Best Defence Online Apps & Games

241+ iOS apps & games curated and reviewed

3.9 avg rating
20 free apps & games
Updated September 2026

Castle Defense Online is the household name in defence online, but it's far from the only option. We track 241+ alternatives and competitors on iOS — many free, many higher-rated than you'd expect.

Compare top Defence Online Apps & Games (September 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Castle Defense Online - 4pCastle Defense Online - 4pFree4.2★ (101)YesYesSep 2026
2DDS StudentDDS StudentFree2.0★ (2)NoNoSep 2026
3Mobile Royale: Kingdom DefenseMobile Royale: Kingdom DefenseFree4.4★ (2.1K)YesYesSep 2026
4Plants VS BugsPlants VS BugsFree2.8★ (175)NoYesAug 2026
5Gracie Barra OnlineGracie Barra OnlineFree5.0★ (9)NoYesJul 2026
6Lords War: DefenseLords War: DefenseFree3.9★ (25)NoYesSep 2026
7Kingdom Defense - Protect Your Land From The Rush Of Evil EnemiesKingdom Defense - Protect Your Land From The Rush Of Evil EnemiesFree3.3★ (6)NoNoMay 2026
8Prey Day: Survival Game OnlinePrey Day: Survival Game OnlineFree4.5★ (4.9K)YesYesSep 2026

Top Picks for Defence Online

Castle Defense Online - 4p#1

Castle Defense Online - 4p by donghwan kim

Castle Defense Online
Editor's Choice
🎮 Games
4.2😊(101 ratings)
FreeAdsIn-App Purchases
Castle Defense Online - 4p screenshot 1
Castle Defense Online - 4p screenshot 2
Castle Defense Online - 4p screenshot 3
Castle Defense Online - 4p screenshot 4
Castle Defense Online - 4p screenshot 5

Engage in real-time cooperative defense against waves of enemies. Strategically build towers, collect unique characters and items, and team up with friends to overcome challenging bosses and protect your castle.

What We Love

  • 👍 Good gameplay mechanics
  • 🎨 Cute character designs
  • 🤝 Enjoyable co-op experience
  • 🕹️ Variety of game modes
  • 💎 Generous rewards/currency system

Room to Improve

  • 🔁 Repetitive gameplay
  • 🔄 Difficulty spikes in higher levels
  • 🏆 Reliance on high-ranked players for progress
  • 🌐 Lack of solo/single-player options
  • 🌆 Cluttered UI with too much information
Mobile Royale: Kingdom Defense#3

Mobile Royale: Kingdom Defense by IGG SINGAPORE PTE. LTD.

Online MMO & RPG Battle Games
Worth Considering
🎮 Games
4.4😐(2.1K ratings)
FreeAdsIn-App Purchases
Mobile Royale: Kingdom Defense screenshot 1
Mobile Royale: Kingdom Defense screenshot 2
Mobile Royale: Kingdom Defense screenshot 3
Mobile Royale: Kingdom Defense screenshot 4

Engage in real-time global strategy battles in a fantasy world. Develop your city, train troops, form alliances, and conquer with allies. Features include 3D graphics, unique heroes, and a Guardian Dragon.

What We Love

  • 🚀 Fast and efficient gameplay
  • 👍 Engaging and fun experience
  • 🎨 Beautiful graphics and visuals
  • 🤝 Good community and guild interactions
  • 💰 Generous free-to-play model

Room to Improve

  • 🔑 Pay-to-win mechanics
  • 🐛 Frequent crashes and bugs
  • 🕰️ Slow progression for free players
  • 🤯 Overwhelming complexity for new players
  • 🔄 Repetitive and grindy gameplay

More Defence Online apps to explore

FAQ about Defence Online

What are the best defence online apps & games for iPhone?
Castle Defense Online - 4p tops our defence online apps & games ranking as of September 2026, with a 4.2-star average from 101 App Store ratings, and it's free to download.
Yes — 20 of the top defence online apps & games we rank are free to download, including Castle Defense Online - 4p and DDS Student.
Castle Defense Online - 4p shows ads and offers in-app purchases, according to its App Store listing as of September 2026.
We track 241+ defence online apps & games on the iOS App Store as of September 2026, ranked by rating, recency, and analysis of real user reviews.
Castle Defense Online - 4p is a real-time multiplayer defense game where up to four players can cooperate to stop incoming enemies. It features strategic tower building, character collection, and a guild system.
Key features include real-time cooperative play for up to 4 users, easy 2D horizontal scroll controls, collecting unique characters and skills, strengthening with runes and relics, building diverse towers for strategic play, and joining guilds to grow with friends.