C.ARP

• Price: $9.99

Last verified 31 Jul 2026

4.3 109 ratings · App Store

1. 5/5Absolutely Genius

   In short summary, you’ll find that this app unapologetically turns your iPhone into an instrument. This isn’t some full blown DAW, nor is it just some bad excuse for a keyboard/synth app. I’ve only been using it for 10 minutes and felt compelled to write this. Within about 30 seconds of using the app, you’ll see just how genius this all is. Don’t get me wrong, Garage Band and other iOS DAWs can be fun, but sometimes they lack the simplicity to just jam. Then other apps can be easy, but too simple and too canned. This app just has some amazing, perfect balance to it where it doesn’t try to be anything that it’s not, while still having options and controls that largely improve quality of life. Completely worth $8, in fact, I might pick up an old iPhone for the sole purpose of dedicating it to this app. There’s also MIDI out (at least I assume it’s MIDI out, but even if it’s just MIDI, that’s cool too) through I don’t have a Lightning to MIDI adapter (which I assume assume must exist), perhaps something I’ll look into in the near future. If there was any reason to seriously pursue iOS MIDI, it’s this. Also, not sure if this can be used on an iPad or not (whether natively or the iPad running it as an iOS app)— that’s something I’ll also be looking into. One last comment: I did notice the app crashes if you’re attempting to use the record feature for creating a sampled voice. Though it only seems to crash if you tap the button. If you hold the button down (which you need to anyway to record it), it’ll work as intended. Just a tiny scratch that can easily buff out on an otherwise perfectly functioning machine. If the developer is reading this, all I want to say is thank you. Thank you, thank you, thank you.

   Asdf hero · 31 Jul 2026

2. 5/5SO worth it!

   I literally have never taken the time to write an app review in my life, but I had to for this. I was this 🤏 close to buying an $800 Omnichord because I just loved the sound so much. This gives you the exact same thing for LITERALLY 100X CHEAPER. Man, thank you so much for making this. <3

   jones8727 · 31 Jul 2026

3. 5/5Great for audio professionals, omnichord enthusiasts, tinkerers, and everyone in between.

   I love that classic omnichord sound, and I love how fun it is to noodle around with this app. As a music hobbyist, this has been extremely helpful in dissecting and learnjng chord progressions, following along easily with guitar/piano tabs, and writing my own music. All on the go during my daily commute. Can’t recommend enough, have also bought as a gift!

   Camiam321 · 31 Jul 2026

4. 5/5Amazing Design!!

   This is such a darling little synthesizer, I am in love with all the dreamy little sounds it makes. I thought the controls were confusing at first but after reading the tutorial and using them for a few minutes I was able to really quickly get the hang of it and it feels super intuitive now and easy to access as Im playing. The only thing I could want from this is a way to switch from seeing the standard plectrum to one where I can visually distinguish each individual “button” so I could play them individually a bit easier if I wanted, but its amazing either way :)!

   adventureApe · 31 Jul 2026

5. 5/5A Genuine Treat

   I have never in my life written a review for an app, but I felt the need to make an exception for this. I had just put a name to this instrument and wanted to try it for myself; the sound of an omnichord reminds me of my favorite childhood show Adventure Time, as it was used (I think!) in many of their iconic songs. I am very happy with this app for its accessibility, easy navigation and great sounds!! ❤️ Much love and many thanks!

   MojoBearMoon · 31 Jul 2026

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