SonaCap / 声幕
Support
Help for realtime audio subtitles, translation, iPhone built-in browser features, and purchases. Available on iPhone and Mac. (Mac version does not include a built-in browser.)
Contact
For support, bug reports, feedback, feature requests, or purchase questions, email sonacap.support@gmail.com.
Please include your device model, OS version (iOS or macOS), app version, and a short description of what happened.
Common Help
What system version do I need?
The iPhone release of SonaCap requires iOS 26 or later. The Mac release requires macOS 14.2 or later. Realtime translation depends on Apple's Translation framework and system-managed language resources.
How do I start realtime audio translation? (iPhone)
On iPhone, open SonaCap, choose input and output languages, tap the Broadcast button, select SonaCap Capture, and start Broadcast. Then play audio in the built-in browser or another app while SonaCap remains open. iOS uses a Broadcast Upload Extension because apps cannot directly capture other apps' audio. The built-in browser is an iPhone feature and is not available on Mac.
How do I start realtime audio translation? (Mac)
On Mac, SonaCap captures system audio directly through macOS — no Broadcast step is required. Open SonaCap, choose input and output languages, and start capture. The first time, macOS will ask you to grant Screen Recording (system audio) permission in System Settings > Privacy & Security.
Why do captions sometimes lag or miss words?
Speech recognition and translation quality can be affected by audio quality, background noise, language choice, device performance, iOS Broadcast behavior (iPhone) or system audio capture (Mac), Apple Speech, Apple Translation, and local fallback models.
Is speech recognition local?
By default, SonaCap requires Apple Speech to process speech recognition on device when the selected input language supports it. You can change Local Apple Speech in the app's About menu.
Is translation local?
SonaCap uses Apple's Translation framework and system-managed language resources for translation. Some language pairs may require an Apple language pack download before translation is available.
If translation keeps showing that a language pack is downloading or preparing, install or open Apple's Translate app, download the selected input and output languages there, and use Translate to check the download progress.
Does webpage text translation count toward the audio trial?
No. On iPhone, webpage text translation in the built-in browser is separate from realtime audio subtitle translation. The Mac version does not include a built-in browser. Realtime audio subtitles include 5 cumulative free minutes before SonaCap Unlock is required.
How do I restore a purchase?
Open SonaCap, go to About > Purchase & Restore, and use Restore Purchase.
Important Safety Notice
Captions may update quickly. Stop using the app immediately if rapid text changes, subtitles, video, or screen motion cause dizziness, eye strain, nausea, headache, discomfort, or any other adverse symptoms.
Do not rely on SonaCap for emergency, medical, legal, safety-critical, financial, navigation, or other high-stakes decisions.