How do notifications work in the official Telegram Android app? Does it have the same mechanism as Signal, which only recognizes the presence of notifications via Google services, but sends them via its web socket service?
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Telegram uses Google services like Signal for notifications - https://telegra.ph/Notifications-FIX its the first point under the Android section
https://core.telegram.org/api/push-updates these are the docs for building your own Telegram app, specifically the push notifications section and again it mentions using APNS for iOS or FCM for Android but they also offer Simple push which would work with Unifiedpush and would be one way to bypass FCM but I don’t know if they offer that in their official app or if there are any other Telegram apps that have implemented it
Signal does not use google if it is not available, so no. If you think about privacy, stop using apps like Telegram and please stop using google services
I’ve noticed notifications are working sporadically now for quite some time (at least half a year now) for both Android (both Play store version and APK) and iOS from my experience. Only on the deskptop version of it are notifications instant, hope they will fix it at some point
i assume that the official telegram client uses FCM. but the Telegram FOSS client on Fdroid and its forks use a background service.