Every word timed and animated, lyric videos synced word by word, all made on your phone.
Open SubTitan AI and choose a clip from your gallery, record one, or pick an MP3, M4A, WAV, AAC or FLAC song.
Before any big download it listens to a few parts of the opening, just the vocals for songs, so a music intro can't fool it.
AI writes word-by-word captions. Choose one of 24 styles, check the text and export an MP4 video or an SRT subtitle file.
SubTitan AI is an Android app that writes word-by-word captions and subtitles for your videos with on-device speech recognition in 99 languages. It styles them with 24 animated caption styles, turns songs into synced lyric videos, and exports MP4 videos or SRT, VTT, ASS, LRC and TXT subtitle files.
Speech recognition runs on your phone and understands 99 languages, plus Cantonese. It detects the language for you; when it is a close call, the likely languages appear as one-tap choices.
SubTitan AI is an Android app that adds auto captions and subtitles to videos. Its on-device AI writes word-by-word captions in 99 languages; you pick one of 24 animated styles and export an MP4 video or SRT, VTT, ASS, LRC and TXT subtitle files.
Open SubTitan AI, pick a video from your gallery or record one, and let the app detect the language. The AI writes word-by-word captions. Choose a style, check the text, then export the video with burned-in captions or save an SRT file.
Yes. After a one-time download of the speech model, speech recognition runs on your phone without an internet connection. Caption fonts and translation packs are also downloaded once, the first time you need them.
No. Your videos, audio and captions are processed on your device and are never uploaded to us, and there is no account. Google's ML Kit, which the app uses for translation, sends Google technical diagnostics.
Speech recognition understands 99 languages, plus Cantonese, and detects the language for you. Sinhala has its own trained model that writes Sinhala script, and languages such as Hindi, Tamil and Thai keep their own script.
Yes. Pick an MP3, M4A, WAV, AAC or FLAC song and the AI writes the lyrics, or paste your own and every word syncs to the vocals. The lines appear over drawn scenes, gradients or your own photo.
You can export an MP4 video with burned-in captions, or subtitle files in SRT, VTT, ASS, LRC and TXT. You can also import SRT, VTT, ASS, LRC or plain-text files and restyle them.
Yes. Long videos are captioned in parts and resume where they left off. The work keeps going in the background with a progress notification, so you can use other apps in the meantime.
SubTitan AI runs on Android 7.0 and later, on phones and tablets. Export up to 4K at 60 fps depends on the device and needs Pro.
SubTitan AI is on Google Play for Android 7.0 and later.
Effective date: 14 October 2026. Published by Chamela Aluthgedara, Sri Lanka. Questions: apps.support@ailivex.com
Summary
SubTitan AI (the "App") is developed by Chamela Aluthgedara ("we", "us", "our"), based in Sri Lanka, and published on Google Play and, when available, on the Apple App Store. We are responsible for the personal data described in this policy and act as its data controller.
Contact: apps.support@ailivex.com.
This policy covers the App and this web page. Services run by others, such as Google Play, the App Store, Google, Hugging Face and your email provider, have their own privacy policies, which we link to below.
The App works on your device. The following is processed and stored only on your device. It is not sent to us or to anyone else:
The App's AI features (speech recognition, language detection and translation) and its video rendering run entirely on your device.
This information stays in the App's private storage until you delete it, clear the App's data or uninstall the App. On Android, the App excludes its data from cloud backup and from device-to-device transfer. On iOS, the App's files may be included in your iCloud or computer backups, depending on your device settings.
The only personal data we receive is what you send us when you contact us, for example through Settings › Send feedback, which opens your email app.
We do not collect anything else. The App has no analytics, advertising, crash-reporting or tracking tools of our own. It does not use advertising identifiers, and it does not access your location or contacts.
Google ML Kit (on-device translation). The App uses Google ML Kit to download translation language packs and to translate text on your device. The text you translate stays on your device. For diagnostics and usage analytics, ML Kit sends Google technical information:
Google uses Firebase Installations and Firebase Remote Config for this. Google encrypts this information in transit and states that ML Kit does not transfer it to third parties. See Google's ML Kit data disclosure, the ML Kit Terms and Google's Privacy Policy.
Model and font downloads. Some features download files the first time they are needed:
Like any web request, the service delivering a file receives standard connection data: your IP address, the requested file, the time, and basic technical details such as your operating system and app version. We do not receive this data. See the Hugging Face Privacy Policy and Google's Privacy Policy. The App checks every downloaded file before use.
Google Play and the Apple App Store. The stores handle downloads, payments, subscriptions, rating prompts and, on Android, update checks. They process your account and payment information as independent controllers, under Google's and Apple's privacy policies. The App receives purchase confirmations from the store, such as the product, a purchase token or transaction ID, and the subscription's renewal or expiry status. It checks them on your device to unlock Pro. These confirmations are not sent to us.
Links and sharing. When you open a link, send an email or use the system share sheet, the app or website you choose takes over. Its own policy applies from that point.
We do not sell or rent personal data, and we do not share it for targeted or cross-context behavioural advertising. We disclose the support messages described in section 4 only:
Our email provider and the third-party services above may process data in countries other than yours, including the United States. Where data protection law requires it, these providers protect transfers with recognised safeguards, such as adequacy decisions or standard contractual clauses.
The App downloads only over encrypted (HTTPS) connections and verifies downloaded files before use. It checks purchase confirmations on your device and keeps your subscription status in the system's secure storage. No method of transmission or storage is completely secure, but we work to protect the information we handle.
The App is intended only for adults aged 18 or over, or the age of majority where they live if that is higher. It is not directed to children or minors, and we do not knowingly collect personal data from anyone under 18. If you believe a minor has sent us personal data, email us and we will delete it.
You control the information on your device. You can:
For the support messages we hold, you may ask us to access, correct, delete or export your data, to restrict or object to our use of it, or to withdraw consent. Depending on where you live, you have these rights under:
Email apps.support@ailivex.com from the address you used to contact us. We will answer within 30 days, or sooner if the law requires. You may also complain to your local data protection authority.
For data held by Google, Apple or Hugging Face, contact them directly. To cancel a subscription, use your Google Play or App Store account settings.
We do not track you across apps or websites, so there is nothing to change when your browser or device sends these signals.
We may update this policy. When we do, we will publish the new version on this page with a new effective date. Where the law requires, we will also give you additional notice.
Chamela Aluthgedara, Sri Lanka · apps.support@ailivex.com
Please read these terms carefully. They include a disclaimer of warranties, a limitation of our liability, and rules for resolving disputes (sections 14 to 17).
These Terms of Use ("Terms") are a legal agreement between you and Chamela Aluthgedara ("we", "us", "our") about the SubTitan AI app (the "App"). By accepting these Terms in the App, or by downloading, installing or using the App, you agree to these Terms. Our Privacy Policy explains how we handle information; please read it too. If you do not agree, do not use the App.
You must be at least 18 years old, or the age of majority where you live if that is higher, to use the App. The App may ask you to confirm your age. By confirming it, or by using the App, you represent that you meet this requirement and that you have the legal capacity to accept these Terms. The App is not intended for minors.
If you got the App from Google Play, the Google Play Terms of Service also apply. If you got it from the Apple App Store, Apple's Licensed Application End User License Agreement also applies, and it takes precedence where it conflicts with these Terms for your use on Apple devices.
Google and Apple are not parties to these Terms. They are not responsible for the App, its content, maintenance, support or any claims about it. Apple and its subsidiaries are third-party beneficiaries of these Terms for your use of the App on Apple devices and may enforce them.
Subject to these Terms, we give you a personal, limited, non-exclusive, non-transferable, revocable licence to install and use the App on devices you own or control, for your own lawful purposes. We reserve all rights not expressly granted.
The App, including its software, design, text, graphics and trademarks, belongs to us or our licensors and is protected by intellectual property laws. The App includes open-source software and models under their own licences, among them OpenAI Whisper (MIT) and SinhaSpeech (Apache 2.0). Those licences, listed in Settings › Open-source licenses, govern those components.
You keep all rights to the videos, audio, images and text you use or create with the App ("Your Content"). Your Content is processed on your device. We do not receive it and claim no rights to it.
You are solely responsible for Your Content: for having every right, licence and consent needed to record, process, caption, translate and publish it, and for how you use the results. Keep your own backups. Deleting a project or uninstalling the App deletes its data permanently.
You agree not to use the App to:
Captions, transcripts, language detection and translations are produced automatically and may contain errors, omissions or mistranslations, including in names, numbers and meaning. They are not professional advice. They are not certified for any legal, medical, safety, broadcast or accessibility-compliance purpose.
You are responsible for reviewing and correcting the output before you rely on it or publish it.
Some features download speech models, translation packs and fonts from third parties: Hugging Face, Google Drive, Google ML Kit and Google Fonts. Their own terms apply, including the ML Kit Terms of Service. We do not control these services and are not responsible for their availability, content or practices.
We may update, change, suspend or discontinue the App or any feature at any time, and some updates may be required to keep using it. We do not guarantee that the App will always be available, error-free, secure, or compatible with every device or operating system.
If you send us ideas or suggestions, we may use them freely, without any obligation or payment to you.
You may stop using the App at any time by uninstalling it. We may suspend or end your licence if you breach these Terms. When the licence ends, you must stop using the App. Sections 5 to 8 and 14 to 19 survive termination.
TO THE FULLEST EXTENT PERMITTED BY LAW, THE APP AND ALL ITS FEATURES, OUTPUT AND DOWNLOADS ARE PROVIDED "AS IS" AND "AS AVAILABLE", WITHOUT WARRANTIES OF ANY KIND, WHETHER EXPRESS, IMPLIED OR STATUTORY. THIS INCLUDES ANY WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, ACCURACY, NON-INFRINGEMENT AND UNINTERRUPTED OR ERROR-FREE OPERATION.
TO THE FULLEST EXTENT PERMITTED BY LAW, WE ARE NOT LIABLE FOR ANY INDIRECT, INCIDENTAL, SPECIAL, CONSEQUENTIAL, EXEMPLARY OR PUNITIVE DAMAGES. WE ARE ALSO NOT LIABLE FOR ANY LOSS OF DATA, CONTENT, PROFITS, REVENUE, GOODWILL OR BUSINESS OPPORTUNITY ARISING FROM OR RELATED TO THE APP OR THESE TERMS, EVEN IF WE WERE TOLD OF THE POSSIBILITY. OUR TOTAL LIABILITY FOR ALL CLAIMS RELATED TO THE APP IS LIMITED TO THE GREATER OF (A) THE AMOUNT YOU PAID FOR PRO IN THE 12 MONTHS BEFORE THE EVENT GIVING RISE TO THE CLAIM AND (B) USD 10.
Nothing in these Terms excludes or limits liability that cannot be excluded or limited by law. That includes liability for death or personal injury caused by negligence, liability for fraud, and the rights you have as a consumer under mandatory law.
To the extent permitted by law, you agree to indemnify and hold us harmless from any claims, damages, losses and expenses, including reasonable legal fees, arising from Your Content, your misuse of the App, or your breach of these Terms or of anyone else's rights.
These Terms are governed by the laws of Sri Lanka, without regard to its conflict-of-law rules. Before bringing any claim, please email us so we can try to resolve the issue informally within 30 days.
The courts of Sri Lanka have exclusive jurisdiction over any dispute about the App or these Terms. If you are a consumer, however, you may also bring claims in the courts where you live, and you keep the protection of the mandatory laws of your country.
To the extent permitted by law, disputes are resolved individually and not as part of a class or representative action, and any claim must be brought within one year after it arises.
You confirm that you are not located in a country subject to comprehensive embargoes, and that you are not on any government list of prohibited or restricted parties. You agree to use the App in compliance with all applicable export and sanctions laws.
We may update these Terms. The new version takes effect when it is published on this page with a new effective date. Where the law requires, we will also give you additional notice. We may also ask you to accept the updated Terms in the App. If you keep using the App after the change, you accept the updated Terms.
Chamela Aluthgedara, Sri Lanka · apps.support@ailivex.com
