Overview

Applio handles conversion with ready-made models and adds pitch tuning, cleaning, upscaling, and batch processing for recorded audio. Live conversion uses low-latency inference for songs, streams, and calls. That range makes it useful across editing and real-time work, though its model-building tools may be more than a casual user needs.

Audio and models stay on the device unless users choose to share them, and core features require no account, telemetry, or cloud service. This gives privacy-conscious users a meaningful degree of control. The MIT license permits use, modification, and redistribution for personal, research, and commercial work, a notable advantage for creators who need commercial-use flexibility.

Key features

Conversion and model workflow

Batch processing and several recorded-audio adjustments make Applio suitable for working through multiple clips rather than only changing a single voice. Low-latency live conversion extends that workflow to calls and streams. The suite also includes model training, a voice blender, text-to-speech, and an audio analyzer to assess dataset readiness. These tools provide a wider path from preparing audio to creating a model, but local training has a substantially higher hardware bar than inference with existing models, which most modern computers can handle.

Running Applio and model safety

Google Colab, Pinokio, and Hugging Face offer cloud or one-click ways to run Applio, useful for users who do not want to set up a conventional local workflow. Models come from external sources, so users should choose trusted sources and verify downloaded files. The security guidance also asks vulnerability reporters to contact maintainers privately through GitHub; maintainers usually acknowledge reports within a few days.

Pricing

Applio costs 0.00 USD per free, billed Free forever. The single Applio plan is open source and MIT licensed, with no accounts or paywalls. There are no paid tiers that trade away features or impose separate plan limits, making it a straightforward option for users who want to try voice conversion and model tools without a subscription. Its practical cost is the hardware needed for local training, not a plan fee.

Platforms

Applio supports Linux, macOS, Windows, web, and self-hosted use. The range suits people choosing between desktop and web-based setups, while the local privacy model may matter most to those who run it on their own device.

Who it's for

Applio suits creators who want recorded and live voice conversion, custom model training, and commercial-use flexibility in one free tool. It is also a strong candidate for users who prefer to keep audio and models local and avoid accounts. If the goal is simply to make a few quick conversions without learning a broader model workflow, a more focused alternative may be a better fit.

Pros and cons

Pros: Recorded and low-latency live conversion serve both editing and calls or streams.
Pros: Training, a voice blender, text-to-speech, and dataset analysis support more than basic conversion.
Pros: MIT licensing permits commercial use, modification, and redistribution.
Pros: Core features need no account or cloud dependency, and audio stays local unless shared.
Cons: Local model training is recommended for Nvidia RTX 20-series or newer hardware.
Cons: Users must take care with external models and verify downloaded files.

Alternatives

Altered Studio is worth considering if you want a freemium option with local voice cloning and a free tier capped at 3 minutes per month of Voice Morphing, 10,000 AI Tokens, and noncommercial attribution licensing.

Kits AI may suit users who prefer a web- or API-oriented service: its free plan includes 15 conversion minutes and voice designer and blender tools, but no voice slots or download minutes.

ElevenLabs is an option for users seeking a web or API freemium service, with a free plan that includes 10,000 monthly credits and three Studio projects.

Voice Morph offers a no-signup free option with three daily conversions without ads, clips up to 30 seconds, standard voices, and WAV downloads.

Audimee may fit web users focused on royalty-free voices: its free plan includes 15 conversion minutes and 11 voices, but no custom model slots and personal-use-only downloads.

IK Multimedia ReSing is a desktop alternative for macOS and Windows; its free tier includes two voices, two instruments, and one RVC import, with no model generation.

Respeecher is another alternative to consider.

Voice-Swap is another alternative to consider.

Browse AI Voice Conversion Software, Voice Changer Software, AI Voice Changer Software, AI Song Cover Generators, and AI Voice Cloning Software for more options by category.

Verdict

Choose Applio if you want a free, MIT-licensed suite for recorded and live conversion, model creation, and local control without an account. Its main limitation is the hardware recommendation for local training; users who do not need that broader workflow, or who lack suitable hardware, should consider a more focused alternative.

	Applio	Humlo
Free plan	Yes	Yes
Free trial	No	No
Paid from	Free	Free
Open source	No	No
Platforms	Linux, macOS, self-hosted, Web, Windows	iOS, Web
Free plan	Yes	Yes
Vocal upload	—	Yes
Custom voice creation	—	Yes
Export formats	—	MP3
Commercial use	—	restricted

Applio vs Humlo

Applio

Humlo