Simply Piano by JoyTunes
JoyTunes
The most downloaded piano learning app — 100 million+ downloads. Highly gamified, listens via microphone or MIDI, 5,000+ songs. ~£15–17/month. Good for first contact with the keyboard; does not teach technique.
More resources on Piano
Mangold Project
Classical piano simplifications and tutorials for learners not yet at full-grade difficulty. ~790K subscribers.
Piano Techniques for Modern Music (Berklee / Coursera)
Berklee College of Music's free-to-audit piano course — posture, sound production, finger independence, popular cadences, and improvisation. One of 40+ Berklee MOOCs on Coursera.
Paul Barton Piano
2,000+ videos of classical tutorials and full performances from Bangkok. A gentle, patient teaching style with ~700K subscribers. Also known for playing Beethoven for rescue elephants.
Learn Piano with Jazer Lee
Focuses on the psychology of adult learning — habit correction, technique streamlining, and the mental game. A primary resource for busy adults fitting practice around work. ~755K subscribers.
Become a Piano Superhuman
Accelerated learning strategies and practice psychology explicitly designed for adult learners who want fast, visible progress. ~913K subscribers.
Josh Wright Piano
DMA from University of Michigan, Billboard #1 classical artist. 700+ videos on classical technique with dual camera angles showing exactly how hands move. ~195K–200K subscribers.