# D'Tools

> All-in-one utility kit for guitar players with chords, scales, tuner, and metronome. (iPhone/iPad app by D'Addario & Company, Inc..)

- Source: https://appshunter.io/ios/app/dtools/id375703586 (this page in markdown: same URL + `.md`)
- Developer: [D'Addario & Company, Inc.](https://appshunter.io/developer/308730620)
- Category: Music, Utilities
- Price: Free with in-app purchases
- Rating: 3.60/5 from 30 App Store ratings · 150 written reviews indexed
- Age rating: 4+
- Requires: iOS 12.0 · 31 MB
- Languages: American English
- Released: 2010-07-04
- Data updated: 2026-08-07
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/dtools/id375703586/reviews.md

## What is D'Tools?

Newly updated to support the latest iPhones and iOS 12, D'Tools (formerly Guitar Tools) is the ultimate hand-held utility kit for guitar players of any style or skill level, brought to you by D'Addario & Company, Inc., the world's largest designer, manufacturer and distributor of musical instrument accessories. Enjoy the full functionality of the Chordmaster and Scale Wizard apps, the core features of ProTune and ProTempo. Developed exclusively for iOS by the minds at Audiofile Engineering, D'Tools packs a wealth of easy-to-use, professional-grade guitar utilities into one elegant application for your iPhone or iPod touch.

FEATURES:

CHORDS
Explore a library of more than 7,000 guitar chords by simply tapping and strumming the touch screen. View chords in every position up and down the guitar neck and hear each one played back in pristine audio. There's even a "lefty" mode for the oft-neglected southpaw.

CHORD FINDER
You know how to play it, but what do you call it? Select frets and finger positions to discover the proper name for your chord.

SCALES
Improve your technique by choosing from thousands of scales, modes and arpeggios to practice. Try multiple positions and alternate tunings to boost your versatility. Use "big stretches" for unique, challenging fingerings. 

TUNER
Keep your instrument in tune with a professional-grade digital tuner, powered by Audiofile Engineering's precise AETune™ pitch detection technology. Choose between strobe or needle interface and access dozens of presets.

METRONOME
Keep in time with a hyper-accurate and visually stunning digital metronome. Set tempos numerically or by tapping the touch screen. Choose from multiple sounds and time signatures.

---

D'Tools was developed by Audiofile Engineering, a leading developer of audio software for OS X and iOS.

## Key features

- Chord library with 7,000+ chords
- Scale and arpeggio explorer
- Professional-grade digital tuner
- Hyper-accurate digital metronome
- Chord finder by fret selection
- Lefty mode for chords

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Buzz Feiten Tuning System | $19.99 | one-time |


## What do users think of D'Tools?

Overall sentiment: mixed

**Pros**

- 🎸 Comprehensive all-in-one guitar tool (tuner, metronome, chord finder, scales)
- 👍 User-friendly and intuitive interface
- 💰 Free or affordable pricing
- 🎯 Accurate tuner (when working properly)
- 📚 Extensive chord and scale library
- 🎵 Reliable metronome functionality
- ⭐ No hidden subscriptions or in-app purchases (historically)
- 🔧 Useful chord finder feature
- 📖 Great reference tool for beginners learning chord positions

**Cons**

- 🐛 Frequent app crashes, especially with chord finder
- 🔊 Audio/sound issues after app closure or phone reboot
- 📱 Microphone access problems on newer iOS versions
- 🎵 Tuner accuracy issues (reads sharp or flat)
- ⚠️ Poor app support and unresponsive developers
- 🔄 Problematic updates that break existing functionality
- 🎯 Chord finder fails to recognize basic chords
- 🔌 Metronome stops when app is closed
- 💳 Unexpected repurchase requirements after updates
- 🖼️ Outdated or poor UI design in newer versions
- ⏱️ Long periods without updates or maintenance

**Commonly reported bugs**

- Chord finder crashes app repeatedly
- Tuner stops working after iOS updates
- Microphone access not granted or requested properly
- Audio/sound stops working after app closure
- Metronome has no sound intermittently
- App crashes when accessing 'Find Stores' or 'Find Teachers' features
- Chord finder displays 'no chord' for valid chords
- Tuner reads notes sharp or flat (off by semitones)
- App crashes after receiving phone calls
- Chord finder cannot recognize bar chords
- Cannot select open strings in chord finder
- App requires internet connection to function
- Incompatibility with iOS 7, 8, 11, and 12.5.7
- Tuner frequency range too limited (doesn't go below A1)

**Most requested features**

- Mute button for metronome
- Bluetooth audio output for metronome
- Dark mode/dark background for tuner visibility
- Ability to change tuning in chord dictionary
- Auto-play feature for continuous chord/scale playback
- Poly-rhythm metronome
- 3 notes per string scale display option
- Bass-specific scale options
- Ability to play pitch reference tone (440Hz, etc.)
- Support for alternate tunings
- Background metronome playback during multitasking
- Restore previous purchases button
- Microphone access request on app launch

## Recent user reviews (10 of 150)

All indexed reviews: https://appshunter.io/ios/app/dtools/id375703586/reviews.md

### 3/5 — Wants to charge me again???

*2026-01-01, version 2.1.1*

This is app does a decent job in all its functions.  But with the new update it’s requiring me to repurchase the upgrade that includes Buzz Feinten.  And there is not “restore previous purchase” button.

### 5/5 — Excellent

*2025-11-15, version 2.1.1*

Great, easy to use tuner and easy to access metronome. I use the tuner more than my Peterson.

### 5/5 — As of 2025

*2025-11-13, version 2.1.1*

I have used this app reliably for over a decade now. It is a no muss, no fuss, tuner / metronome / chord library. 

No hidden in app purchases or subscriptions. Highly recommend.

### 5/5 — Great app!

*2025-03-03, version 2.1.1*

I have had no problems with this app so far. I am also a member of D’addario’s players circle, and I was so excited to see they made an app that I could use with guitar.

### 5/5 — Awesome!

*2024-10-26, version 2.1.1*

This is a great app. It works well and is loaded with everything you need to help get in tune, practice and play. Thank you!!

### 5/5 — Well designed tuner app

*2024-10-14, version 2.1.1*

Fast responses.
Variety of GUI choices.
A=442 set-up is for free.
Design is superior than most other tuner apps. 

Wish it had sweetener features, but still a five star without it.

### 1/5 — Great app, needs mute button

*2024-04-11, version 2.1.1*

Very pleased with this free app. Really wish it had a mute button for the metronome so I can hear it and then mute it while playing instead of having to use the volume button. Thanks!

Now it doesn’t work on iOS 12.5.7

### 5/5 — Actualización!

*2024-02-08, version 2.1.1*

Por fin! Actualizaron la app y ahora funciona a la perfección… y mejor aun: GRATIS!

### 3/5 — era un…..excelente programa para guitarristas!!

*2024-02-02, version 2.1.1*

Deberian actualizarlo y darle soporte……la reseña que hice hace años era excelente pero ya no lo es mas……… hace mas de 10 años: Este es una de las aplicacines por las que queria un ipod touch 4 g , funciona a la perfecccion, muchisimas posiciones de acordes, aparte puede detectarte alguno que no sepas como se llama, las escalas son muy buenas , el afinador es impecable, el metronomo siempre es util, en fin es un programa que vale mucho la pena y el precio es casi de risa, es una aplicacion que todos deberias de tener lo recomiendo ampliamente.

### 2/5 — Probably just another abandoned app

*2022-07-13, version 2.0.4*

App offers a few functions, which might be very nice if they were usable. Maybe it just doesn't work on my device, hard to tell. 

When you run the app, there is a choice of functionality. You can select e. g. chords, but there is only E major and its inversions, no possibility to change chord, no possibility to get back to other parts of application.

## Frequently asked questions about D'Tools

### What does D'Tools do?

D'Tools is a hand-held utility kit designed for guitar players. It offers a comprehensive suite of tools including a vast chord library, a scale and arpeggio explorer, a professional-grade digital tuner, and a hyper-accurate metronome to assist with practice and musical exploration.

### What are the main features of D'Tools?

Key features include a library of over 7,000 guitar chords with audio playback, a chord finder to identify chords by finger position, thousands of scales and arpeggios for practice, a precise digital tuner with strobe or needle interface, and a visually stunning metronome with tap tempo functionality.

### How much does D'Tools cost?

The application is available for free, but it offers in-app purchases. This means you can download and use the core functionalities without immediate cost, with options to unlock additional features or content through purchases.

### What devices is D'Tools compatible with?

D'Tools is developed exclusively for iOS devices, including iPhones and iPod touches. It has been updated to support the latest iPhones and iOS 12, ensuring compatibility with modern Apple mobile hardware and software.

### Who would benefit from using D'Tools?

Guitar players of any style or skill level can benefit from D'Tools. It's ideal for beginners learning chords and scales, intermediate players looking to expand their repertoire, and advanced musicians needing reliable tuning and timing tools.

## Version history (last 5 releases)

### 2.1.1 — 2024-02-01

Improve stability and expand supported notes in Tuner to the bass range.

### 2.1.0 — 2023-07-10

Improve overall stability as well as the display of Scales.

### 2.0.4 — 2019-04-26

Updates to support latest iPhone models and iOS 12

### 2.0.3 — 2015-09-11

D'Tools 2.0.3 resolves an issue that caused muted strings to result in 'No Chord' when using the Chord Finder.

### 2.0.2 — 2015-07-29

D'Tools 2.0.2 resolves an issue that prevented the app from launching when no internet connection was available.

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## More apps by D'Addario & Company, Inc.

- [D'Chords](https://appshunter.io/ios/app/dchords/id308730617)
- [Humiditrak](https://appshunter.io/ios/app/humiditrak/id1079088449)

All apps by D'Addario & Company, Inc.: https://appshunter.io/developer/308730620

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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 2026-08-07.*