id=com.gdlvalley.waveen&hl=en_US&referrer=utm_source%3Dgoogle%26utm_medium%3Dorganic%26utm_term%3Dwaveen+app&pcampaignid=APPU_1_vXIoW_29GseazwK3poyQDg

I like "Waveen."