Comparison

Circular Defense vs Monstropia

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

Head to head
About

Circular Defense

Engage in a unique tower defense experience where enemies approach the core from all sides. Strategically place and upgrade circular turrets to defend your position across over 50 challenging stages. Enjoy a smooth, time-killing gameplay with simple controls and deep strategic possibilities.

Highlights
  • Unique circular turret defense
  • Strategic placement and upgrades
  • Over 50 challenging stages
  • Easy to operate controls
  • Smooth, time-killing gameplay
Features
Read full description

They are coming closer towards the core! Tower defence with a flat design. ◆How to play- - Enemies come attacking from all four directions towards the core in the centre. - Homing? Piercing bullets? Choose a circle from 6 kinds of variations as you wish and make your own defence line! - Choose a circle and arrange by swiping, tap to make turrets-they are all easy to operate! - Use resources by attacking enemies and strengthen the circle! Make it stronger! It becomes easier to capture the stages! ◆Features - You can play so smoothly, whenever you have some spare time! - Use strategy? Try to be funny? You can arrange any way you like. - Timing of arranging the circle and timing of using turret are important factor of the battle. - There are more than 50 stages waiting for you from easy ones to quite difficult ones. ◆recommended for... - Those who are fans of tower defence or defending games - Those who like strategy games that are very strategic - Those who enjoy a smartphone games that bring training elements. - Those who want an efficient app to kill time while commuting. - Those who want to enjoy a game with simple rules. - Those that are looking for casual games for free. Please give us your opinions and requests here. https://www.picola.co.jp/contact-us

About

Monstropia

Features
Read full description

Monstertopia: Tower Defense is an exciting strategy game that will have you defending your base from hordes of enemies! You will need to use your tactical skills to plan the best defense against your hostiles. WELCOME TO THE LEGENDARY MONSTERTOPIA: TOWER DEFENSE GAME! Your tower is in danger! An army of enemies is trying to break through the defense.  Protect your castle from invasion! Use your weapons and defend the castle. Choose the most suitable weapon to protect the tower. You should be fast and accurate in order not to miss a single enemy. Get coins and open new levels. Every single level will reveal you as a real defender. Destroy the monsters and defend your castle! Remember: the tower will not protect itself! The army of invaders is numerous. Stay brave to stop the monsters and defend the tower. Enjoy the game and feel like a real warrior. With each battle, you'll gain coins that you can use to upgrade your weapons and to become more powerful. TEST YOUR STRATEGY WITH TOWER DEFENSE Are you ready for an epic battle? Monstertopia: Tower Defense is here to push your strategic skills to the limit! Play now and command a team of heroes as you face off against the monsters. Download this free game and unlock all the weapons! READY, SET, DEFEND Ready to prove your skills as a defender? Download Monstertopia: Tower Defense and conquer your enemies in this unique and free strategy game!  So what are you waiting for? Start your journey as a defender today! DEFEND YOUR CASTLE AND CONQUER THE LEVELS Take on the challenge of Monstertopia: Tower Defense! Open new levels, get coins, and prove you have what it takes to be a real defender. With Tower Defense you can be sure that your tower will be protected. Download our Tower Defense game and get ready for the ultimate gaming experience. MONSTERTOPIA: TOWER DEFENSE IS: * A perfect game for strategy fans * Variety of weapons * Epic monsters * Diversity of heroes * Atmospheric music and spectacular effects * Impressive graphics * Many difficulty modes * Regular updates with new chapters, enemies and heroes Rise up to defend your kingdom and become the real hero!

Screenshots

Circular Defense4 screens
Monstropia4 screens

Verdict

The call

The clearest difference is ads: Circular Defense at none against Monstropia's shown. Circular Defense also leads on update cadence (every 2 days vs every 16 months) and iOS requirement (8.0 vs 12.0). 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Circular Defense ships an update every 2 days, Monstropia every 16 months. The most recent releases landed on October 24, 2026 and October 27, 2026 respectively.

Scorecard3 real differences · 7 level
Circular Defense versus Monstropia: the parameters behind the verdict, then further details
ParameterCircular DefenseMonstropia
PriceFreeFree
Rating3.4 (8 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings8 — better—
Update frequencyEvery 2 days — betterEvery 16 months
AdsNo — betterYes
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS8.0 — better12.0
Further details — not scored
Size124 MB174 MB
Age rating4+9+
DeveloperPicola Inc.InGames LTD

In-app purchases

None

Circular Defense

No in-app purchases

None

Monstropia

No in-app purchases

Questions

Is Circular Defense free?
Circular Defense is free to download, with no in-app purchases.
Is Monstropia free?
Monstropia is free to download, with no in-app purchases.
Do Circular Defense or Monstropia have ads?
Monstropia shows ads; Circular Defense does not.
Which is updated more often, Circular Defense or Monstropia?
Circular Defense ships an update every 2 days, and Monstropia every 16 months. Most recently, Circular Defense was updated on October 24, 2026 and Monstropia on October 27, 2026.

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