Comparison

Imperium vs World War X

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

Head to head
About

Imperium

Lead the Roman legions to victory against barbarian hordes and Carthaginians. Strategize your battles and become the champion Rome needs. A tactical autobattler set in ancient Rome.

Highlights
  • Tactical autobattler gameplay
  • Lead Roman legions
  • Battle barbarian hordes
  • Conquer Carthaginians
  • Strategic combat
Features
Read full description

The barbarian hordes of Gaul, and the cunning Carthaginians have almost brought Rome to its knees. The Roman people pray to Jupiter for a champion to drive out these enemies, will that champion be you?

About

World War X

Features
Read full description

Merge your troops and command your armies. Crush real players in fast auto-battles. World War X is a real-time PvP auto-battler that's easy to learn but hard to master — draft your deck, merge units to power them up, and outsmart live opponents in minutes-long matches. THREE FACTIONS, ONE WAR Build armies from the Human military machine, the psionic Alien swarm, or the relentless Zombie horde. 25+ unique troops, each with its own role — from Marines and Siege Tanks to Zombie Behemoths and Alien Motherships. MERGE TO DOMINATE Combine matching troops mid-match to level them up and turn the tide. Unlock new units mid-match to counter your opponent. Every round you draft, merge, and reposition — smart play beats big spending. REAL-TIME PvP ARENAS Climb the ranked ladder across six arenas. Match against live players, win trophies, and prove your strategy is the best. CAMPAIGN MISSIONS & PvE Progress through the campaign and strategize against epic raid bosses and varied game modes. ABILITIES & AUGMENTS Customize your units with game-changing powers mid-battle — Tactical Jump, Mass Cloak, and more. Equip augments to build a deck that fits your style. ENDLESS WAYS TO PLAY • Boss Strike — unload on a massive boss with a fully-upgraded army • Survival — how many rounds can you last? • Holdout — Defend your siege tank from incoming forces • Campaign — 65+ missions of escalating PvE chaos Your army. Your strategy. Your arena. Download World War X and start the war!

Screenshots

Imperium3 screens
World War X4 screens

Verdict

The call

The clearest difference is ads: Imperium at none against World War X's shown. Imperium also leads on iOS requirement (13.0 vs 15.0). World War X's advantage is update cadence (every 2 days vs every 2 weeks). On price, in-app purchases and device support there is nothing between them.

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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Imperium sells 2 one-off in-app purchases and World War X sells 10 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Imperium ships an update every 2 weeks, World War X every 2 days. The most recent releases landed on October 30, 2026 and November 5, 2026 respectively.

Scorecard3 real differences · 7 level
Imperium versus World War X: the parameters behind the verdict, then further details
ParameterImperiumWorld War X
PriceFreeFree
Rating4.2 (30 ratings) — better—
Positive reviews72.0% of reviews—
Number of ratings30 — better—
Update frequencyEvery 2 weeksEvery 2 days — better
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.0 — better15.0
Further details — not scored
Size89 MB258 MB
Age rating9+12+
DeveloperRene SlumpDaniel Chao

In-app purchases

2 purchases

Imperium

One-time2
  • Pouch of Gems$3.99
  • Chest of Gems$12.99
10 purchases

World War X

One-time10
  • Epic Level-Up (Lv 6)$4.99
  • Monthly Pass$4.99
  • Legendary Path$7.99
Show 7 more
  • Epic Level-Up (Lv 8)$8.99
  • 5 Guaranteed Epics$9.99
  • Legendary Level-Up (Lv 10)$14.99
  • Guaranteed Legendary$17.99
  • Legendary Level-Up (Lv 11)$19.99
  • Legendary Level-Up (Lv 12)$29.99
  • Legendary Level-Up (Lv 13)$39.99

Questions

Is Imperium free?
Imperium is free to download, with in-app purchases available.
Is World War X free?
World War X is free to download, with in-app purchases available.
Do Imperium or World War X have ads?
World War X shows ads; Imperium does not.
Which is updated more often, Imperium or World War X?
Imperium ships an update every 2 weeks, and World War X every 2 days. Most recently, Imperium was updated on October 30, 2026 and World War X on November 5, 2026.

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