Scrubline Space Launch Tracker

A space launch schedule built from what the range actually reserved. When a rocket launch slips, the next try is usually already on this board. Scrubline counts every backup night for free, and Pro puts times on them.

The trick is boat traffic. Before a launch the range reserves sea space under the flight path: a primary window plus backup nights, published to mariners days to weeks ahead. In the US that is the Coast Guard; elsewhere, whichever service covers that range. Inland ranges, like China's, do the same with airspace instead of sea. A scrub rarely wipes the slate: the mission steps down onto a night booked all along. We call that list the ladder.

Not An Official Source — Where The Information Comes From

Scrubline is an independent app. It is not affiliated with, endorsed by or authorised by any government agency or launch provider, and it does not represent one. It shows a reading of public government publications, and those publications are the authority. Every publication the board is assembled from is named in the app and linked to the publisher's own page, one tap from the board under "Where the data comes from".

Never navigate by this app and never make a safety decision on it.

Why Most Launch Trackers Show One Time

Nearly every rocket launch tracker runs on the same launch schedule database. A fine database, but it holds one window per launch and no backup field: nowhere to put a ladder. So a mission another app shows as one evening can already be on its second reserved night here. The maritime notices are the other half, and they do not stick around: Scrubline reads them as they are published and keeps what it reads.

What Is On The Board

• Every mission's ladder: the next reserved launch window and how many backup nights the range booked behind it
• Florida rocket launches: the Space Coast launch schedule for Cape Canaveral and Kennedy, the Vandenberg launch schedule, plus Starbase, Wallops, Kodiak, Mahia, Kourou and more ranges worldwide
• A live launch countdown to the next reserved window: upcoming rocket launches, not a date somebody guessed
• No fake precision: when a date is really "sometime this month", we say so instead of counting down by the second
• Receipts per mission: the maritime notice in force, the airspace restriction where one is filed, and the pad forecast
• Can I see it from here: which way to face and, from close enough, how high the rocket must climb to clear your horizon
• Our report card, public: how our own alerts performed, per phone brand, bad rows left in

Launch Alerts That Follow The Ladder

The alarm at an hour out, fifteen minutes out and window open is scheduled on your phone, not sent over the internet. It fires with no signal, in airplane mode, at 3am. When a mission slips down its ladder, Pro rewrites that alarm in place instead of pushing a new one. What Android does to alarms is measured, not promised: Alert Health shows what this phone is doing to your alerts and which power settings you can fix. Plus a home-screen launch countdown widget.

Scrubline Pro

Free gets everything above except the backup times and the scrub rewrite.

Pro is the full ladder (a date and hour on every backup night), the scrub rewrite (your alarms move when the window does), and a lens planner that frames the shot before you stand in the dark.

What We Skip, On Purpose

Only the ranges listed in the app. The main gaps are Russia, where reliable data is not to be had, Korea, and a few smaller ranges.

Reserved is not attempted: a window passing unused usually means nobody tried that night, not a scrub.

The weather is the public forecast for the range at that hour. No go/no-go number yet: nobody should cancel a hotel on an uncalibrated guess, so none ships before we can publish its accuracy record beside it.

No account, no email address. A subscription is billed by Google Play and restores from it. No advertising identifier. No ads.