I use a third party keyboard which has suggestions and the developer claims – on his website – that it stores everything locally on the device, but there is no word on this matter in app description on the App Store.

So I was wondering if there is a way I could monitor the data being sent/received by this app while connected to WiFi, as it seems there is no data being sent/received over cellular cause it doesn't appear in the "USE CELLULAR DATA FOR" in Settings > Cellular.

  • @DavidPostill I think it's fine for the question to stay here. The solution requires a dedicated computer acting as a man-in-the-middle proxy to which the iPhone connects. Or at least a router capable of sniffing WiFi data, if the data is sent without app-layer encryption. – slhck Feb 24 '16 at 16:21
  • @slhck Fair enough. VTC and comment removed. – DavidPostill Feb 24 '16 at 16:22
  • What networking equipment (other computers, router, etc.) do you have at hand? – slhck Feb 24 '16 at 16:52
  • @slhck thanks for your help, I've got a MacBook Pro & a D-Link router. – Pedram Feb 24 '16 at 18:17

You can try to use Paros for that. Take a look at this detailed guide for more information: http://blog.jerodsanto.net/2009/06/sniff-your-iphones-network-traffic/

The only problem with Paros is that it only captures HTTP GET/POST requests using the standard method, so to get all network traffic, do the following:

  1. Just turn on network sharing over WiFi and run a packet sniffer like Cocoa Packet Analyzer (in OSX).

  2. Then connect to the new network from iPhone over WiFi. (SystemPreferences->Sharing->InternetSharing)

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