Key changer apps, and what each one is for
All four of these move a song into a new key without changing its speed. What separates them is what you do with the song once it has moved: keep it as a file, practise a part on an instrument, or sing it. The first three are built for the first two. The last column is Homeoke, which I make, so read it with that in mind. Everything in the other three comes from their own App Store listings.
 Music Transpose |
 Anytune |
 MP3 Pitch Changer |
 Homeoke |
|
|---|---|---|---|---|
| Who it is for | Changing a file's key | Musicians practising a part | Playing along in your key | Anyone who loves to sing |
| Change the key | Yes, in semitones | Yes, and 24 semitones with the Studio pack | Yes | Yes, six semitones each way |
| What it opens | Most audio and video files | Your music library, and files with the Import pack | MP3 files | Audio files on your phone |
| Works offline | Yes, it runs on the device | Their listing does not say | Their listing does not say | Yes, with the network off |
| Takes the original voice out | No | Roughly, by stereo position, with the Studio pack | No | Yes, on the phone |
| Synced lyrics as you sing | No | No, lyrics as plain text | No | Yes |
| Shows a song's vocal range | No | No | No | Yes, and it follows the key |
| Records you | No | Yes, to check your playing | No | Yes, and keeps every take |
| Change the speed | Yes | Yes, down to a twentieth | No | No |
| Saves the changed song as a file | Yes, in several formats | Yes, with the export add-on | Their listing does not say | No |
| Runs on | iPhone, iPad | iPhone, iPad, Mac, Android | iPhone, iPad | iPhone |
| Limit on free use | Shorter files until a one-time purchase | Free version works, packs add the rest | Their listing does not say | None |
Checked on 28 September 2026 against each product's App Store listing, and a "no" means the feature is not in the list the product publishes. Anytune's other platforms come from its own site, and the others were checked on the App Store only. No prices are quoted. InsTranspose comes up in the same searches, but it moves written notes between instruments on a chart and never touches a recording, so it is not in the table. Features move: if the decision matters, check theirs rather than trusting a table on somebody else's site. Each name and icon belongs to its owner and is used to say which product is being discussed.
If you want a file in a new key, you want less than Homeoke
If the job is a backing track moved down two semitones to take to a rehearsal or a gig, Music Transpose does exactly that, one purchase unlocks it for good, and it hands you back a file. Homeoke cannot: nothing leaves it as a file, it does not change the speed, it stops at six semitones each way, and it is on the iPhone only. If you play an instrument and want a solo slowed right down and looped, Anytune has been built for that for over a decade, and the first two columns are the ones to read.
What Homeoke does
The key you want is not a number you can pick in advance. It depends on your voice and on where the song sits. Homeoke reads the range of the original vocal off the song on its first play, and shows that range moving as you change the key, so you can put it inside your own range before you sing a note of it. The original voice comes out on the phone, the synced lyrics run in front of you, and every take is kept, so you can hear whether the new key actually worked.
Nothing is uploaded. The one thing it needs from you is the file, and a streaming subscription is not a file. If you want other apps for singing along rather than for changing keys, Smule alternatives and Moises alternatives cover the other two questions people ask, and Anytune alternatives covers practising a song.
Sing in your own key with Homeoke
On the App Store, for any iPhone running iOS 17 or later. No account, no upload limit, and your music never leaves the phone.
Get Homeoke on the App Store