Span: Physics Bridge Builder
Truss puzzles, engineering sim
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
Span is a calm, physics-driven bridge builder. Draw a bridge across the gap, choose your materials, then press Test and watch it carry the load — or buckle in glorious slow motion.
Every beam glows with the forces running through it: a live X-ray of tension and compression, so you can see exactly why it held, or why it snapped. Rewind, move one strut, try again.
• 57 hand-built levels across eight worlds — timber valleys to ocean straits
• Timber, steel, stone, cables and road & rail decks
• Real hazards: wind, earthquakes, thermal stress and floods
• Drawbridges, canal locks, trains and passing ships
• God-mode Sandbox: unlimited budget, every material, every disaster
• Level editor: sculpt terrain, place anchors, schedule the traffic
• One-tap replay export — share your best holds and worst fails
No ads. No timers. No subscription. Buy once, build forever.
Free through Chapter 1 — unlock the full game (all worlds, the sandbox and the editor) with a single purchase.
Road vehicle models by Daniel Zhabotinsky (CC BY 4.0). Full credits in-app.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Real trains, real strain. A hand-crafted locomotive family replaces the box trains, and bridges now take a permanent set past 70% load — they sag, survive bent, and carry the scars.
Then play god with the weather. Flame chars timber and spreads along it; freeze makes steel brittle and grows ice heavy enough to sink a deck; zap, pull and tornado do the rest — and you can now grab a car and throw it. (Stars stay honest: experiments don't score.)
Also in 1.2: a new look built on the stress spectrum — the ramp every beam glows with under load, now the app's icon and identity — plus per-world light and geology, iCloud sync across devices, and a roomier iPhone HUD.
The developer, Dodecki Labs, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Dodecki Labs LLC
- Size
- 62.7 MB
- Category
- Puzzle
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
English and 14 more
- English, Belarusian, French, German, Indonesian, Italian, Japanese, Korean, Portuguese, Russian, Simplified Chinese, Spanish, Traditional Chinese, Turkish, Ukrainian
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Span Complete $7.99
- Copyright
- © Dodecki Labs LLC

