DualVox Support

Last updated: October 20, 2026
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DualVox is a talk-through recording app from Zhongke Youyun (Beijing) Information Technology Co., LTD. This page is the App Store support URL: how to reach us, common issues, and where to manage your account or membership.

See the DualVox User Guide for product help. Legal terms are linked at the end of this page.

1. Contact us

Hours: 10:00–19:00, Monday–Friday, Beijing time. We usually reply within 1–3 business days. Please include:

2. In-app help

3. Common questions

I can’t open front and rear cameras at once

Dual-cam needs hardware and OS support for simultaneous cameras. If your device doesn’t support it, DualVox shows a notice and falls back to a single camera or media talk-through. That is expected, not a crash.

Camera, microphone, photos, or location don’t work

Turn on the matching permission for DualVox in system Settings. If a permission is off, capture, audio, saving videos, or the place watermark will be unavailable or reduced.

Why does DualVox appear in my video?

The DualVox name appears in the end card after you stop. Free accounts can pick a look in Settings; members can turn it off or use their own video. Info-watermark styles may still show DualVox as part of the stamp.

How do I sign in or copy my user ID?

When you are signed out, tap the small Sign in link on the right of the Account & membership heading. iOS uses Sign in with Apple. Android offers mainland China mobile-number sign-in only in Simplified Chinese. After you sign in, that link is hidden. Tap the membership row under Account & membership to copy your user ID so we can look up membership and orders.

How do I subscribe, cancel, or get a refund?

iOS membership is sold through Apple In-App Purchase. Subscribe and renew in the app and on the App Store. To cancel auto-renewal or request a refund, use your Apple ID (Settings → Apple Account → Subscriptions, or Apple’s refund process). We cannot refund Apple charges on Apple’s behalf. On Android, after Simplified Chinese sign-in, you can buy membership once with Alipay and pay again when it expires. For refund help, email [email protected] with your account ID and order number.

How do I delete my account?

After signing in, scroll to the bottom of Settings and tap Delete account. We then delete account and related server data under our control (except where the law requires retention). This cannot be undone.

Does the teleprompter appear in the finished video?

No. The teleprompter is only on screen while you record. It is not written into the video. To put words on the clip, use Edit video or Extract text in Tools.

How do I add captions? Speech Recognition will not turn on

Open Discover → Tools → Edit video, import a clip, recognize speech, edit the lines, then export. For text only, use Extract text; you can copy the result. Recognition stays on the device; audio is not uploaded. Free transcription is up to 10 minutes; members unlimited. On iOS, enable Speech Recognition for DualVox in system Settings. The first time you use a language, a recognition pack may download once; keep the network on.

How long can I record for free? Is follow-record limited by count?

Recording and follow-record are free up to 1 minute per take, then auto-stop and save, with no weekly count. Extract text is free up to 10 minutes. Members have no time cap.

How do I use AI script? How many times per day?

Discover → Tools → AI script. Sign in and subscribe first. 40 times per day. Enter a topic or notes, or hold to talk. You can add the script to the teleprompter or turn it into a voiceover. Extract-text results can tap “Use for a script”; the teleprompter can also polish or expand an existing script.

How much cloud narration do members get? Who can buy a personal voice?

Members get about 25,000 Chinese characters of cloud multi-voice narration each month. After that, members can buy an extra 20,000 characters in Settings → Add-ons (valid 1 month, then unused credits expire); non-members cannot. Personal voices are membership-only and can be bought on demand after you subscribe; non-members cannot buy them. On-device voices do not use cloud quota.

Why does the Weather card need the network?

When you pick Weather, DualVox sends the current coordinates to Open-Meteo for temperature. The request does not go through DualVox servers. Place and weather cannot be edited. Without location permission, weather details stay hidden.

4. Legal

5. Developer