1 to A vs Number System Trainer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
1 to A
Learn the Nashville Number System for music. Select a key and instantly see corresponding chords. Tap any number to view fingering diagrams.
- Nashville Number System explained
- Chord translations for major keys
- Fingering diagrams for chords
- Key selection
- Interactive chord lookup
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Ever wonder how people play music with a number? 1 to A makes sense of the number system and shows you the translation for all major keys. Simply select a key and see the chord that corresponds! Don't know how to play that chord? We got you just click on the number and view the fingering!
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 in-app purchases: Number System Trainer at none against 1 to A's 1. Number System Trainer also leads on ratings volume (12 vs 3) and iOS requirement (15.0 vs 18.5). On price, rating, review sentiment and ads 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. 1 to A sells 1 one-off in-app purchase. Number System Trainer asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 5.0 for 1 to A against 5.0 for Number System Trainer. Both are backed by a comparable volume of ratings — 3 and 12 respectively. Written reviews split almost evenly too, at 100% and 100% positive.
| Parameter | 1 to A | Number System Trainer |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (3 ratings) | 5.0 (12 ratings) |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 3 | 12 — better |
| Update frequency | — | Weekly |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 18.5 | 15.0 — better |
| Further details — not scored | ||
| Size | 14 MB | 10 MB |
| Age rating | 4+ | 4+ |
| Developer | Sean Moses | Brandon Oaks |
Customer experience
1 to A
Number System Trainer
In-app purchases
1 to A
- 1 to A Premium$1.99
Number System Trainer
No in-app purchases
Questions
Is 1 to A free?
Is Number System Trainer free?
Which has better reviews, 1 to A or Number System Trainer?
Do 1 to A or Number System Trainer have ads?
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