# Fretboard Memorization Toolbox

> Learn the guitar fretboard through fun musical drills.

Canonical page: [https://chrome-stats.com/d/string.systems.fretboard](https://chrome-stats.com/d/string.systems.fretboard)

## Overview

- **ID:** `string.systems.fretboard`
- **Platform:** Android
- **Type:** Android app
- **Status:** Available
- **Publisher:** String Systems
- **Category:** EDUCATION
- **Downloads:** 15,936
- **Rating:** 3.93 / 5 (30 ratings)
- **Version:** 3.58.0.12
- **Last updated:** 2026-01-29
- **First published:** 2023-07-11
- **Publisher country:** CY
- **Size:** 87 MB
- **Data as of:** 2026-09-26
- **Store listing:** [Google Play Store](https://play.google.com/store/apps/details?id=string.systems.fretboard)
- **Website:** [https://string.systems](https://string.systems/)
- **Privacy policy:** [https://string.systems/privacy-policy](https://string.systems/privacy-policy)

## Description

The Fretboard Memorization Toolbox is an engaging Chrome extension designed to help guitarists master the guitar fretboard through enjoyable musical drills and structured lessons. Developed by Prokopis Skordis, a professional guitarist and educator with over 20 years of teaching experience, this mini-course offers four video lessons and seven progressive levels of guided drills paired with fun backing tracks, making fretboard learning both effective and entertaining.

Beyond the core drills, users gain access to extra weekly lessons and additional courses such as "SFS Fretboard Secrets" and the "Open Chord Workshop." The extension reflects a proven teaching method refined over decades and digitized for convenient learning. Whether you're a beginner or looking to refine your fretboard knowledge, this tool provides a rewarding path to navigating the guitar with confidence.

## Rankings

- #475,620 — Overall

## Permissions and access

### Permissions

- `android.permission.ACCESS_ADSERVICES_AD_ID`
- `android.permission.ACCESS_ADSERVICES_ATTRIBUTION`
- `android.permission.ACCESS_ADSERVICES_TOPICS`
- `android.permission.ACCESS_NETWORK_STATE`
- `android.permission.ACCESS_WIFI_STATE`
- `android.permission.FOREGROUND_SERVICE`
- `android.permission.FOREGROUND_SERVICE_MEDIA_PLAYBACK`
- `android.permission.INTERNET`
- `android.permission.POST_NOTIFICATIONS`
- `android.permission.READ_APP_BADGE`
- `android.permission.READ_EXTERNAL_STORAGE`
- `android.permission.VIBRATE`
- `android.permission.WAKE_LOCK`
- `android.permission.WRITE_EXTERNAL_STORAGE`
- `com.anddoes.launcher.permission.UPDATE_COUNT`
- `com.android.vending.BILLING`
- `com.google.android.c2dm.permission.RECEIVE`
- `com.google.android.finsky.permission.BIND_GET_INSTALL_REFERRER_SERVICE`
- `com.google.android.gms.permission.AD_ID`
- `com.htc.launcher.permission.READ_SETTINGS`
- `com.htc.launcher.permission.UPDATE_SHORTCUT`
- `com.huawei.android.launcher.permission.CHANGE_BADGE`
- `com.huawei.android.launcher.permission.READ_SETTINGS`
- `com.huawei.android.launcher.permission.WRITE_SETTINGS`
- `com.majeur.launcher.permission.UPDATE_BADGE`
- `com.oppo.launcher.permission.READ_SETTINGS`
- `com.oppo.launcher.permission.WRITE_SETTINGS`
- `com.sec.android.provider.badge.permission.READ`
- `com.sec.android.provider.badge.permission.WRITE`
- `com.sonyericsson.home.permission.BROADCAST_BADGE`
- `com.sonymobile.home.permission.PROVIDER_INSERT_BADGE`
- `me.everything.badger.permission.BADGE_COUNT_READ`
- `me.everything.badger.permission.BADGE_COUNT_WRITE`
- `string.systems.fretboard.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION`

## Review summary

### Pros

- Good for beginners and intermediate users
- Access to lessons is easy and convenient
- Effective teaching by Prokopis
- Compliments a free course available on the website
- User appreciates the musical approach to learning

### Cons

- Limited content and interactivity
- Mostly serves as an advertisement for paid courses
- Some users feel it lacks depth and usefulness
- Considered a 'teaser' for premium content

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Source: [Chrome-Stats](https://chrome-stats.com/d/string.systems.fretboard)