Spacecraft design & flight sim

Every mission starts as a blueprint.
Every voyage becomes a star.

Pull real hardware onto your hull, launch across eight worlds, and watch fuel burn down, gravity bend your trajectory and comms windows open and close — live, driven by real orbital mechanics, not a slot machine.

100% offline No ads, no accounts Free to fly
How it works

Four steps. Real physics the whole way.

No tutorials to sit through — the numbers answer while your finger is still moving.

01

Blueprint a mission

Name it, pick one of eight worlds, and start from a bare hull with every system drifting around it.

02

Pull the pieces in

Launch vehicle, fuel, instruments, crew, comms, landing gear, power — drag each toward the hull. Mass, delta-v and risk answer live.

03

Fly the launch

Fuel burns down in real time, gravity wells bend your trajectory as it passes, and comms windows open and close in front of you.

04

Watch it become a star

Every flight joins a galaxy you drag through and pinch to zoom. Your stats turn into objects you can turn in your hands.

Five sectors, one hub

Everything orbits a single ring

No tab bar, no menus. Swipe the hub to bring a section into view, tap to dive in.

Design Chamber

Real rocket science, not sliders that pretend. The Tsiolkovsky equation runs live under your hands.

System Sphere

Eight worlds orbit one living sphere. Zoom into any of them and read what you'd be getting into before you commit.

Observatory

A launch you watch, not a table you read. Gravity assists bend the stream and comms windows blink in and out.

Timeline Galaxy

No list of past flights. Every voyage becomes a star, and your history is a galaxy you fly through.

Analysis Nexus

Duration, fuel efficiency, comms quality and risk — each a living object floating in space, not a chart.

One ring, no tabs

Five sections hang in orbit around a single hub. Swipe to spin it with real inertia, tap to dive in.

System Sphere

Eight worlds to reach

Earth is where every voyage starts climbing out of. Everywhere else, you have to earn.

Earth

HOME · LAUNCH POINT

Where every voyage in this app begins by climbing out of the gravity well.

Mercury

Δv 13.2 km/s

Closest to the Sun and hardest to stop at — arriving costs more than leaving did.

Venus

Δv 5.5 km/s

A furnace under permanent cloud. Cheap to reach, brutal to stay.

Moon

Δv 6.0 km/s

Three days out — the only stop here you could reach and return from in a fortnight.

Mars

Δv 6.3 km/s

A thin atmosphere that's just thick enough to make landing interesting.

Asteroid Belt

Δv 8.8 km/s

Far emptier than it looks. Millions of rocks, and almost never one in sight.

Europa

Δv 15.6 km/s

Ice over a saltwater ocean, wrapped in the radiation Jupiter throws at everything nearby.

Titan

Δv 16.4 km/s

Thicker air than Earth and lakes of methane. You could fly there by flapping your arms.

Nothing ever touches the network No accounts, no tracking Free, with no ads

Real orbital mechanics, dressed up as a game you can't put down.

— the vibe we're going for
Contact

Send a transmission

Bug reports, mission ideas, or just tell us which world broke your delta-v budget.

This form is cosmetic — it displays a confirmation but sends nothing. For real support, write to polinaarhipova267@gmail.com.

Astra Odyssey app icon

Ready to clear the pad?

Design your first mission, pick a world, and find out if your numbers actually fly.