Runway

How long could you survive if you lost your income tomorrow?

Most finance apps tell you where your money went. Useful, but it doesn't tell you whether you're actually okay. With jobs less certain and costs going one way, the more useful question is: how long could you last if your income stopped?

Runway is a cashflow control app. Put in your income, bills, debts, and balances — it gives you a number in months. That's your runway. Build it up, keep it above your target, and you've got breathing room when things don't go to plan.

All your data is stored on your device only — nothing is sent online or shared with anyone.
Open Runway

Who it's for

Contractors, freelancers, self-employed — anyone whose income can change month to month. But it works for anyone who wants a straight answer about their finances rather than a breakdown of what they spent at Tesco.

If you've looked at your balance and thought "we're probably fine" without actually checking — this fills that gap.


The core idea

Runway tracks two levels of spending. Essentials is the floor — rent, utilities, debt payments, the things you can't cut. Total outgoings is everything. Your runway is calculated against the full picture, but you can also see how long you'd last on essentials alone. That gap is worth knowing.

Saving Ahead is the part people miss. Car insurance, the dentist, a family holiday — they don't come out monthly but they will come. Runway takes those annual and one-off costs and works out what you need to set aside each month so they don't catch you short.


The five tabs

Dashboard
Your runway in months, what's left after everything, a breakdown of where your income goes, account balances, active debts, and what's still unpaid this month.
Bills
Monthly bills you tick off as you pay, annual bills spread as a monthly set-aside, and life events — planned costs that shouldn't catch you off guard.
Forecast
A day-by-day view of the current month. When income lands, when bills go out, when debts are due, and your running balance throughout.
Statement
Log payments as they happen so your forecast reflects reality, not just projections. Download a CSV for any month.
Setup
Account balances, income sources, debts, runway target. Export a backup or restore from one.

Install on your home screen

Runway is a PWA — it installs directly from Safari and works offline. No App Store, no download.

1
Open csrunway.netlify.app in Safari on your iPhone or iPad.
2
Tap the Share button at the bottom of the screen.
3
Tap Add to Home Screen, then Add.
4
Open Runway from your home screen — full screen, no browser chrome, works offline.

No bank connections. No open banking. Manual entry only — your data never leaves your device.