# ChordUp — Your pocket chord instrument > Instant chord instrument and MIDI controller for musicians. (iPhone/iPad app by Dmitrii Klochkov.) - Source: https://appshunter.io/ios/app/chordup/id1058553903 (this page in markdown: same URL + `.md`) - Developer: [Dmitrii Klochkov](https://appshunter.io/developer/1058553902) - Category: Music, Entertainment - Price: $5.99 - Rating: 4.40/5 from 41 App Store ratings · 35 written reviews indexed - Age rating: 4+ - Requires: iOS 15.6 · 30 MB - Languages: American English - Released: 2015-12-03 - Data updated: 2026-09-01 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/chordup/id1058553903/reviews.md ## What is ChordUp? ChordUp is a musical instrument and MIDI controller that allows you to play almost any common chord instantly. No need to configure presets for each song. Just grab ChordUp and start playing. SELECT CHORDS WITH A SINGLE TOUCH Unique chord selector allows you to play any available chord instantly. You don't need to make any pre-configurations or presets. Just tap on the key button and slide your finger to the required chord type. With a little practice you will be able to select any chord in a fraction of a second. PLAY FULL CHORDS, SINGLE NOTES OR STRUM Three playing surfaces allows you to easily play any rhythm pattern: full chords, bass and chord, strumming or arpeggios. CONTROL OTHER APPS ON THE SAME DEVICE You can use ChordUp to control your favourite soft or hard synthesizer through Core MIDI connection or though Audiobus 3 MIDI ports. CONTROL APPS ON ANOTHER IOS DEVICE OR YOUR MAC ChordUp can send MIDI notes to another iOS device through a Bluetooth MIDI connection. If you want to control an App running on your Mac you can connect through Bluetooth, Wi-Fi or USB. FEATURES • 108 available chords (9 chord types for each of the 12 notes). • 10 embedded instruments: Acoustic Piano, Electric Piano, Guitar, Organ, Accordion, Vibraphone, Strings, 3 synth sounds. • 12 pads surface (for piano like parts) • 6 strings surface (for guitar strumming, power chords and arpeggios) • Expression pad surface (allows to play full chords and control an expression parameter at the same time) • Smart sustain. With the sustain enabled, when you switch chords, only the notes of the current chord that don't belong to the next chord are muted. • Octave transposition. • Chord locking. You can lock one chord type for a chord button. • Buttons size adjustment on iPad. • CoreMIDI support. • Audiobus support (Audio sender port, MIDI sender port) ## Key features - Instant chord selection with single touch - Play full chords, single notes, or strum - Control other music apps via MIDI - 108 available chords - 10 embedded instruments - Smart sustain and chord locking ## Recent user reviews (10 of 35) All indexed reviews: https://appshunter.io/ios/app/chordup/id1058553903/reviews.md ### 5/5 — Set Global Scale? *2025-05-09, version 1.4.2* This would be a killer feature, set eg D Major, oder F Minor? Thank you! ### 4/5 — Enjoying it. Mostly *2025-04-04, version 1.4.2* I like the simplicity of controls and how easy is it experiment. I want to be able to choose a key that would change the chords (reorder and set to what makes sense in a particular key). So instead of dm etc I could see 1, 3 etc. “Contact support” in the app seems to be broken ### 5/5 — ChordUp Simply one the best control out here *2025-03-30, version 1.4.2* This controller makes making music fun and enjoyable The developer has worked hard on this masterpiece ### 5/5 — ChordUp -Play Chords App *2024-06-22, version 1.4.1* Friend, What an incredible app! i'm having a blast with it. I'm always looking for some new interesting instrument thats simple, but fun.. its is pure genius in its approach, ease of use. Absolutely brilliant! I love the fact you have three different "types" of instruments included, Pad, String, and whatever that other one was, all cool. What really makes this app shine is the MIDI out, which I effortlessly send into synth apps, etc (Im relatively new to MIDI, so u made it real easy for the user to make a midi connection). Im having the most fun with sending the midi out to Korg Module and also to the Pure Synthesizer app, select a dreamy layered synth, set your app to sustain the notes and WOW! I thought I was in heaven hearing the angels playing an arpeggiated synth guitar. I was going to wait till Black Friday to see if it went on sale, I got apps mixed up and ended up paying full price. I'm not the least bit dissapointed, Son, you deserve every penny for such a well developed, well conceived app. I donr mind paying top dollar for stuff that works. Blessings! Rob "The Watchman" ### 5/5 — just wow!!!🙌🏼 🤩 *2023-08-25, version 1.4.1* what a great app to experiment and make new music!!! Thank you!! Kudos to the app developers!👍🏼👍🏼👍🏼👍🏼 ### 5/5 — Sweet but *2023-04-09, version 1.4.1* Found a bug: C and E chords in pad mode sound the same in the third row ### 5/5 — ChordUp -Play Chords App *2022-11-22, version 1.4.1* Friend, What an incredible app! i'm having a blast with it. I'm always looking for some new interesting instrument thats simple, but fun.. its is pure genius in its approach, ease of use. Absolutely brilliant! I love the fact you have three different "types" of instruments included, Pad, String, and whatever that other one was, all cool. What really makes this app shine is the MIDI out, which I effortlessly send into synth apps, etc (Im relatively new to MIDI, so u made it real easy for the user to make a midi connection). Im having the most fun with sending the midi out to Korg Module and also to the Pure Synthesizer app, select a dreamy layered synth, set your app to sustain the notes and WOW! I thought I was in heaven hearing the angels playing an arpeggiated synth guitar. I was going to wait till Black Friday to see if it went on sale, I got apps mixed up and ended up paying full price. I'm not the least bit dissapointed, Son, you deserve every penny for such a well developed, well conceived app. I donr mind paying top dollar for stuff that works. Blessings! Rob "The Watchman" ### 3/5 — Basic function of saving presets missing by design *2022-08-03, version 1.4.1* I agree that it is very easy to change chord qualities but if you play different songs chances are that it will be different for the next. Doesn’t make musical sense to have to change chord qualities every time you play a new song. No Auv3 or you would be able to work around in something like AUM. There is IAA but that has loading issues. It will not save different song settings so not a work around but it does give more midi routings. You are stuck with the note order and even though you song doesn’t have some of the chords. Chord boxes are too small to play without looking at the screen. I want a refund but maybe the developer will update so I look at it as funding development. Hope this app is not abandoned like so many other similar apps. Looks like the reviews are phones as even when filtered by most critical they are 5 stars. I doubt my review will get published. ### 5/5 — Amazing! One request… *2021-06-16, version 1.4.1* This app is great fun! I’m loving the ability to strum my various synth apps with midi out! It’s so fun to use if you treat it like a live instrument. My one request for the dev would be to add Haptic Touch for the newer iPhones. The app C. ARP does this very well, and kind of plays the same as the “Expression Performance Mode” in ChordUp but unfortunately that app, although great in its own right, doesn’t have midi out. It seems kind of trivial, but there’s something about having that extra dimension that really makes you feel like you’re playing an instrument. It would make this already incredible app that much more amazing to me! ### 5/5 — Fantastic! But... *2020-09-11, version 1.4.1* Hello Dmitri, I love this app! The biggest obstacle is it is not AUv3 or even split screen and no MIDI OUT. Might we see that as an update? Thank you! ## Frequently asked questions about ChordUp ### What does ChordUp do? ChordUp is a musical instrument and MIDI controller designed to let you play almost any common chord instantly. It features a unique chord selector for quick access and multiple playing surfaces for various musical expressions like full chords, single notes, and strumming. ### How does the chord selection work? The app's unique chord selector allows you to play any available chord instantly without pre-configuration. You simply tap a key button and slide your finger to the desired chord type, enabling rapid chord changes with practice. ### Can I use ChordUp to control other music apps? Yes, ChordUp can control other soft or hard synthesizers and music applications. It supports Core MIDI connection and Audiobus 3 MIDI ports for controlling apps on the same device, and can send MIDI notes to other iOS devices or Macs via Bluetooth, Wi-Fi, or USB. ### What instruments are included? ChordUp comes with 10 embedded instruments, including Acoustic Piano, Electric Piano, Guitar, Organ, Accordion, Vibraphone, Strings, and 3 synth sounds. It also offers 108 available chords, with 9 chord types for each of the 12 notes. ### Is ChordUp compatible with my device? ChordUp is an application for iOS devices. It supports Core MIDI and Audiobus 3, and can connect to other iOS devices or Macs via Bluetooth, Wi-Fi, or USB, making it versatile for various setups. ## Version history (last 5 releases) ### 1.4.2 — 2025-02-17 - Fix menu layout issues - Add video previews ### 1.4.1 — 2019-12-30 - Update app icon - Fix "rate app" dialog ### 1.4 — 2019-12-20 - Bluetooth MIDI support added - Adjust UI layout for iPhoneX screen - Refresh UI - Update App icon and App Store screenshots - Fixed the issue when touches are delayed when near the screen edges ### 1.3.0 — 2017-08-01 AUDIOBUS 3 SUPPORT! ChordUp now provides Audiobus audio sender port and MIDI sender port. CONTROL BUTTONS LAYOUT OPTIMIZED Control buttons are now placed only by the corners of chord selector grid, minimising the chance of accidentally tapping on them when selecting a chord. MUTE GESTURE SETTINGS ADDED You can now enable and disable mute gesture and adjust the delay parameter for it. OTHER IMPROVEMENTS -Menu remade -UI polished -Minor bug fixes ### 1.2.2 — 2016-03-09 - fix: note off MIDI command is not recognized by some synthesizer apps. ## Apps similar to ChordUp | App | Rating | Price | Category | | --- | --- | --- | --- | | [Accordion Vintage](https://appshunter.io/ios/app/accordion-vintage/id1510723507) | 4.6 (19) | $6.99 | Music | | [StepPolyArp](https://appshunter.io/ios/app/steppolyarp/id1361313588) | 4.8 (48) | $19.99 | Music | | [ChordMaps2](https://appshunter.io/ios/app/chordmaps2/id1098330720) | 4.2 (25) | $9.99 | Music | | [Steel Guitar PRO](https://appshunter.io/ios/app/steel-guitar-pro/id1619441235) | 4.5 (67) | $9.99 | Music | | [Chordy 2](https://appshunter.io/ios/app/chordy-2/id1243252791) | 5.0 (2) | $3.99 | Music | | [ScaleBud - AUv3 MIDI Keyboard](https://appshunter.io/ios/app/scalebud-auv3-midi-keyboard/id1409125865) | 4.3 (31) | $4.99 | Music | ## More apps by Dmitrii Klochkov - [ChordFlow](https://appshunter.io/ios/app/chordflow/id1219789464) - [BounceMeter](https://appshunter.io/ios/app/bouncemeter/id1372655869) - [Tune Maker - Compose Music](https://appshunter.io/ios/app/tune-maker-compose-music/id1489705836) - [Absolute－Develop Perfect Pitch](https://appshunter.io/ios/app/absolutedevelop-perfect-pitch/id1497780766) All apps by Dmitrii Klochkov: https://appshunter.io/developer/1058553902 --- *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 2026-09-01.*