# 20000 Cogs under the Sea vs TrainClicker Idle Evolution

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.

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.

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.

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

## The numbers

| Metric | 20000 Cogs under the Sea | TrainClicker Idle Evolution |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (21 ratings)](https://appshunter.io/ios/app/20000-cogs-under-the-sea/id1441246412/reviews)** | [4.4 (482 ratings)](https://appshunter.io/ios/app/trainclicker-idle-evolution/id1549726315/reviews) |
| Number of ratings | 21 | **482** |
| Positive reviews | **100.0% of reviews** | 52.9% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Fortnightly | **Weekly** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 33 MB | 362 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Alexey Izvalov](https://appshunter.io/developer/1437172357) | [PixelRNG LLC](https://appshunter.io/developer/953256364) |

## What reviewers say

### 20000 Cogs under the Sea

[App page](https://appshunter.io/ios/app/20000-cogs-under-the-sea/id1441246412)

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:** macOS Compatibility, Vision Pro support

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Hammer power x2 | $1.99 | one-time |
| Exploration speed x2 | $2.99 | one-time |
| No Ads + everything 2x cheaper | $2.99 | one-time |
| Coins production x2 | $4.99 | one-time |
| Volcano efficiency x2 | $5.99 | one-time |
| Narrativium generation x2 | $9.99 | one-time |


### TrainClicker Idle Evolution

[App page](https://appshunter.io/ios/app/trainclicker-idle-evolution/id1549726315)

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:** macOS Compatibility, Vision Pro support

**In-app purchases (13)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Handful of Gems | $0.99 | one-time |
| Special Deal | $4.99 | one-time |
| Pile of Gems | $4.99 | one-time |
| Remove Ads | $4.99 | one-time |
| Booster Bundle | $4.99 | one-time |
| 2026 Goal Skin Bundle | $6.99 | one-time |
| Remove Ads And More | $6.99 | one-time |
| Bag of Gems | $9.99 | one-time |
| Overdrive Vault | $9.99 | one-time |
| Crate of Gems | $19.99 | one-time |
| Booster Max | $19.99 | one-time |
| Box of Gems | $49.99 | one-time |
| Chest of Gems | $99.99 | one-time |

**What reviewers like**

- 👍 Fun and engaging gameplay
- 💡 Unique "train clicker" concept
- 🚀 Game has potential
- 👍 Enjoyable for train enthusiasts

**What reviewers complain about**

- 😩 Constant tapping is tiring
- ⏳ Extremely long grind for upgrades
- 🚫 Limited offline progress
- 📉 Progression is slow
- 🤔 Level system feels pointless

**Reported bugs**

- 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**

- 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


## Frequently asked 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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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*