# ChordProg Ear Trainer vs Zero to 1

The clearest difference is in-app purchases: Zero to 1 at none against ChordProg Ear Trainer's 2. ChordProg Ear Trainer's advantage is device support (3 vs 1) and iOS requirement (14.0 vs 16.4). On price, update cadence and ads there is nothing between them.

Both are free to download. ChordProg Ear Trainer sells 2 in-app purchases, starting at $2.99 per month. Zero to 1 asks for nothing beyond the download.

ChordProg Ear Trainer ships an update every 5 days, Zero to 1 every 4 days. The most recent releases landed on November 2, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | ChordProg Ear Trainer | Zero to 1 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (16 ratings)](https://appshunter.io/ios/app/chordprog-ear-trainer/id1454739512/reviews)** | — |
| Number of ratings | **16** | — |
| Positive reviews | 75.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 5 days | **Every 4 days** |
| Monetization | Free with in-app purchases | — |
| Size | 116 MB | 53 MB |
| Requires iOS | **14.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [DevDa AS](https://appshunter.io/developer/1708225323) | [Founder Progress Ltd](https://appshunter.io/developer/6797513502) |

## What reviewers say

### ChordProg Ear Trainer

[App page](https://appshunter.io/ios/app/chordprog-ear-trainer/id1454739512)

This app offers a realistic music training experience by using real audio clips to teach chord progressions, intervals, chords, and scales. It provides over 500 audio clips for practice and is designed to help prepare users for ear training tests.

**Highlights:** Chord progression recognition, Interval recognition exercises, Chord recognition exercises, Scale recognition exercises, 500+ real audio clips, Music theory exploration, Regular updates with new features

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly premium subscription! | $2.99 | per month |
| Yearly Premium Subscription! | $24.99 | per year |


### Zero to 1

[App page](https://appshunter.io/ios/app/zero-to-1/id6797513500)

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

**In-app purchases:** none


## Frequently asked questions

### Is ChordProg Ear Trainer free?

ChordProg Ear Trainer is free to download, with in-app purchases available.

### Is Zero to 1 free?

Zero to 1 is free to download, with no in-app purchases.

### Do ChordProg Ear Trainer or Zero to 1 have ads?

Neither ChordProg Ear Trainer nor Zero to 1 shows ads.

### Which is updated more often, ChordProg Ear Trainer or Zero to 1?

ChordProg Ear Trainer ships an update every 5 days, and Zero to 1 every 4 days. Most recently, ChordProg Ear Trainer was updated on November 2, 2026 and Zero to 1 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.*