Orbit Slinger
A planet-flinging physics game for iPhone and iPad. Grab a planet, swipe it sideways past a star, and use real gravity to keep every world in orbit — too soft and it falls in, too hard and it flies away.
No browser version: Orbit Slinger is an iOS-only app — there's no Android or desktop build. The official site does include a small "try it" physics toy you can flick planets around in right on the page.
How to play
- 1Drag a planet from the tray
Pull a planet out of the bottom tray and throw it sideways past the star.
- 2Find the orbit window
Too soft and the planet spirals into the star; too hard and it escapes into the dark. The rounder the orbit, the more points.
- 3Hit the goal count
Each level shows how many planets must stay in orbit — without hitting the star, resident worlds, or each other.
- 4Sling vs Guided
Sling throws blind and scores; Guided shows the predicted path but earns nothing and is meant for learning or unlocking past a stuck level.
Free vs paid
| Content | Price |
|---|---|
| Sol · Our Solar System | Free — the full first campaign, 10 levels |
| Proxima · Red Dwarf | One-time unlock — half Sol's gravity, tugging neighbors |
| Crimson Giant | One-time unlock |
| Azure Pulsar | One-time unlock |
| Orbit Lab | One-time unlock — N-body gravity sandbox (figure-eights, binary stars, Jupiter's Trojans) |
| Bundles | Two discounted bundles covering all campaigns / everything |
No subscriptions, no consumable currency, no random rewards. Extras on top: a Daily Challenge level, replays you can save to Photos, and 33 Game Center achievements.
FAQ
Who makes it?
Solo developer Justin Martin. A kids' game with no ads, no accounts and no tracking — progress stays on the device.
Is it the AI sales tool?
No — a same-named "Orbit Slinger" AI sales product exists and is unrelated. This page covers the physics game at orbitslinger.app.
Real science?
Planets use real spacecraft surface maps and real NASA fact-sheet stats — tap any planet for orbit data in real units.
Stuck on a level?
Tap the SLING chip top-right to switch to GUIDED, see the predicted path, place the planet and release — it unlocks the next level but scores zero.