# Trill vs Number System Trainer

The clearest difference is review sentiment: Number System Trainer at 100% against Trill's 20%. Number System Trainer also leads on in-app purchases (none vs 10) and rating (5.0 vs 4.6). Trill's advantage is ratings volume (1.9K vs 12) and chart position (#92 vs unranked). On price, ads, monetization model and device support there is nothing between them.

Both are free to download. Trill sells 10 in-app purchases, starting at $4.99 per month. Number System Trainer asks for nothing beyond the download.

Number System Trainer holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Trill has 1.9K ratings behind it against 12, so its average is the more settled of the two. Written reviews point the same way: 20% of Trill's written reviews are positive against 100% of Number System Trainer's.

Trill ships an update fortnightly, Number System Trainer weekly. The most recent releases landed on November 8, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Trill | Number System Trainer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (1.9K ratings)](https://appshunter.io/ios/app/trill-ear-training-daily/id6742758221/reviews) | **[5.0 (12 ratings)](https://appshunter.io/ios/app/number-system-trainer/id6786437503/reviews)** |
| Number of ratings | **1.9K** | 12 |
| Positive reviews | 20.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Fortnightly | **Weekly** |
| Monetization | Freemium | Free with in-app purchases |
| Best chart rank | **#92** | — |
| Size | 92 MB | 10 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [gmol6.studio s.r.o.o](https://appshunter.io/developer/1799805657) | [Brandon Oaks](https://appshunter.io/developer/6786437505) |

## What reviewers say

### Trill

[App page](https://appshunter.io/ios/app/trill-ear-training-daily/id6742758221)

**Currently charting:** #92 Top Grossing · Music (US App Store)

Develop your musical ear with daily, focused exercises. This app transforms ear training into an engaging game with challenges and rewards, helping you learn to recognize tones, chords, and keys naturally. It also includes tools like a tuner and metronome.

**Highlights:** Daily ear training exercises, Chord, interval, and scale visualizers, Tuner and metronome, Gamified learning with challenges and badges, Focus Lock to block distractions, Progress tracking and achievements

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Access – Trill Pro | $4.99 | per month |
| Monthly Access - Trill Pro | $9.99 | per month |
| Weekly Access - Trill Pro | $9.99 | per 7 days |
| Monthly Access - Trill Pro | $12.99 | per month |
| Annual Special – Trill Pro | $14.99 | per year |
| Annual Deal – Trill Pro | $14.99 | per year |
| Yearly Access - Trill Pro | $24.99 | per year |
| Yearly Access - Trill Pro | $39.99 | per year |
| Yearly Access - Trill Pro | $49.99 | per year |
| Yearly Access - Trill Pro | $59.99 | per year |


### Number System Trainer

[App page](https://appshunter.io/ios/app/number-system-trainer/id6786437503)

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.

**Highlights:** Interactive learning modules, Chord reading and identification, Instant transposition, Ear training exercises, Visual chord shapes, Circle of 4ths & 5ths reference

**Features:** macOS Compatibility, Family Sharing

**In-app purchases:** none


## Frequently asked questions

### Is Trill free?

Trill is free to download, with in-app purchases available.

### Is Number System Trainer free?

Number System Trainer is free to download, with no in-app purchases.

### Which has better reviews, Trill or Number System Trainer?

Number System Trainer is rated higher. Trill averages 4.6 out of 5 from 1.9K ratings, while Number System Trainer averages 5.0 from 12 ratings.

### Do Trill or Number System Trainer have ads?

Neither Trill nor Number System Trainer shows ads.

### Which is updated more often, Trill or Number System Trainer?

Trill ships an update fortnightly, and Number System Trainer weekly. Most recently, Trill was updated on November 8, 2026 and Number System Trainer on October 31, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*