# EEG Mapper — 10/20 electrode EEG guide

> 10/20 electrode EEG guide (iPhone/iPad app by Thomas Eastman.)

- Source: https://appshunter.io/ios/app/eeg-mapper/id6814831557 (this page in markdown: same URL + `.md`)
- Developer: [Thomas Eastman](https://appshunter.io/developer/1258006945)
- Category: Medical, Reference
- Price: Free
- Age rating: 4+
- Requires: iOS 17.0 · 2 MB
- Languages: American English
- Released: 2026-10-02
- Data updated: 2026-10-05

## What is EEG Mapper?

Learn the International 10/20 EEG electrode placement system with this comprehensive learning companion.

The 10/20 system is the global standard for scalp electrode positioning during electroencephalography. This app guides you through every step: learning why 10% and 20% intervals work, finding anatomical landmarks on the human head, converting three simple tape measurements into exact electrode coordinates, and testing your knowledge.

Key Features:

10/20 Learning Guide – A structured 4-step course teaching the system from principles to practice, with landmark detection, measurement technique, and final verification checklist.

Interactive Head Map – Visualize all 21 electrode sites with superior view layout. Sites are color-coded by brain lobe (prefrontal, frontal, temporal, central, parietal, occipital, midline) with region-specific descriptions of typical EEG activity.

10/20 Calculator – Enter three tape measurements (nasion to inion, ear to ear, head circumference) and get precise centimeter positions for every electrode using the standard 10-20-20-20-20-10 cumulative percentage pattern.

Electrode Index – Searchable reference with all 21 sites, legacy nomenclature mappings, and functional notes for each brain region.

Quiz & Self-Test – Practice identifying electrodes on an unlabeled head map. Questions adapt to focus on areas you haven't fully mastered yet.

Progress Tracking – Save your learning progress and pick up where you left off.

Perfect for EEG technicians, Sleep students, and clinical professionals preparing for placement procedures. Whether you're new to the 10/20 system or refining your technique, this app provides fast, practical reference and interactive learning in one place.


## Version history (last 1 release)

### 1.0.0 — 2026-10-03

No release notes.

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-05.*