SoundHound is a bit like Shazam, but on steroids. If it wasn't for Shazam's integration with OK Google, SoundHound would be the only music identification app I have on my phone, because it doesn't just do searches of music playing around you, it can also recognize songs you sing or hum. It works more often than you'd think, even with a couple of missed lyrics, out of tune notes, and even half-accurate hums.
SoundHound also has the benefit of the Hound voice assistant, which means that you can ask it to identify a song, add it to your Spotify playlist, get information about artists and releases, and more without touching a single button. The app has a free version with unlimited searches but also ad banners, and an ad-free version that removes the latter for $5.99. That's the one going on discount today — only in a few countries.
You can grab it for EUR 0.10 in France, Italy, Spain, and Germany, GBP 0.10 in the UK, RUB 10 in Russia, and AUD 0.20 in Australia. Most of these amount to $0.10-0.15, which is way, way less than the original $5.99 price, but as you must have noticed, the US isn't among the countries benefiting from the deal.