Compare / Sound Off vs Mojo
Sound Off vs Mojo
Mojo is a slick Reels and template editor. It's also a cloud app: to power its AI features it can send your video to third-party servers, including one in China. Sound Off does captions on your iPhone, and sends nothing anywhere.
What each app collects
Straight from the App Store. Every app declares its data practices to Apple. Here's what each one says about itself.
Mojo by Archery Inc.
- Used to track you
- Usage Data
- Linked to you
- User Content, Diagnostics
- Also collected
- Search History, Identifiers
App Store privacy label, June 2026
Sound Off by Joylord Systems Ltd
- Data not collected
- The developer does not collect any data from this app.
App Store privacy label, June 2026
"User Content" means your videos and photos. Mojo's label says it's collected and linked to your identity. Sound Off's label says nothing is collected at all.
Where your video actually goes
Mojo is a Western app, but that doesn't mean your footage stays close to home. Its own privacy policy spells out the trip your video takes when you use its AI features.
"images or videos, which may include faces, are sent to trusted third-party providers… only when the User initiates the use of these features."
Mojo Privacy Policy
And the policy lists where those providers process your content. Among them:
- Google AIUnited States
- falUnited States
- GladiaFrance
- KlingChina
So a video you shot on your phone, to add some captions, can end up on a server in another country to be processed. That's not a knock on any one vendor: it's just how cloud AI works. The point is that it leaves your device at all.
On your phone, not a server farm
Sound Off transcribes, styles, and exports entirely on your iPhone, using Apple's on‑device speech model. There is no upload, no account, and no third‑party AI provider in the loop.
Put your iPhone in airplane mode.
Sound Off still works.
Try that with a cloud editor.
Pay once, not every month
Mojo's Pro runs as a recurring subscription. Sound Off is a single purchase: you pay once and it's yours.
To be fair to Mojo: it does far more than captions, with templates, transitions, and a polished Reels toolkit, and it keeps its face detection on your device ("does not collect, store, or transmit any face data"). If you want a full template editor, it's a good one. Sound Off isn't trying to replace it. It does one thing (stylish, accurate captions for vertical video) and it does that one thing without your video ever leaving your iPhone.
Captions that stay on your phone.
On‑device transcription, twelve caption styles, a one‑time purchase.
Sources
Data practices are taken from Mojo's and Sound Off's App Store privacy labels ("App Privacy", captured June 2026) and from Mojo's published privacy policy (Archery Inc.), which names the third-party providers and their processing locations quoted above. Content is sent to those providers, per the policy, "only when the User initiates the use of these features." Labels and policies can change; quotes reflect June 2026.