# ZB PocketCX vs JustinGuitar Note Trainer

The clearest difference is price: ZB PocketCX at Free against JustinGuitar Note Trainer's $4.99. JustinGuitar Note Trainer's advantage is chart position (#52 vs unranked). On update cadence, ads, in-app purchases and device support there is nothing between them.

ZB PocketCX is free to download; JustinGuitar Note Trainer costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ZB PocketCX ships an update every 2 weeks, JustinGuitar Note Trainer fortnightly. The most recent releases landed on October 2, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | ZB PocketCX | JustinGuitar Note Trainer |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| Rating | — | **[4.4 (5 ratings)](https://appshunter.io/ios/app/justinguitar-note-trainer/id6761114951/reviews)** |
| Number of ratings | — | **5** |
| Positive reviews | — | 80.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Fortnightly** |
| Monetization | — | Paid |
| Best chart rank | — | **#52** |
| Size | 33 MB | 40 MB |
| Requires iOS | 15.1 | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Zimmer, Inc](https://appshunter.io/developer/496317854) | [Justin Guitar](https://appshunter.io/developer/502491353) |

## What reviewers say

### ZB PocketCX

[App page](https://appshunter.io/ios/app/zb-pocketcx/id6450453825)

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

**In-app purchases:** none


### JustinGuitar Note Trainer

[App page](https://appshunter.io/ios/app/justinguitar-note-trainer/id6761114951)

**Currently charting:** #52 Top Paid · Education (US App Store)

Master the guitar fretboard quickly with daily exercises designed to build a deep understanding of note locations. This app helps you stop guessing and start knowing every note on your guitar, improving your playing.

**Highlights:** Learn fretboard notes fast, Daily 5-minute exercises, Build mental map of guitar neck, Stop guessing, start knowing notes, Smart repetition for weak spots, Practice anywhere on your phone

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

**In-app purchases:** none


## Frequently asked questions

### Is ZB PocketCX free?

ZB PocketCX is free to download, with no in-app purchases.

### Is JustinGuitar Note Trainer free?

JustinGuitar Note Trainer costs $4.99, with no in-app purchases.

### Do ZB PocketCX or JustinGuitar Note Trainer have ads?

Neither ZB PocketCX nor JustinGuitar Note Trainer shows ads.

### Which is updated more often, ZB PocketCX or JustinGuitar Note Trainer?

ZB PocketCX ships an update every 2 weeks, and JustinGuitar Note Trainer fortnightly. Most recently, ZB PocketCX was updated on October 2, 2026 and JustinGuitar Note Trainer on October 25, 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.*