Comparison

Span vs Tower Builder

Price, ratings, monetisation and update history for both games, side by side โ€” with what reviewers say about each.

Head to head
About

Span

Features
Read full description

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 โ€” 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. โ€ข 57 hand-built levels across eight worlds โ€” timber valleys to ocean straits โ€ข Timber, steel, stone, cables and road & rail decks โ€ข Real hazards: wind, earthquakes, thermal stress and floods โ€ข Drawbridges, canal locks, trains and passing ships โ€ข God-mode Sandbox: unlimited budget, every material, every disaster โ€ข Level editor: sculpt terrain, place anchors, schedule the traffic โ€ข One-tap replay export โ€” share your best holds and worst fails No ads. No timers. No subscription. Buy once, build forever. Free through Chapter 1 โ€” 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.

About

Tower Builder

Read full description

Tower Builder: Earthquake Simulator is a physics-based simulation game where you design, construct, and test structural stability against various earthquake intensities. Build high-rise structures, optimize beam/column load distributions, and analyze real-time structural performance under seismic forces.

Screenshots

Span4 screens
Tower Builder4 screens

Verdict

The call

The clearest difference is ads: Span at none against Tower Builder's shown. Tower Builder's advantage is iOS requirement (15.0 vs 17.0). On price, update cadence, in-app purchases and device support there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Span sells 1 one-off in-app purchase and Tower Builder sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Span ships an update every 5 days, Tower Builder every 4 days. The most recent releases landed on October 4, 2026 and October 5, 2026 respectively.

Scorecard2 real differences ยท 4 level
Span versus Tower Builder: the parameters behind the verdict, then further details
ParameterSpanTower Builder
PriceFreeFree
Update frequencyEvery 5 daysEvery 4 days โ€” better
AdsNo โ€” betterYes
In-app purchasesYesYes
DevicesiPhone, iPadiPhone, iPod
Requires iOS17.015.0 โ€” better
Further details โ€” not scored
Size60 MB74 MB
Age rating4+4+
DeveloperDodecki LabsAXIAL MUHENDISLIK VE YAZILIM LIMITED SIRKETI

In-app purchases

1 purchases

Span

One-time1
  • Span Complete$7.99
1 purchases

Tower Builder

One-time1
  • Remove Ads$2.99

Questions

Is Span free?
Span is free to download, with in-app purchases available.
Is Tower Builder free?
Tower Builder is free to download, with in-app purchases available.
Do Span or Tower Builder have ads?
Tower Builder shows ads; Span does not.
Which is updated more often, Span or Tower Builder?
Span ships an update every 5 days, and Tower Builder every 4 days. Most recently, Span was updated on October 4, 2026 and Tower Builder on October 5, 2026.

Other comparisons