Never miss your bus or train.

Every nearby bus and train, in one live list, sorted by walking distance. Built for people who'd rather glance once than dig through tabs.

Free to start · Live CTA arrivals · Your location stays on your device.

The Stratus Nearby screen, live CTA departures sorted by walking distance

The Nearby screen · tap a departure to follow it

01 The idea

Green means go. Red means wait.

Other apps tell you when the bus or train leaves. Stratus shows how long the walk takes and color-codes every departure, tight or comfortable, so you can see at a glance which ones you'll actually make.

Glance once. The color tells you whether to run.

A Stratus departure card for 95th/Dan Ryan: the next three Red Line trains read 1, 6 and 10 minutes, colored red, amber and green
Too late Tight Comfortable
02 What's inside

A short list of features. No filler.

No social, no gamification, no daily streak. Stratus is a glance, not a destination.

Stratus trip view tracking the Green Line to Harlem/Lake on a live map

Track any bus or train, live.

Pick a bus or train. Stratus follows it stop by stop until it reaches you, with both a list view and a map view of where it is right now.

Buses and trains, one list.

Sort by walking distance or by next departure, whichever you need right now. The 22 to Howard sits beside the Red Line to 95th. No tab-switching.

A real Stratus list: the J14 bus, the Brown Line to Kimball, and the Orange Line to Midway, side by side

Favorites you set yourself.

Save the routes you actually ride. They sit at the top, even when you're nowhere near them. No algorithm, no surprise reordering.

The Favorites section in Stratus: Austin, Kimball, and Howard pinned to the top

Service alerts, surfaced.

A strip appears at the top of your list when there's a delay, reroute, or outage on a route you ride, leading with what's actually happening, straight from the CTA's official advisories.

Red Line delays near Howard, 10–15 min ×
03 The promise

Your location never leaves your device.

Stratus needs to know where you are. That's the whole point. It does not need to tell anyone else. So it doesn't.

  • No accounts. Nothing to sign up for. No email, no phone number, no password.
  • Anonymous by design. No profiles, no ad identifiers, nothing for sale. The only thing Stratus collects is anonymous crash and usage telemetry: enough to fix bugs, nothing that points back to you.
  • Location stays local. Your phone uses GPS to find nearby stops, then asks the CTA for them by identifier. Only nearby station identifiers ever leave your device, never your coordinates.
  • No ads. Ever. Not now, not later. There is no business model that involves selling you.
A CTA train pulled up to a platform on a clear day in Chicago

Chicago · CTA

For the six minutes that actually matter.

Available on iPhone

Never miss your bus or train.

Free to start. No account, no email, no tracking. Glance once, walk to the platform.

Free to start · iOS 18+.

The Stratus Nearby screen, live CTA departures sorted by walking distance