Scale vs Chord Invaders
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
Scale
Read full descriptionHide full description
Scale-Up! is intended for music players who want to learn scales efficiently. It offers a simple and clean interface, making sure you stay focused while practicing. - Create and play short scale patterns easily. - Supports guitar, bass, ukulele, and keyboard, with various sound banks and custom tunings. - Connect MIDI instruments. - Customize your interface using custom color sets, just the way you like it. Additionally, connect with other users to share your patterns through an optional networking platform.
Chord Invaders
Read full descriptionHide full description
Chord Invaders is a chord-detection game for acoustic and electric guitar. Chord names fall from the top of the screen โ play the chord on your real guitar before it reaches the bottom and watch it explode. The app listens through your iPhone's microphone and recognizes what you play in real time. Hit chords earn points. Missed chords cost lives. SEVEN LEVELS, ORGANIZED BY KEY โข Level 1: G major (G, C, D) โข Level 2: G expanded (adds Em) โข Level 3: C major (introduces F) โข Level 4: D major (introduces Bm barre) โข Level 5: E major blues (A, E, B7, C#m) โข Level 6: Mixed minor keys (Am, Dm, E, F, G, C) โข Level 7: Color chords (7ths, sus chords, Cadd9) PER-CHORD FEEDBACK After each session, see your accuracy per chord, average reaction time, and a personalized recommendation telling you what to practice next. CHORD DIAGRAMS Every level shows the chord shapes โ finger positions, frets, and barre lines โ alongside a short note on the music theory behind why those chords are grouped. BUILT-IN TUNER A vertical-bar guitar tuner helps you get in tune before you play. PRIVACY No accounts, no logins, no analytics. Audio is processed entirely on your device and never recorded or transmitted.
Screenshots
Verdict
The clearest difference is in-app purchases: Scale at none against Chord Invaders's 1. Chord Invaders's advantage is update cadence (every 4 days vs every 5 weeks) and iOS requirement (15.0 vs 18.6). On price, ads and device support there is nothing between them.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
Both are free to download. Chord Invaders sells 1 one-off in-app purchase. Scale asks for nothing beyond the download.
Scale ships an update every 5 weeks, Chord Invaders every 4 days. The most recent releases landed on October 15, 2026 and October 8, 2026 respectively.
| Parameter | Scale | Chord Invaders |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 5 weeks | Every 4 days โ better |
| Ads | No | No |
| In-app purchases | No โ better | Yes |
| Devices | iPhone, iPad | iPhone, iPad, iPod โ better |
| Requires iOS | 18.6 | 15.0 โ better |
| Further details โ not scored | ||
| Size | 46 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Tomas Fernandes | Neerav Mehta |
In-app purchases
Scale
No in-app purchases
Chord Invaders
- Unlock All Levels$1.99









