G·Chord vs Number System Trainer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
G·Chord
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G·Chord is a chord-sheet and setlist app built for worship teams. Build your song library, set the keys your band actually plays in, and present chord charts on stage — without the bloat of apps designed for songwriters. What it does • Transpose any song to any key in one tap. • Build setlists with per-song keys that match how your team plays each Sunday. • Present mode: fullscreen chord sheet, auto-scroll, prev/next through your set. • Tap any chord to see the guitar chord shape. • Offline-first — your library stays on your device. Team sync (optional) • Share songs and setlists with up to 15 band members. • Real-time cloud sync across iPhones in your worship team. • Per-set arrangements and key changes everyone sees together. Built for worship leaders, by a worship leader. Privacy G·Chord stores your songs and setlists on your device. If you create or join a team, an additional copy is stored in Google Firebase so your band can sync. We don't sell or share your data. Full policy at gchord.vercel.app/privacy Support Questions or feedback? Email itsgchord@gmail.com
Number System Trainer
Learn and master the Nashville Number System for music. This app offers interactive modules to help musicians of all levels understand chord progressions, transpose songs, and improve their ear training. It's designed for quick learning and on-the-fly musical communication.
- Interactive learning modules
- Chord reading and identification
- Instant transposition
- Ear training exercises
- Visual chord shapes
- Circle of 4ths & 5ths reference
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Number System Trainer teaches you the Nashville Number System — the method worship musicians and session players use to learn songs fast, transpose on the fly, and communicate with any musician in any key. Whether you're a beginner who only knows 3 chords or an experienced worship leader, this app meets you where you are. 6 INTERACTIVE MODULES • Learn — A 5-step intro to how the number system works • Read Charts — 4 levels from basic chords to slash chords • Transpose — Move full progressions to any key instantly • Ear Training — 3 levels, identify chords just by listening • Play Along — See piano and guitar shapes in every key, with capo tips built in • Circle of 4ths & 5ths — Tap any key to see all 7 chords No login required. Works instantly.
Screenshots
Verdict
The clearest difference is device support: Number System Trainer at 3 against G·Chord's 1. On price, update cadence, ads and in-app purchases there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Both ship on a similar rhythm, roughly weekly. The most recent releases landed on September 23, 2026 and October 2, 2026 respectively.
| Parameter | G·Chord | Number System Trainer |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (10 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 10 — better |
| Update frequency | Weekly | Weekly |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone | iPhone, iPad, iPod — better |
| Requires iOS | 16.4 | 15.0 — better |
| Further details — not scored | ||
| Size | 37 MB | 10 MB |
| Age rating | 4+ | 4+ |
| Developer | Robin Casaljay | Brandon Oaks |
In-app purchases
G·Chord
No in-app purchases
Number System Trainer
No in-app purchases









