# Double+

> Intelligent guitar pickup system control software for practice, performance, and teaching. (iPhone/iPad app by Huizhou Debo Acoustics Co., Ltd..)

- Source: https://appshunter.io/ios/app/double-plus/id1623962082 (this page in markdown: same URL + `.md`)
- Developer: [Huizhou Debo Acoustics Co., Ltd.](https://appshunter.io/developer/1586595923)
- Category: Music, Utilities
- Price: Free
- Rating: 3.43/5 from 7 App Store ratings · 5 written reviews indexed
- Age rating: 4+
- Requires: iOS 14.0 · 99 MB
- Languages: English, German, Hindi, Japanese, Korean, Portuguese, Russian, Chinese, Turkish
- Released: 2022-09-08
- Data updated: 2026-06-05
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/double-plus/id1623962082/reviews.md

## What is Double+?

Double+ is a guitar digital intelligent pickup system control software created by Debo Acoustics based on the user's thinking to make it more interesting for beginner users and more systematic for professional users.

Features:
1. Piezoelectric patch dual-channel independent mixing ratio volume adjustment
2. 4 official preset tone curves and 20 self-customized curve functions.
3. The 8-segment EQ curve of the piezoelectric microphone can be adjusted independently by dragging it.
4. Howling suppression 4-6 suppression frequency points
5. Detailed adjustment of digital effects of compression, reverb, chorus, delay, and distortion.
6. Drum machine, 12x12/144 style drum sets, 12 sound source options
7. Metronome, 10 timbres, and various rhythm and beat combination practice settings
8. Tuning table function, suitable for 21 special tuning schemes such as guitar, ukulele, bass, and standard flat half-tuning.
9. Loop recording function, you can edit the drum set to record and play in a loop at the same time, and record in an infinite loop.
10. Music score function, massive music scores, synchronous playback of audio scores, chord query, and customizable download of my music score collection.
Summary: It is a one-stop intelligent auxiliary tool that integrates guitar playing practice and teacher teaching. It has application scenarios, practice assistance for beginners, stage performances for performers, and teaching assistance for piano store teachers. It is created with the efforts of Debo Acoustics, and technology empowers music. Your musical dreams are within reach.

## Key features

- Dual-channel independent mixing ratio volume adjustment
- Customizable tone curves and EQ settings
- Digital effects (compression, reverb, delay, distortion)
- Integrated drum machine with 144 styles
- Metronome with practice settings
- Tuning table for various instruments
- Loop recording and music score functions

## Recent user reviews (5 of 5)

All indexed reviews: https://appshunter.io/ios/app/double-plus/id1623962082/reviews.md

### 1/5 — No

*2026-01-13*

They want you to input your phone number to use the app.  What the hell for.  Delete.

### 1/5 — Not for Double OS1

*2025-12-21*

This does not work for the Double OS1 product. There is no app for this available so you’ll wish you never bought it. Complete waste of money

### 3/5 — X2 Double Go Prp Pickup

*2025-06-19*

The wireless won’t pair the pickup to the receiver.  I’ve downloaded the app and all the effects and it works nicely as long as you don’t connect to an amp (or PA)… they don’t go out to the amp.  I clicked on the QR code to download the instruction manual. When I scanned it, I a message that I need to put in a credit card but I won’t be charged.  So I put in a credit card and got a message that the card wasn’t accepted and to try another card.  Like an idiot I tried a second card and got the same message.  I didn’t try that again and shortly after I got messages from both card companies asking if I’d made two charges of around $40 each.  The QR code is a scam. I had to close both cards for fraudulent transactions.  So I still can’t get a manual and there’s absolutely no way to get customer support.  The pickup sounds great plugged in wirelessly but I wish the effects would go to my amp.  I have two of the other Double pickups without the effects.  I love those but really thought the Go Pro would be much better but it wasn’t worth the extra cost.

### 2/5 — Double+ X2

*2025-04-20*

Tuner doesn’t work.  Effects only work in the app and not just from the pickup.  Customer support is non-existent.

### 5/5 — Absolutely INCREDIBLE

*2025-03-30*

The X2 Double GO Pro Preamp is AMAZING. And so is the app. I bought it on Amaz0n and it’s sold under different names but it’s the X2 Double and it’s from Double Acoustics. I don’t even use this with any external amp, haven’t even tried the wireless. I just stuck the little transmission inside the guitar (moves and creates vibrations,) plugged it into the soundhole preamp unit, got the app and that’s it. I can play my acoustic guitar with reverb, chorus, compressor and/ or delay. And it sounds great. This is not some cheesy device, it’s a very high quality unit. The app has virtual pedals that are fully adjustable. Just a note: the old version of the unit is still available so be sure to get the X2 Double if you plan to check it out. My acoustic guitar has never been more fun. And no you don’t need an acoustic/ electric to use this.

## Frequently asked questions about Double+

### What is Double+?

Double+ is a guitar digital intelligent pickup system control software. It aims to make guitar playing more interesting for beginners and more systematic for professionals by offering a range of practice and performance tools.

### What instruments can Double+ tune?

Double+ features a tuning table function suitable for 21 special tuning schemes, including guitar, ukulele, and bass, as well as standard flat half-tuning.

### Does Double+ have a drum machine?

Yes, Double+ includes a drum machine with 12x12/144 style drum sets and 12 sound source options, allowing for diverse practice rhythms.

### Can I record with Double+?

Yes, Double+ offers a loop recording function. You can edit the drum set to record and play in a loop simultaneously, with infinite loop recording capabilities.

### What kind of effects are available in Double+?

Double+ provides detailed adjustment of digital effects, including compression, reverb, chorus, delay, and distortion, allowing users to shape their guitar sound.

### Is Double+ available on Android?

Based on the provided data, Double+ is supported on iPhone, iPad, and iPod. Information regarding Android compatibility is not available.

### How often is Double+ updated?

The latest version of Double+ is 1.3.9, last updated on March 30, 2026. This indicates a recent update, suggesting ongoing development and support.

### Does Double+ have ads?

No, Double+ does not contain advertisements. The application is free to use without any ad interruptions.

## Version history (last 5 releases)

### 1.3.10 — 2026-04-20

1、Optimize the limit on the number of login verification code messages.
2、Add language type support to the API interface.

### 1.3.9 — 2026-03-30

The delay, reverb, chorus, and other effects on the L1 Loop device must not be turned off or deleted.

### 1.3.8 — 2026-03-24

1. Optimize the App's interface color scheme.

### 1.3.7 — 2026-03-19

1.  Optimize the interface of the ES1 series effect processor;
2.  Add filter condition parameters to the Cloud Tones list.

### 1.3.6 — 2026-03-17

1. Optimized compatibility with Yifeng guitars;
2. Optimized the review mechanism for Tone color;

## Apps similar to Double+

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [吉他世界](https://appshunter.io/ios/app/id1477456343) | 3.2 (6) | Free | Music |
| [有谱么-钢琴,吉他等各类曲谱](https://appshunter.io/ios/app/id973743727) | 4.8 (75) | Free | Music |
| [AIMusic-Guitar,Piano,Ukulele](https://appshunter.io/ios/app/aimusic-guitarpianoukulele/id1246637618) | 4.7 (45) | Free | Music |
| [虫虫吉他-吉他尤克里里钢琴键盘课](https://appshunter.io/ios/app/id1449345358) | 2.6 (5) | Free | Music |
| [Natasha Guitars](https://appshunter.io/ios/app/natasha-guitars/id6446880096) | 5.0 (1) | Free | Music |
| [SONICLINK](https://appshunter.io/ios/app/soniclink/id6596747219) | 4.5 (11) | Free | Music |

---

*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 2026-06-05.*