Dublio support

Dublio’s own screens are in 12 languages: English, Arabic, Chinese (Simplified), French, German, Italian, Japanese, Korean, Portuguese (Brazil), Russian, Spanish and Turkish. It follows your phone’s language and uses English when your phone’s language is not one of these. To choose another, go to Settings → Language.

This is separate from the languages of your videos, which can be subtitled and dubbed in many more. Which ones depends on the options you choose and on the voices on your phone.

Everything is made on your phone: the speech is written down, translated and spoken again. That takes a while, so the app does it ahead of playback. It works through the video part by part, starting with a short first part. As soon as that is ready you can start watching; the player waits at the end of the ready part and goes on by itself when the next part is done.

You can line up several videos; they are prepared one after another.

It depends on your phone, the length of the video and what you chose. Subtitles alone are quicker than a dub, and a dub with a voice for each speaker takes longer than one voice. For writing down the speech, Fast is the quickest, Balanced suits most videos, and Most accurate is the slowest, about five times slower than Fast. The app shows an estimate of the time left while it works.

On Android, yes: the preparation goes on in the background with a notification showing its progress. Some phones slow background work down to save battery; if a preparation is much slower with the screen off, turn on Full speed in the background in the app’s settings and allow it when Android asks.

On iPhone, with iOS 26 or newer a preparation continues in the background and the system shows its progress. On earlier versions iOS pauses it soon after you leave the app, and it continues when you come back.

In both cases, a preparation that was paused, or stopped because the phone ended the app, continues where it stopped.

Some languages and options need files that are too large to come with the app. Before the first preparation that needs one, the app shows what will be downloaded. Each file is downloaded once and kept on the phone for later preparations, and the preparation starts by itself when the download is done. Wi-Fi is best.

Choose the subtitle file (.srt) together with the video. The app uses its lines instead of writing down the speech, which is much quicker, and can still translate and dub them. A voice for each speaker needs the subtitle timings to match the video; if they do not, every line is spoken with one voice.

You can also open a subtitle file on its own, without a video, to translate it or to turn it into speech.

Each option for writing down the speech knows a different set of languages. If the one you chose does not know the language, the app tells you and uses Fast, which knows the most. You can also prepare the video from a subtitle file.

The dub is spoken with the voices on your phone, so a language can be dubbed only when the phone has a voice for it. The app shows the steps to add one:

• Android: the app opens the phone’s text-to-speech settings, where you download the voice data for that language.
• iPhone: Settings → Accessibility → Spoken Content → Voices, choose the language and download a voice.

When the voice is on the phone, come back to the app and the language can be chosen. Subtitles can be made in every language the translation supports, voice or not.

Yes. When you choose a voice for each speaker, Dublio can make each voice sound like that speaker’s own, using a few short clips of that speaker taken from the same video. It all happens on your phone, and the clips stay with that preparation. Do this only with voices you are allowed to use; see the terms.

Speakers are told apart automatically, from how their voices sound. Overlapping speech, loud music, very short lines and similar voices can confuse it. If it happens often in a video, prepare it with one voice for all speakers instead.

During each dubbed line the app turns down only the original speech, so music and sound effects stay at their own level. You can change how far the original speech and the music and effects are turned down in the player’s options.

Yes. Going back from the player shrinks the video to a mini player at the bottom of the app. Leaving the app while a video plays moves it to the system’s floating picture-in-picture window, on Android and on iPhone.

Yes. In the player’s options, The video’s own subtitles lists the subtitles that come inside the video file. Turn them off, or pick another language; the app remembers the language you picked for the next video.

• Video (MP4) with the dub and the subtitles. The subtitles can be drawn into the picture, so every player shows them, or added as a separate track, which is much faster and shows in players that can switch subtitles on and off, such as VLC.
• Subtitle file (SRT), which opens in almost any player.
• Audio (M4A), with the dub alone or over the turned-down original sound.

When an export is done, share it, or save it to your phone in the place you choose. Share, next to Export, does both steps at once. An exported video with a dub includes a short line saying that the voice-over was made by AI, where the video has a quiet moment for it.

It was probably exported with the subtitles as a separate track, which some players do not show. Turn subtitles on in your player, or export again with the subtitles drawn into the picture.

A limited number of preparations each calendar month, for videos or subtitle files up to a set length. A preparation counts when it starts, also if it fails or you cancel it; trying it again or resuming it does not count again. Starting a free preparation needs an internet connection. Exporting is free. Settings shows the current limits, how many you have used this month and when they renew. The limits can change. The count is kept on your phone. Pro removes the limits.

On the free plan, the app may ask you to watch a short video ad before a free preparation starts. That is how the free plan is paid for. The preparation starts once the ad has played to the end; if you close the ad early, it does not start. If no ad is available, the preparation starts without one. Where it is offered, you can buy that single preparation instead, also when this month’s free ones are used up. Pro subscribers see no ads.

On the free plan, the player may show a full-screen ad break from time to time. The breaks are marked on the seek bar. The video and the dub pause for the ad and go on when it closes. There are no breaks in the mini player or the picture-in-picture window, and none with Pro.

In your store account, not in the app: Google Play → Payments & subscriptions → Subscriptions, or on iPhone Settings → your name → Subscriptions. Deleting the app does not cancel a subscription. Refunds are handled by the store you purchased from.

Your subscription belongs to your Google or Apple account, not to the app. Sign in to the same account on the new phone: on Android the app finds the subscription by itself, and on iPhone use Restore purchases in the app’s settings.

On iPhone you can change tracking permission at any time under Settings → Privacy & Security → Tracking. Where Google’s consent form applies, your choice is kept in the app’s own storage: clearing the app’s data or reinstalling the app brings the form back. Subscribing to Pro removes ads entirely.

No. Your videos, their subtitles and the voices Dublio makes are processed on your phone and stay there. The privacy policy lists everything the app does send, such as language file downloads and anonymous usage statistics.

To download the language files you need, the first time you need them, and on the free plan to start a preparation (the app checks the date with a server). Once started, a preparation, and watching and exporting, work offline. With Pro, preparing needs no connection at all.

Dublio includes open-source software made by others. Their notices and licences are on the open-source licenses page, which the app opens from Settings → About.

There is no account to delete, and we hold none of your videos on a server. Full instructions are on the data deletion page.