On-device vs. online converters: where does your video go?
Online video-to-MP3 sites upload your file to someone else's server. Here is what converting on the iPhone itself changes.
What an online converter does
A website that turns video into MP3 has to receive the video first. Your file is uploaded to a server you do not control, processed there, and the result is sent back. How long the file is kept, and who can see it, depends on that service.
What on-device means
Tonify decodes the video with Apple's own audio engine and writes the MP3 with the open-source LAME encoder, both on your iPhone. The video and the audio it makes are not uploaded — which is why it works in airplane mode.
Speed and size limits
With nothing to upload, there is no queue and no waiting for a server: a six-second clip converts in well under a second. There is also no file size limit imposed by someone else; long videos need only time and free space on your phone.
What the app does send
On-device does not mean the app never uses the network. Tonify sends anonymous, technical information — what kind of job ran, whether it worked and how long it took — and verifies your subscription with the App Store. It never sends file names, links or contents. The privacy policy lists every case.
Try it on your iPhone
Tonify pulls the audio out of any video as MP3, M4A or WAV, or cuts a 30-second ringtone — converted on your phone, with no upload.
See how Tonify works →