Skill Development
How the tracked guitar skills grow from the exercises you play, and how achievement badges are unlocked.
The app tracks 23 individual guitar skills (alternate picking, legato, bending, vibrato, chords, scales, rhythm, ear training, improvisation, transcription and so on), grouped under the same four categories used everywhere else: technique, theory, hearing and creativity.
Each skill card shows what it is, what feeds it, and the exercises that train it.

Every exercise you complete as part of a logged session feeds the skills it's tagged with. There's no cap and nothing to level up into. A skill is a running total that only ever goes up, so the number is a record of attention paid, not a grade.
The gaps are the point. A card sitting at 2 XP with one green box isn't a failing grade, it's a shortlist: those crossed-out boxes are exercises you could do tonight.
The same number is labelled "XP" on an individual skill card and "Level" on the category summary. It's the same value shown two ways, and nothing is being tracked twice.
Use it as a mirror rather than a target: if theory has barely moved in a month, that's the useful information here, and Practice → Exercises lets you pick a drill for exactly that gap.
Achievements are badges. They pay no points and no Fame; they're recognition, not currency.
Each one has its own unlock condition (reaching a streak, logging a certain amount of practice, hitting particular milestones), checked automatically against what you've done.

They come in four rarities, shown by the colour of the badge:
The ones most players pick up early
A bit of consistency required
Long-term commitment
Rare enough to be worth showing off
How do I gain skill XP?
Play the exercises tagged with that skill and log the session. Free-form practice time raises your points, but only exercises feed specific skills
Can a skill go down?
No. Skill totals never decrease
Do achievements give rewards?
No, they're collectible only. Everything you actually spend comes from Fame
Where do I see my badges?
On your profile, alongside your level and stats