By using Chorus you agree to these terms. They apply in addition to Apple's Licensed Application End User License Agreement, which governs the app itself.
Chorus generates AI subtitles, translations and explanations for audio you import or select from public podcast feeds, and provides recording tools for speaking practice. The app is for personal, non-commercial learning.
You can import and play any audio you like, as much as you like, without a subscription: playback happens on your own device and is never metered. AI subtitles, translation and explanation are the paid features, with a free monthly allowance of 60 minutes of AI transcription and 20,000 AI characters.
Chorus offers auto-renewing subscriptions: Basic Monthly (5 hours of AI transcription and 300,000 AI characters per month) and Pro Monthly or Pro Yearly (30 hours of AI transcription per month plus unlimited AI translation and explanation; the yearly plan is the same allowance billed once a year). AI characters cover translations, word lookups and sentence explanations.
The price shown in the app and on the App Store at the moment of purchase is the price that applies; it varies by region and currency. Payment is charged to your Apple ID at confirmation of purchase. A subscription renews automatically unless it is cancelled at least 24 hours before the end of the current period. You manage and cancel subscriptions in your App Store account settings. Allowances do not roll over and reset at the start of each calendar month.
Starting AI subtitles counts the length of that audio against your monthly transcription allowance. It counts once per account per audio file and language, per month: playing it again, reinstalling the app, or opening it on a second device does not spend it twice. If the same audio has already been transcribed for someone else, subtitles arrive in a second instead of minutes, but the allowance is still spent the same way, because what you receive is the same finished transcript. Audio longer than the allowance you have left is not transcribed part-way; the app offers the subscription options instead. Audio you have already transcribed keeps working even when the allowance is used up.
“Unlimited” applies to AI translation, word lookups and sentence explanations on Pro: no monthly character cap, because a repeated phrase is served from a cache and costs nothing to repeat. Transcription is different: every hour of audio is processed for you, so it is metered on every plan, Pro included. Playing audio back, repeating a sentence and recording yourself are never metered.
Unlimited translation and explanation are meant for ordinary personal study. They are not a licence for bulk or automated processing. If an account's usage is far beyond what one learner could produce, we slow it down and contact the account holder before doing anything else. Transcription hours are hard metering, not a fair-use threshold.
Only upload audio you have the right to use. Do not resell access to the service, share an account, or use automated means to abuse it. Podcast content remains the property of its creators; Chorus streams and stores episodes only for your personal study.
Subtitles, translations and explanations are produced by AI models and may contain errors. They are learning aids, not authoritative translations, and should not be relied on for anything where a mistake would cause harm.
Purchases are handled by Apple, and refunds are granted by Apple under the App Store terms. We cannot issue a refund directly, but we will help you document a request if the app did not work as described.
We may change or discontinue features, and we may suspend an account that breaks these terms. If a change materially reduces what a paid subscription provides, we will say so in the app before it takes effect.
The service is provided “as is” without warranties of any kind. To the maximum extent permitted by law, we are not liable for indirect or consequential damages arising from use of the app.
Questions about these terms: support@ningxiaochen.com.