Comparison

Monster Evolution vs Rio Rex

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

Head to head
About

Monster Evolution

Control a giant, evolved monster and unleash destruction on everything in sight. Tear down buildings, crush vehicles, and flatten landscapes in this realistic demolition simulator. Upgrade your monster and unlock new abilities to become an unstoppable force.

Highlights
  • Over 10 playable monsters
  • Realistic destruction physics
  • Stunning 3D graphics
  • Unique and challenging levels
  • Immersive monster sounds
  • Addictive gameplay
  • Physics-based destruction model
Features
Read full description

Get ready for destruction, chaos, and mayhem in Monster Evolution: Hit and Smash! Take on the role of a giant monster who has evolved to massive proportions and wreaks havoc on everything in its path. Key features include: - Over 10 playable monsters - Realistic destruction physics - Stunning 3D graphics - Unique and challenging levels - Immersive monster sounds and background music - Addictive gameplay The origin of this monstrous creature is unknown, but it continues to grow stronger with each passing day. Unleash its rage and become an unstoppable force, tearing down buildings, crushing cars, and flattening trees in a realistic demolition simulator. Is it a dinosaur from the Jurassic era, a dragon, or an extraterrestrial hunter? You decide. What's certain is that it looks more epic than any other dinosaur in all known dinosaur games. The game uses a physics-based destruction model, making it fun and satisfying to destroy objects. Everything is up for grabs, including cars, houses, trees, ships, gas stations, cranes, and even spaceships. Choose from several modes of play, including a special free play mode. Complete quests to unlock new levels, or earn resources in free play to upgrade your monster and possibly even unlock new ones. Check for updates regularly for new locations, modes, monsters, and more. Are you ready to wreak havoc? Let the destruction begin!- More than 10 playable monsters - Realistic physics of destruction - Modern and beautiful 3D graphics - Lots of unique game levels - Detailed and realistic monster sounds and background music - Unique and interesting game play Where this monster came from is probably not clear, but now it is evolving and becoming stronger and stronger every day. Evolution is not in vain - the dinosaur monster has added a new destructive power to its huge arsenal. Turn on the RAGE and become an invincible aggressive force, destroying everything on its path! Demolish buildings, smash houses to pieces with an epic monster in a real demolition simulator! Whom, in fact, is this incredible monster decide for yourself. Perhaps this is a dinosaur of the Jurassic period, perhaps a dragon, or an alien hunter. Whom he was not - he looks very epic, more epic than any dinosaur of all known dinosaur games. The game uses a realistic physical model of destruction, so it's very interesting and effective to destroy buildings and other objects! Absolutely everything that can be encountered can be destroyed - cars, houses, trees, ships, gas stations, freight cranes, SPACE SHIPS and much more. There are several ways to play – including special FREE play mode. Go through the quests to open more levels or play on free mode to earn more resources – it’s your choice! You will need these resources to increase the power of your monster, and maybe even open new ones. Maybe you could even change appearance of the dinosaur one day, who knows! Don’t forget to check for updates – new locations, new modes, new monsters and many interesting things! Are you ready? Let’s destroy, smash and break!

About

Rio Rex

Control a terrifying T-Rex rampaging through the streets of Rio, destroying buildings and feasting on humans. Unleash flaming breath and cause mayhem in this action-packed arcade game.

Highlights
  • Control a T-Rex
  • Destroy city buildings
  • Feast on humans
  • Use flaming breath
  • Arcade gameplay
  • Cause mayhem
Features
Read full description

The terrifying T-Rex has returned to bring destruction to yet another city. In this thrilling new action game, Rio Rex, you feast on humans while you level the lovely city of Rio to the ground. Your goal is to roast all humans with your flaming breath and to leave none of them uneaten. Feel free to take the rest of the city down with them! Rio Rex is the rampaging arcade game in which you can run riot controlling a huge T-Rex! Run through the towns and settlements destroying everything in sight and causing havoc among the little humans in your way. This time you are let loose in the beautiful Rio but take a look back at the previous cities that have been destroyed at New York and Paris It is time again to chew people, destroy cities and blow your horrifying fire breathe at everything in sight. Go cause mayhem and destruction because why not! Have fun!

Screenshots

Monster Evolution4 screens
Rio Rex2 screens

Verdict

The call

The clearest difference is ads: Rio Rex at none against Monster Evolution's shown. Rio Rex also leads on iOS requirement (9.0 vs 15.0). Monster Evolution's advantage is rating (4.6 vs 4.1) and update cadence (every 2 months vs every 11 months). On price, review sentiment, in-app purchases and monetization model 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. Monster Evolution sells 19 one-off in-app purchases and Rio Rex sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Monster Evolution holds the better App Store score, 4.6 against 4.1. That said, the two scores are not equally well evidenced: Monster Evolution has 5.8K ratings behind it against 50, so its average is the more settled of the two. Written reviews point the same way: 77% of Monster Evolution's written reviews are positive against 74% of Rio Rex's.

UpkeepUpdate frequency

Monster Evolution ships an update every 2 months, Rio Rex every 11 months. Both last shipped on October 24, 2026.

Scorecard5 real differences · 5 level
Monster Evolution versus Rio Rex: the parameters behind the verdict, then further details
ParameterMonster EvolutionRio Rex
PriceFreeFree
Rating4.6 (5.8K ratings) — better4.1 (50 ratings)
Positive reviews77.0% of reviews — better73.7% of reviews
Number of ratings5.8K — better50
Update frequencyEvery 2 months — betterEvery 11 months
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.09.0 — better
Further details — not scored
Size413 MB434 MB
Age rating9+12+
DeveloperAnton Slyusargametornado

Customer experience

Monster Evolution

All ratings5,829 ratings
Positive90.5%
Neutral3.9%
Negative5.6%
Written reviews256 reviews
Positive77.0%
Neutral5.5%
Negative17.6%

Rio Rex

All ratings50 ratings
Positive78.0%
Neutral4.0%
Negative18.0%
Written reviews19 reviews
Positive73.7%
Neutral5.3%
Negative21.1%

Bugs and requests

Monster Evolution

Reported bugs

3 issues
  • Inability to exit levels or return to menu
  • Inconsistent sound and music playback
  • Progression loss after crashes or updates

Requested features

4 requests
  • Multiplayer mode with PvP battles
  • More monster variety including classic Kaiju
  • Ability to control monster movement
  • Larger and more diverse city environments

Rio Rex

Not enough reviews yet to summarise bugs or requests.

In-app purchases

19 purchases

Monster Evolution

One-time19
  • Special Offer$0.99
  • 1000 Radiation$1.99
  • Mutagen 2000$1.99
Show 16 more
  • No ADS$2.99
  • New monster$3.99
  • New monster$5.99
  • 4000 Radiation$6.99
  • Mutagen 8000$6.99
  • New monster$7.99
  • New monster$9.99
  • Limited time offer$10.99
  • Firebreath$11.99
  • Laserbot$11.99
  • Items Meteor$11.99
  • New monster$12.99
  • 10000 Radiation$13.99
  • 25000 Radiation$24.99
  • Mutagen 50000$24.99
  • 4 new monsters$30.99
1 purchases

Rio Rex

One-time1
  • premium user$0.99

Questions

Is Monster Evolution free?
Monster Evolution is free to download, with in-app purchases available.
Is Rio Rex free?
Rio Rex is free to download, with in-app purchases available.
Which has better reviews, Monster Evolution or Rio Rex?
Monster Evolution is rated higher. Monster Evolution averages 4.6 out of 5 from 5.8K ratings, while Rio Rex averages 4.1 from 50 ratings.
Do Monster Evolution or Rio Rex have ads?
Monster Evolution shows ads; Rio Rex does not.
Which is updated more often, Monster Evolution or Rio Rex?
Monster Evolution ships an update every 2 months, and Rio Rex every 11 months. Most recently, Monster Evolution was updated on October 24, 2026 and Rio Rex on October 24, 2026.

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