# Cherub Metro Tuner

> Digital tuner, tone generator, and metronome for musicians. (iPhone/iPad app by Cherub Technology Co. Ltd.)

- Source: https://appshunter.io/ios/app/cherub-metro-tuner/id1151318098 (this page in markdown: same URL + `.md`)
- Developer: [Cherub Technology Co. Ltd](https://appshunter.io/developer/468999269)
- Category: Music, Utilities
- Price: Free
- Rating: 1.00/5 from 2 App Store ratings · 2 written reviews indexed
- Age rating: 4+
- Requires: iOS 8.0 · 17 MB
- Languages: American English, Chinese (Simplified, China)
- Released: 2016-09-20
- Data updated: 2026-06-25
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/cherub-metro-tuner/id1151318098/reviews.md

## What is Cherub Metro Tuner?

Cherub Technology’s "Nux Metro Tuner" is a digital tuner, tone generator and metronome for the iPhone. Featuring a host of tuning styles, "Nux Metro Tuner" calls upon Cherub’s more than 14 year experience in tuner development to make it the most accurate tuner in the iPhone App market.

ACCESSORIES
Its too loud to use the iPhone’s mic? No Problem. Simply plug your instrument directly into the iPhone using the Cherub GB2i Guitar/Bass/ iPhone converter. Keep it inline with the THRU jack. You need a little personal time with your instrument?  Plug your earphones into the mini earphone jack and start creating.  
"Nux Metro Tuner" was developed by Cherub Technology Co., Ltd., Shenzhen, China.

FEATURES:
METRONOME
•Six time signatures: 2/4,3/4, 4/4, 5/4 and 6/8
•Downbeat indicator: On/ Off . 
•Female voice count

TUNER
•Supports multiple instruments including Guitar, Bass, Violin, & Ukulele
•Chromatic, Guitar, Bass, Violin, Ukulele
•Guitar & Bass mode only: Flat tuning up to 4 semitones/Open G/Drop D
•Extended tuning range: A0 to C8
•A4 calibration from 430 Hz to 450 Hz

TONE GENERATOR
•Chromatic, Guitar, Bass, Violin, Ukulele
•Guitar & Bass mode only: Flat tuning up to 4 semitones/Open G/Drop D
•A4 calibration from 430 Hz to 450 Hz

REQUIREMENTS
Internal mic (iPhone, iPad), apple earphones with microphone or external interface device (GB2i Converter iPhone, iPad ,or iPod Touch), another iPhone-compatible instrument cable.

## Key features

- Multiple tuning styles
- Tone generator
- Metronome with 6 time signatures
- Supports Guitar, Bass, Violin, Ukulele
- Flat tuning and Drop D
- A4 calibration

## Recent user reviews (2 of 2)

All indexed reviews: https://appshunter.io/ios/app/cherub-metro-tuner/id1151318098/reviews.md

### 1/5 — no

*2019-04-10*

You have to be 2 centimeters away for it to pick up your instrument, does not work!

### 1/5 — Sir

*2018-06-24*

This apps tuner does not work.

## Frequently asked questions about Cherub Metro Tuner

### What instruments does Cherub Metro Tuner support?

Cherub Metro Tuner supports a variety of instruments including Guitar, Bass, Violin, and Ukulele. It offers specific modes for Guitar and Bass with features like flat tuning and Drop D.

### Can I use Cherub Metro Tuner without the iPhone's microphone?

Yes, if the iPhone's microphone is too loud, you can plug your instrument directly into the iPhone using a Cherub GB2i Guitar/Bass/iPhone converter. You can also plug in earphones for personal practice.

### What time signatures are available in the metronome?

The metronome in Cherub Metro Tuner offers six time signatures: 2/4, 3/4, 4/4, 5/4, and 6/8. It also includes an optional downbeat indicator and a female voice count.

### What is the tuning range of Cherub Metro Tuner?

Cherub Metro Tuner has an extended tuning range from A0 to C8. The A4 calibration can be adjusted from 430 Hz to 450 Hz.

### Does Cherub Metro Tuner have ads?

No, Cherub Metro Tuner does not contain advertisements.

### What devices is Cherub Metro Tuner compatible with?

Cherub Metro Tuner is compatible with iPhone, iPad, and iPod Touch devices.

### How often is Cherub Metro Tuner updated?

The app was last updated on May 17, 2017, with version 1.0.4. It was initially released on September 20, 2016.

### What is the user rating for Cherub Metro Tuner?

Cherub Metro Tuner has a rating of 1.0 stars based on 2 ratings.

## Version history (last 3 releases)

### 1.0.4 — 2017-05-17

This app has been updated by Apple to display the Apple Watch app icon.

fix bugs on iPhone7(plus).

### 1.0.3 — 2016-10-13

fix bugs
Add Privacy of Microphone Usage Description.

### 1.0.1 — 2016-09-19

No release notes.

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All apps by Cherub Technology Co. Ltd: https://appshunter.io/developer/468999269

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-25.*