SignalWatch: Real Signal Test

The "4G" indicator on your phone reports radio signal strength. It does not report whether anything is actually loading. On a train, in a car, on a bus, those two things come apart constantly: four bars and nothing moves, or one bar and video plays fine. SignalWatch measures the second thing. Press Start once and put the phone in your pocket. You get a notification the moment the connection becomes good enough for what you're waiting for — and another the moment it dies. "Connection is back — 6.2 Mbps. YouTube 1080p, video calls, everything works." "No data is getting through. LTE is showing, but nothing is loading." WHAT IT ACTUALLY MEASURES Every check asks three independent services — Cloudflare, Google and Apple's own connectivity endpoints — whether they answer. If two of the three stay silent, the connection is dead, whatever the radio claims. That is the whole point: it is the…