Howli
Guided harmony singing practice for iPhone
At a glance
- Editor score4.6 / 10
- PricingFree plan
- Best forSingers learning and recording their own harmony parts
- Free planYes
- Facts checked26 Sep 2026
Where it wins
- Pitch and lyric cues guide singers through separate harmony layers
- Combines saved vocal takes into a harmony video
- Browser editor supports MIDI and MusicXML imports
Where it doesn't
- Does not generate harmony voices automatically
- Does not process live audio
- Free practice has a daily recording allowance
Our verdict on Howli
Howli is a guided harmony practice and recording app for singers who want to learn and capture their own vocal parts. Users can choose a built-in song, enter a song code, or create custom parts, then follow pitch and lyric cues as they record separate layers. Its focus is helping a singer perform each part rather than generating harmony voices automatically, so it suits learners and self-recording vocalists better than people seeking an AI arrangement tool.
The workflow connects the browser editor with the iPhone app. In a browser, users can write harmony parts and lyrics and import MIDI or MusicXML; arrangements can then be brought into the iPhone app for practice and recording. The app can use a singer’s vocal range to suggest a starting key for guided songs, and the song key can be adjusted. Saved takes are combined into a harmony video, with completed performances available to export and share. This makes Howli a focused fit for building and presenting layered vocal performances, rather than a general audio production environment.
Howli has a free plan, with a daily recording allowance for free practice; custom songs written in the iPhone app have unlimited free practice. The paid options are Howli Unlimited Monthly, Howli Unlimited Yearly, and Howli Unlimited Lifetime, each highlighting unlimited recording attempts for every song and part. Those tiers address recording limits, not automatic harmony generation. Singers who want guided cues, layered takes, and a browser-to-iPhone workflow may find the scope appropriate; those who need live processing or generated harmony voices should look elsewhere.
Howli pricing
All 3 Howli plans and prices →
Howli fact sheet
| Free plan | Yes |
|---|---|
| Paid from | Not verified |
| Key/scale detection | No |
| Maximum harmony voices | Not verified |
| Humanisation controls | No |
| Plugin formats | iPhone app and browser editor; no VST, AU or AAX plugin listed |
| Web app | Yes |
| Live processing | No |
| Harmony stem export | No |
| Deployment | Mobile, Browser extension |
| Platforms | iOS, Web |
| Support | Email, Docs |
| Built for | Solo (editorial estimate) |
| Pricing | Free plan (source) |
| Website | get-howli.com |
| Facts checked | 26 Sep 2026 |
Alternatives to Howli
- Waves HarmonyFlexible eight-voice harmonies with automatic, MIDI and graphic control for DAW workflows.4.4
- Antares Harmony EngineA DAW plugin for shaping four harmony voices with detailed note and performance controls.6.4
- Echelon Audio VOICESScale-aware, eight-voice harmony for producers working in major DAWs.6.6
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Howli is listed in our AI Harmony Generators directory. Add the badge to your site — it links back to this page.
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Reviewed by iTechGuides Editors · Editorial team · Updated Sep 2026
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