7 Chords was a guitar-reference app associated with Handplant Studios. The archived January 19, 2009 page identifies seller Stefan Wundrak and App Store ID 291618376. Its reviewed interface combined chord diagrams with audio examples.
This historical guide describes that version. The surviving review is not evidence of the current catalog, price or compatibility of a download using the same name.
Read the diagram before chasing the sound
The archived review describes finger positions, note information and alternate fingerings reached by moving through additional pages. Selection controls chose a chord’s root and type. Audio could present individual notes or the chord together.
Those elements answer related questions. A diagram shows a proposed placement on the instrument; an audio example gives something to compare with what you play. Neither replaces understanding which strings and frets the diagram actually represents.
Compare one change at a time
For practice, choose a familiar chord and inspect another fingering of the same harmony. Notice which positions move and which notes remain part of the shape. Keeping the musical question small makes it easier to connect the image with the physical action.
Then compare the sound of the individual strings with the combined chord. If something sounds different, return to the diagram and check the intended placement rather than repeatedly changing several fingers at once. This is a study approach, not a claim that the old app listened to or graded a performance.
A reference has a different job from a course
A large chord library is useful when you know what you want to look up. Learning a piece also involves timing, transitions and listening, which are different tasks. Decide whether you need a quick reference or a structured sequence of lessons before evaluating a music app.
7 Chords’ documented strength was the relationship between visual notation and audible examples. Its archive preserves that design idea without requiring the old app to remain available today.