What is the best alternative to Piano Marvel - Lessons & Music on iPhone?

Notevision - Sight Reading, S tier, #1 in music reading.

Is there a free alternative to Piano Marvel - Lessons & Music?

Yes: Notevision - Sight Reading (S tier, #1) is free to download, with in-app purchases.

Yes. 2 apps rank above it in music reading: Notevision - Sight Reading (#1), Learn Music Notes Piano (#2).

Piano Marvel - Lessons & Music is A tier, #3 of 8 in music reading. Here is everything that competes with it on iPhone, in tier order.

1
Notevision - Sight ReadingShigher tier
Free + IAP · ★ 4.8 · 3,286 ratings · score 91
Sight-reading practice app for piano, violin, viola and cello, with exercises, chord reference and progress tracking.
2
Learn Music Notes PianoA
Free download · ★ 4.4 · 5,442 ratings · score 86
Free education app for learning to read music notes with flashcards, note games, and simple piano melodies.
4
ScoreSkills- Learn Music NotesB
Free + IAP · ★ 4.6 · 1,966 ratings · score 70
Free music app for learning to read, write, and play notes through ear training, sight reading, and music theory.
5
Notes TeacherC
Free + IAP · ★ 4.8 · 10,156 ratings · score 69
Teaches music note reading through 32 step-by-step lessons and practice modes for treble and bass clefs.
6
Music Tutor (Sight-reading)C
Free download · ★ 4.2 · 2,237 ratings · score 66
Practice reading sheet music by identifying notes in timed or untimed sessions across treble, bass and alto clefs.
7
TenutoC
$4.99 · ★ 4.7 · 665 ratings · score 61
Music theory practice app with 24 customizable exercises for notes, keys, intervals, scales and chords, plus six theory.
8
Note Rush: Music Reading GameD
$8.99 · ★ 4.3 · 2,424 ratings · score 59
Music note-reading flashcard game that listens to you play each note and gives instant feedback and stars.

What is the best alternative to Piano Marvel - Lessons & Music on iPhone?: Notevision - Sight Reading, S tier, #1 in music reading.
Is there a free alternative to Piano Marvel - Lessons & Music?: Yes: Notevision - Sight Reading (S tier, #1) is free to download, with in-app purchases.
Does anything rank above Piano Marvel - Lessons & Music?: Yes. 2 apps rank above it in music reading: Notevision - Sight Reading (#1), Learn Music Notes Piano (#2).