Comparison

20000 Cogs under the Sea vs TrainClicker Idle Evolution

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

Head to head
About

20000 Cogs under the Sea

Build an underwater steampunk factory, connecting cogwheels for efficient idle gameplay. Explore the seabed, manage unique creatures, and upgrade contraptions to become a sea tycoon. This incremental game features offline play and rewarded ads.

Highlights
  • Build and expand underwater factories
  • Connect cogwheels for efficient production
  • Idle gameplay with offline progress
  • Discover and upgrade mad science contraptions
  • Employ unique sea creatures and machines
  • Explore and expand playable area
Features
Read full description

Start your awesome underwater steampunk adventure. Build underwater factory, connect the cogwheels for the most efficient work in the idle game mode. Tap volcanoes for oxygen, drill the seabed and mine the ore. Employ octopuses and whales, explore the world with mechanical crabs, fish and submarines! Even the squirrels will help you, if you supply them with oxygen. Upgrade your incredible contraptions to become the ultimate sea tycoon. Features of this addictive incremental idle game - Various mad science contraptions, which can be connected in multiple fun ways - You start in a small research station at the bottom of an ocean, but then you expand down, up, left and right - Tutorial gives you the basic concepts, but to ultimately succeed you must be a real researcher and uncover hidden gameplay mechanics - Engines will work while you are away, producing you idle cash - Big community in facebook: share your creation to 7500 group members - Contains only rewarded ads, which are launched by the player to increase earnings - Works in offline mode without internet connection - Receive your daily reward by catching a FB submarine This is the fifth, Underwater, world of Steampunk Idle Spinner series. The first version of idle game with spinning cogwheels was made in June 2017 during a 3-days gamejam. As the concept proved to be interesting for the players, the development continued. The development of the game is screencast and then published as 1:60 timelapse video. Some development phases are broadcast to the players as live videos and often the players' suggestions are implemented online. The Underwater world was the most demanded, according to the players' vote in the game's facebook group. This world introduces many new concepts unique to the series. They are: - Reworked game engine with "pins" concept, which let design even the most bizarre machines interactions; - Resources production chains. Money is produced from air, various gases can be combined to create new substances; - Playable area expansion. Sideways expansion is performed with clockwork crabs and submarines, upwards expansion: with main base upgrades and downwards: by drilling the seabed; - Wide usage of taps together with spins for interaction with machines; - New objects are not only bought, but also discovered (treasure chests, more underwater volcanoes, ore deposits); - Machines purchase interface is the most convenient here. Players continue giving new suggestions, which eventually appear in the game. Available machines and entities: - Underwater volcano - produces oxygen or other gases - Cog 2:1 - increases rotating speed - Hammer - automatically hits the attached machines - Clockwork engine - spins the cog it while you are away - Tap accumulator - stores your taps and transmits them to the coins - Bubble duplicator - duplicates the bubbles - Clockwork crab - discovers new territories for you - Drill - as you spin it, drills down, finds the deposits of ore and produces coins - Mechanical fish - transports resources to your base - Octopus - extracts tentacles and spins cogs - Air pipe - transports air - Whale attractor - emits infrasound, which attracts whales - Squirrel wheel - powerful engine, when fed with air bubbles - Water filter - filters gold from the water - Gas mixer - mixes air with the red gas and produces green gas - Base booster - gathers red or green gas and boosts your base - Treasure lootbox - you'll find it occasionally on a seabed. Tap it do get some gold - Submarines factory - floats in the water, as you spin its cog, will produce Scout submarines - Scout submarine - expands your visible aquatory

About

TrainClicker Idle Evolution

Embark on a relaxing idle adventure where you tap to move trains, unlock engineers, and upgrade your engines. Travel through beautiful zones, gather gold, and progress through unique themed levels in this one-of-a-kind clicker game.

Highlights
  • Idle clicker gameplay
  • Train engine upgrades
  • Unlockable engineers
  • Day-night cycle
  • Multiple train cars and engines
  • Unique themed levels
Features
Read full description

Build, upgrade, automate, and evolve your own idle railway empire in Train Clicker Idle Evolution! Start with humble carts and grow your train into a powerful railway machine with steam engines, diesel locomotives, cargo cars, passenger cars, and more. Tap to move your train, earn gold, collect rewards, unlock engineers, run factories, and keep progressing through beautiful worlds. Train Clicker Idle Evolution combines idle clicker gameplay, train upgrades, factory automation, railway tycoon progression, and relaxing adventure into one unique train game. Whether you enjoy tapping, upgrading, collecting, automating production, or watching your railway grow over time, there is always something new to unlock. Features: • Tap to move your train and earn rewards • Upgrade from simple carts to powerful engines • Build long trains with multiple engines and cars • Run factories and produce valuable resources • Automate your railway empire with production systems • Unlock unique engineer characters • Use engineer skills to boost your progress • Collect train skins and customize your railway • Travel through beautiful zones and themed worlds • Earn gold, experience, and idle rewards • Progress through levels, upgrades, factories, and new train evolutions Your railway journey starts small, but every upgrade, factory, and engineer brings you closer to building the ultimate train empire. All aboard! Evolve your train and become a railway tycoon!

Screenshots

20000 Cogs under the Sea4 screens
TrainClicker Idle Evolution4 screens

Verdict

The call

The clearest difference is review sentiment: 20000 Cogs under the Sea at 100% against TrainClicker Idle Evolution's 53%. 20000 Cogs under the Sea also leads on rating (4.9 vs 4.4) and iOS requirement (11.0 vs 15.0). TrainClicker Idle Evolution's advantage is ads (none vs shown) and ratings volume (482 vs 21). On price, in-app purchases, monetization model 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. 20000 Cogs under the Sea sells 6 one-off in-app purchases and TrainClicker Idle Evolution sells 13 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

20000 Cogs under the Sea holds the better App Store score, 4.9 against 4.4. That said, the two scores are not equally well evidenced: TrainClicker Idle Evolution has 482 ratings behind it against 21, so its average is the more settled of the two. Written reviews point the same way: 100% of 20000 Cogs under the Sea's written reviews are positive against 53% of TrainClicker Idle Evolution's.

UpkeepUpdate frequency

20000 Cogs under the Sea ships an update fortnightly, TrainClicker Idle Evolution weekly. Both last shipped on October 24, 2026.

Scorecard6 real differences · 4 level
20000 Cogs under the Sea versus TrainClicker Idle Evolution: the parameters behind the verdict, then further details
Parameter20000 Cogs under the SeaTrainClicker Idle Evolution
PriceFreeFree
Rating4.9 (21 ratings) — better4.4 (482 ratings)
Positive reviews100.0% of reviews — better52.9% of reviews
Number of ratings21482 — better
Update frequencyFortnightlyWeekly — better
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS11.0 — better15.0
Further details — not scored
Size33 MB362 MB
Age rating4+4+
DeveloperAlexey IzvalovPixelRNG LLC

Customer experience

20000 Cogs under the Sea

All ratings20 ratings
Positive95.0%
Neutral5.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

TrainClicker Idle Evolution

All ratings482 ratings
Positive86.1%
Neutral5.0%
Negative8.9%
Written reviews17 reviews
Positive52.9%
Neutral17.6%
Negative29.4%

Bugs and requests

20000 Cogs under the Sea

Not enough reviews yet to summarise bugs or requests.

TrainClicker Idle Evolution

Reported bugs

5 issues
  • No prize after beating levels multiple times
  • Purchased coins not appearing
  • Game glitched, lost progress
  • Major bug with gold calculation (negative balance)
  • Bug where train could go very fast (now patched)

Requested features

5 requests
  • Add a button for continuous tapping
  • Improve train customization (cart order, naming)
  • Make the game more idle-friendly
  • Fix progression impediments like engine upgrade waits
  • Reintroduce or offer a speed-focused version

In-app purchases

6 purchases

20000 Cogs under the Sea

One-time6
  • Hammer power x2$1.99
  • Exploration speed x2$2.99
  • No Ads + everything 2x cheaper$2.99
Show 3 more
  • Coins production x2$4.99
  • Volcano efficiency x2$5.99
  • Narrativium generation x2$9.99
13 purchases

TrainClicker Idle Evolution

One-time13
  • Handful of Gems$0.99
  • Special Deal$4.99
  • Pile of Gems$4.99
Show 10 more
  • Remove Ads$4.99
  • Booster Bundle$4.99
  • 2026 Goal Skin Bundle$6.99
  • Remove Ads And More$6.99
  • Bag of Gems$9.99
  • Overdrive Vault$9.99
  • Crate of Gems$19.99
  • Booster Max$19.99
  • Box of Gems$49.99
  • Chest of Gems$99.99

Questions

Is 20000 Cogs under the Sea free?
20000 Cogs under the Sea is free to download, with in-app purchases available.
Is TrainClicker Idle Evolution free?
TrainClicker Idle Evolution is free to download, with in-app purchases available.
Which has better reviews, 20000 Cogs under the Sea or TrainClicker Idle Evolution?
20000 Cogs under the Sea is rated higher. 20000 Cogs under the Sea averages 4.9 out of 5 from 21 ratings, while TrainClicker Idle Evolution averages 4.4 from 482 ratings.
Do 20000 Cogs under the Sea or TrainClicker Idle Evolution have ads?
20000 Cogs under the Sea shows ads; TrainClicker Idle Evolution does not.
Which is updated more often, 20000 Cogs under the Sea or TrainClicker Idle Evolution?
20000 Cogs under the Sea ships an update fortnightly, and TrainClicker Idle Evolution weekly. Most recently, 20000 Cogs under the Sea was updated on October 24, 2026 and TrainClicker Idle Evolution on October 24, 2026.

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