Identifiers and usage data.
Yes. Dual Messenger for Web App Duo's developer declares identifiers and usage data as data used to track you — data that can be combined with other companies' data for targeted ads or ad measurement, or shared with data brokers. On iPhone you can refuse: tap Ask App Not to Track, or switch off tracking requests for every app in Settings.
What “tracking” means on an iPhone
Apple defines tracking as linking data from this app with data from other companies' apps, websites or offline sources for targeted advertising or ad measurement, or sharing it with a data broker. It is narrower than “collecting data”: an app can collect a lot without tracking you, and a small app can track you with a single advertising SDK.
Since iOS 14.5, App Tracking Transparency requires every app to ask before it accesses your device's advertising identifier or otherwise tracks you. The App Store label is where the developer declares which of its data is used that way. Dual Messenger for Web App Duo declares 2 data types, so expect the “Allow Dual Messenger for Web App Duo to track your activity across other companies' apps and websites?” prompt.
The data Dual Messenger for Web App Duo uses to track you
Identifiers
An account ID, screen name, customer number or a device-level ID such as the advertising identifier. Identifiers let a service recognise the same person or phone across sessions. Combined with other data, they are what makes cross-app tracking possible.
Usage Data
What you tap, open and view inside the app, plus which ads you have seen. Product analytics show developers which features are used. The same records can also feed advertising when an app declares tracking.
How to stop Dual Messenger for Web App Duo from tracking you
- When Dual Messenger for Web App Duo shows the tracking prompt, tap Ask App Not to Track.
- Already said yes? Open Settings › Privacy & Security › Tracking and switch off the toggle next to Dual Messenger for Web App Duo.
- To refuse every app in one go, switch off Allow Apps to Request to Track on the same screen. Apps then cannot ask, and are treated as if you declined.
- For Apple's own ads in the App Store, News and Stocks, see Settings › Privacy & Security › Apple Advertising and turn off Personalised Ads.
- Inside Dual Messenger for Web App Duo, look for an analytics or personalised-ads switch in its own settings; it covers data the iOS switch does not.
Dual Messenger for Web App Duo's full privacy label
None declared
Is Dual Messenger for Web App Duo safe? Every data type explained →
Do other secure messengers track you?
14% of the 172 secure messengers with a label in our snapshot declare tracking; 29% say they collect nothing at all. Nearby in the list:
| App | Tracks you? | Data types |
|---|---|---|
| TeleGuard | No | 0 |
| CoolApp Cambodia | No | 5 |
| Chot | No | 0 |
| RueChat | No | 3 |
| Amtelco Secure Messages | No | 1 |
| Xelo Messenger | No | 4 |
| Tato Talk | No | 0 |
| Twake Chat | No | 4 |
Check your settings
Done. You have applied every control the label points to.
True or false?
- Right.Not quite.
True: it lists identifiers and usage data under Data Used to Track You.
- Right.Not quite.
Labels are self-reported by developers. Apple can reject or remove apps that misrepresent practices, but it does not audit each label.
- Right.Not quite.
True: Identifiers appears on its label.
- Right.Not quite.
It is collected and sent; the developer says it is de-identified rather than tied to your account or device.
FAQ
How do I stop Dual Messenger for Web App Duo from tracking me?
Will Dual Messenger for Web App Duo still work if I decline tracking?
What is the difference between tracking and data linked to me?
Does declining tracking stop all data collection?
Can apps track me without asking?
Is Dual Messenger for Web App Duo safe? Full privacy report →How to lock Dual Messenger for Web App Duo on iPhone →Who tracks you? A–Z →All social networking apps →