Last updated on December 12th, 2025 at 12:16 pm
Idle Monster TD – Entertainment Game Review
Idle Monster TD is a Entertainment/Adventure/Simulation game from Swell Games LLC, first launched in 22nd April 2020.
It’s rated 9+ and currently has 2,536+ ratings on the App Store.
What Makes Idle Monster TD Stand Out
Over 2 million players!
Protect the… monsters? As the commander of the United Monsters Alliance, you’ll defend your homeland from menacing machines in Idle Monster TD.
This delightful take on tower defense flips the script, putting you in charge of helpful creepy-crawlies trying to stop robot invaders from pummeling your base. Strategically place allies like Sea Stallion for extra-speedy attacks, or use Firefly for heavier damage. And if things get real dicey, just wipe the map clean with a firestorm spell!
Eradicating bots gives you upgrades to bolster power, speed, and other stats – and the more bots you obliterate, the more monsters you’ll unlock. Idle Monster TD’s menagerie is filled with awesome beasts, like cute water sprites and scorching fire devils. Discovering new creatures is part of the fun.
Like any loyal pal, Idle Monster TD takes care of itself when you’re away. Come back in a few days to claim gold and power up your defenses. Those robots don’t sleep—but neither do your monsters.
Features:
- Unlock 44 unique monsters of different elements (Water, Air, Earth, and Fire), all of which have different skill sets that make tower synergy crucial to success.
- Strategize by placing up to 10 monsters at a time. Determining the most effective combination of their elemental skills and passive boosts will keep you entertained and speculating for weeks!
- Play through 8 different maps, each requiring different strategies to defend most efficiently.
- Bi-weekly PvP tournaments give this casual game a competitive edge.
- Discover countless upgrades, research, spells, artifacts, relics, technology, and more to level up with a variety of different resources.
- Several rewarding mini-games, such as Drone Swarms, Cargo Ships, and Tech Ships.
- Non-stop, endless gameplay!
- Fantasy RPG-based world and classes.
- Complete tons of daily missions and achievements.
- Offline gold earnings reward you while the game is closed!
- Fun and cute pixel artwork.
Idle Monster TD is a perfect blend of the Idle and Tower Defense genres. The game is endless and can mostly play itself without you watching. However, an immense amount of strategy is required to play efficiently and place well against your peers on the leaderboards. Go on an epic never-ending quest, explore a fantastic world, battle robots and monsters, and defeat epic bosses in Idle Monster TD!
This Entertainment game offers engaging gameplay and regular updates for mobile players.
Player Feedback
As a newer release, Idle Monster TD is building its player community. Early feedback suggests .
Recent Updates & Development
Latest Update: 15th October 2023
Recent improvements include:
- Performance improvements.
- Bug fixes.
Download & Availability
Idle Monster TD is available through the official App Store for iOS devices.
Get Idle Monster TD on App Store
Requirements: Requires iPhone 5s / iPad Air / iPad Air (Cellular) / iPad Mini 2 (Retina) / iPad Mini 2 (Retina, Cellular) / iPhone 6 / iPhone 6 Plus / iPad Air 2 / iPad Air 2 (Cellular) / iPad Mini 3 or later.
Compatible with iPhone and iPad devices.
Player Experience Highlights
Community Insight:
We just started playing this game today we have 3 ultra rare monsters but it says evolution we know that you can collect grew up monsters like the fire bunny we love the fire bunny but maybe you could add more monsters like godly rarity monsters and they can evolve.
It is addicting and fun, we love earsy rider.
Really like the style and td against humans lol. Only have about 34 hours so far but its been hard to find something like this. And we just found out you made a sequel! Ill have to check it out soon. Thank you.
This game captures its name very well. The gameplay and visual elements of Idle, Monster and TD games are implemented so well together in harmony. What impresses us the most is the ad system of this game. Watching ads is not forced and does not feel like a chore if you do watch them. In fact, we want to watch the ads every time they are offered just because the rewards are so incentivizing. And the game is not paused during the ads, which is perfect for an idle game. We have never seen a game that can make ads feel good like this one. Overall, the gameplay experience is very unique and clearly well-thought in every aspect. No random feature thrown in just to squeeze out content and money like most other F2P games.
We just got this game earlier today and our highest wave count is already 159! We cant get enough of the BANGER soundtrack and cute monsters. The only thing we don't like is that for a while the rounds are easy and you just sit and wait while one monster destroys them all. We wish it was cheaper to increase the games speed. It costs 250 in-game gems we think, which is kinda a lot for just a small boost. Thats kinda it though! Love this so much.
This is by far the best game we have downloaded in a long time. Im always looking for tower defense type games to play that can last for a while. The game design is perfect and everything is explained clearly. Thank you so much to the creators for making a tolerable game with optional ads that actually help you out so we are compelled to watch them. Keep it up, this game should be what all game/app developers strive to achieve. Well done indeed you should get this game.
Love the game but our only complaint is that we wish we could see what we were going to get when we upgrade something. Thats pretty much our only complaint.
We wish the equip and upgrade button wasnt above n below each other. We keep accidently upgrading when we are trying to equip a different skill in challenge map. Its costing us alot of essence for skills we dont want to upgrade.
This game is awesome! So many options that keep you on your toes. Beautiful design and cute complex monsters. And the fact that you can prestige makes it all the best. Definitely worth the play and download. There are some small bugs though. NOTE TO DEVELOPER: we clicked the cargo ship option and it isnt spawning the cargo but ill receive the awards for our daily cargo spawn.. We really hate when it happens because we dont get the loot (500k gold 150 green soul things) name in game : blaqheart.
This is a great game. Only problem we see (as an avid player of many games, especially idle) is that the levels dont actually progress while youre offline. Only currency accumulates but to progress through the levels you have to leave the game open. That is not a true idle & honestly ruins the otherwise great experience. If this was changed Id happily give 5 stars.
Great tower defense idle game with fun upgrades and challenges. The costs are very expensive and should be 50% lower across the board , often times predatory with deals. Consider more new achievements and consider bumping free gems from 10 for ads to 20 gems Consider holiday events with bonus diamonds or 2x multipliers for diamonds or earn every 100 wave (flat rate without a buff).
It is actually fun but around wave 1000 it is horribly slow going. It takes us weeks to have the attention span to get back around our highest level. We have the x2 speed too but its still just way too slow going.
Loved the app but ever since the latest update, the app wont load so we havent been able to play for at least 2 weeks.
We were just chillin, then 75 gems disappeared. Cannot recover from this.
There are hardly any monsters, and like many others are saying offline progression is really needed, hate wasting battery life having to leave our screen on this app that is barely interactive anyway.
When we open the app it just gets hung at the loading screen, cant even play.
Ive been trying to transfer our progress to our new phone, and it keeps telling us that Im using an invalid user ID or password, when we know for a fact Im using the correct information. There doesnt appear to be a way to reset or recover any of this information. This is extremely annoying because we have essentially having to start from scratch. There is no help related to this issue online, or through your wiki. Please assist.
Just be ready to start paying around wave 480 Spent a week trying to reach wave 500 from wave 450.
Every time the game serves us an ad for Magic Arena the app freezes until we close it.
Overall the game is very good, no lag whatsoever, progressive gameplay, but it feels like there is a lack of monsters/towers to choose from, being theres only 4 in each category. Besides that, the game is perfectly fine as is, but it would be cool to see some new towers or events in the game.
We have honestly played almost every game our iPad has to offer and this game tops them all, we cant stop playing the game.
They dont have consistent ads for a start so thank you so much. Ive been playing for a few days and we adore this game, its simple, with an absolutely adorable art style, its original, its addictive, and super well made! 5/5 idle game, 5/5 tower game :D. Keep updating this game! Its one of the best mobile games ive seen yet :).
Hey developer we hope u see this please update the idle sword 2, knowing u making the new idle game it is great but the idle sword is great as well so please make a update on that game thx.
This is honestly one of the best games Ive ever played, our highest wave is 1499 so you know that we both love the game and Im soooooo close to unlocking the last monster pack. We have a few suggestions though: first, after around 1000 waves it becomes pointless to prestige again because all the effort to get back to that point is no longer worth the amount of prestige points offered, we think either the prestige points earned should get a giant boost or the upgrades from prestige points should be much cheaper. Second, we think one of the ads rewards should be one minute of no elemental shields because that would be a major help (and we say that with having maxed out percentage of enemies without shields and maxed out percent of enemies temporarily losing elemental shield on Squidler). Third and final suggestion, is to increase experience earned per kill because we have only one monster that is above level 100 and like we said earlier, our highest wave is 1499. Also, quick question; if Earsy Rider uses its turn around ability and the enemy enters Squidlers range while turned around, can its elemental shields still be taken down.
The game as a whole runs pretty smoothly and allows F2P (Free to Play) players compete evenly with other players in tournaments. This is due to the gems being earned in the game. On the other hand, when the game runs over 5 minutes; it crashes and reverts any progress made in the time running.
Honestly a perfect idle game. Im so addicted and love playing this at work. BUT the micro transactions are ridiculous and WHEN IS THE LIMITED TIME GEM SALE GOING TO END?!?! Its been monthsssss dude. Those pop ups are annoying and you know it. You made a good game but stuff like that is so unprofessional.
The game itself is fun but everything costs money. Want 2x speed, $$. Want to collect more than 4 hrs offline, $$. Dont want ads, $$. The list goes on and on. We foresee a paywall eventually also.
None of the leaderboards will load so we are unable to receive our rewards from the tournaments.
Not a bad game. Can be kind of addicting, but it is almost unplayable cuz it keeps crashing every couple minutes. Very frustrating.
Please help. We like your game, but this is bugged. We cant claim our points we won.
Overall concept is good. The game just moves so slow. You just watch as monsters creep slowly along in waves that take forever to advance through. An ad can be watched to speed up the game but lasts for only 2 minutes. Eventually towers get expensive to upgrade and you do nothing but watch and wait for money to come in. Becomes incredibly boring. Restarting currency also does not go far enough. Spend hours upon hours to reach the respec point to get a handful of small upgrades and then do it all over again. Also in game purchases are poorly priced. No way we would spend what they are asking, its way too expensive for what would be received.
Getting old. Is there ever going to be any new monsters.
A game that requires our device stay on to make any progress is not an idle game. And this game requires just that. You can earn money offline. But you cannot progress in the waves of enemies. Making the game exceedingly tedious when there are over 1,000 waves its a great concept. But its more like Monster TD than idle Monster TD.
After playing this game for a long time, and spending a little bit of money on it, our phone crashed. We had our phone backed up. When we got a new phone, this game did not save any of the data. It stated us over from the beginning. Every other game was restored. We reached out to the developers and have not heard back from them at all to get it fixed.
This game we like because it reminds us of Pokmon and we like that it has good evolution of the monsters and buffs that u can get.
Addicting game with a few flaws, but it crashes every 5 minutes for us and sometimes causes us to lose progress. 4/5 without the crashing. If the problem isnt fixed soon, not gonna be playing this for long.
Its so balanced and you get rewards for watching ads.
Honestly, we think everything about this game is great. The art style is executed well, the gameplay and strategy involved is good, and the process of collecting currency isnt too slow or too fast. There are a lot of different upgrades and ways to upgrade your monsters. Each is one is unique and actually helpful towards your progress. 5/5 stars, good job.
We upgrade attack speed and it gets slower not faster and you can refund it.
- We wont watch ads that require us to answer information about our age etc. Please offer an option to opt out of answering/skip answering if youd like to collect as revenue from us. 2. Why am we penalized for purchasing an ad-free experience? Those who watch ads can time their bonuses to progress through waves but Im forced to rely on luck to get a 2x damage buff near the limit of our progress? Boo.
Great game we would play it a lot last year and got really far. We just downloaded it again the other day and linked our progress to our phone and everything was there. Though, when we try to prestige a screen appears telling us Im going to Cursed Clouds; nothing happens. The white screen sits there. So we exit out of the app and go back in and im back. We received our prestige points but didnt reset our progress. Sort of annoying because we cant get essence or make any real progress unless theoretically we prestiged constantly and got a lot better stats using the points. That would be cool but thats not how you play the game. We hope someone can help us fix this glitch.
We have played this now for one day and it is soooooooooo fun it might be the best game we have played nothing else to say.
This game has a lot going for it and it is very fun. We know people like the optional adds, it is colorful and has good depth. We also like the different maps, but the one real issue we have is the game is more Idle Game than TD. Like really, a heavy grind and in the long run, prestigeing over and over and over again for permanent upgrades matters more than where you place your towers. Like there is very little strategy/td there when you think about it. There is a serious lack of towers as well. Essentially 12-16 total because many are just the upgrade of the lower version of it and they dont change as you level them. Dont get us wrong, it is fun and we are still playing it, but it is definitely not the best (hence the 4 star rating). Also there is this bug where your tower has targeting of the furthest in the maze but sometimes they definitely do not shoot the furthest. Overall, good game, but it is just missing something.
It just cancel your bossrush randomly. So annoying.
So far the game has crashed a couple times right after a boss wave, which is very inconvenient because when we start the game back up we have to redo the boss wave. Then whatever spells we used before the crash are still on cool down so we fail the boss wave.
This is probably 30% tower defense 70%, especially since you dont lose all progress if enemies reach the end like most tower defense games. Its the perfect game to casually play on the side while watching a stream or playing some other game.
Great game. We love the time and effort put into this game. We love how there arent ads, but you can watch some for bonuses. The developers are extremely nice, Ive spoken to them on discord. Seriously, download it.
This game is great love it, but it crashes randomly for no apparent reason its not to bad right now but if it crashes more we will tell you about it so you guys the developers can see if it is our problem or yours. Thank you.
We really enjoy the game honestly, but the only thing Im not quite sure about is the 3x prestiege rewards being 50 gems…even when you already have to either spend IRL money or 500 Gems to get it.
User feedback from Apple App Store
App Details
- Version: 108
- Size: 115.88 MB
- iOS: 12.0 or later
- Languages: EN
- Content Advisory: Infrequent/Mild Cartoon or Fantasy Violence
- Developer: [Swell Games LLC]()
Last updated: 15th October 2023 | Genre: Entertainment, Adventure | Developer: Swell Games LLC