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.

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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.

    Privacy practices may vary, for example, based on the features you use or your age. Learn More

    The developer has not yet indicated which accessibility features this app supports. Learn More

    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.
    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+
    In-App Purchases
    Yes
    Copyright
    • © Dodecki Labs LLC