# Atoms HD vs Train Snake

The clearest difference is rating: Train Snake at 5.0 against Atoms HD's 3.6. Train Snake also leads on update cadence (weekly vs every 64 months) and iOS requirement (7.0 vs 12.0). Atoms HD's advantage is review sentiment (54% vs 33%) and ratings volume (19 vs 1). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Atoms HD sells 7 one-off in-app purchases and Train Snake sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Train Snake holds the better App Store score, 5.0 against 3.6. That said, the two scores are not equally well evidenced: Atoms HD has 19 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 54% of Atoms HD's written reviews are positive against 33% of Train Snake's, so the app with the better star average is not the one people write more warmly about.

Atoms HD ships an update every 64 months, Train Snake weekly. The most recent releases landed on October 16, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Atoms HD | Train Snake |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.6 (19 ratings)](https://appshunter.io/ios/app/atoms-hd/id888626368/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/train-snake/id1012310252/reviews)** |
| Number of ratings | **19** | 1 |
| Positive reviews | **53.8% of reviews** | 33.3% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 64 months | **Weekly** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 31 MB | 72 MB |
| Requires iOS | 12.0 | **7.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Andrey Kulakov](https://appshunter.io/developer/653086422) | [MixedApps s.r.o.](https://appshunter.io/developer/845044442) |

## What reviewers say

### Atoms HD

[App page](https://appshunter.io/ios/app/atoms-hd/id888626368)

A logic puzzle game where players push atoms to form molecules, inspired by Atomix and Sokoban. Features HD graphics and 88 levels suitable for all ages.

**Highlights:** HD graphics, 88 levels, Simple rules, Molecule building, Atom pushing puzzles

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Ad Free Bundle | $0.99 | one-time |
| Atoms Items Bundle 2 | $0.99 | one-time |
| Atoms Items Bundle 3 | $0.99 | one-time |
| Atoms Items Bundle 4 | $0.99 | one-time |
| Atoms Items Bundle 1 | $1.99 | one-time |
| Atoms Items Bundle 5 | $2.99 | one-time |
| Atoms Items Bundle 6 | $3.99 | one-time |


### Train Snake

[App page](https://appshunter.io/ios/app/train-snake/id1012310252)

Navigate a classic retro snake-style game where you collect objects while avoiding your own train cars and walls. Reach the open gate to complete each level. Practice precision, reflexes, and logic.

**Highlights:** Classic retro snake gameplay, Collect all objects to open gate, Avoid own wagons and walls, Practice precision and logic, Touch gesture controls, 50 levels (20 free)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock all levels and remove ads | $0.99 | one-time |


## Frequently asked questions

### Is Atoms HD free?

Atoms HD is free to download, with in-app purchases available.

### Is Train Snake free?

Train Snake is free to download, with in-app purchases available.

### Which has better reviews, Atoms HD or Train Snake?

Train Snake is rated higher. Atoms HD averages 3.6 out of 5 from 19 ratings, while Train Snake averages 5.0 from 1 ratings.

### Do Atoms HD or Train Snake have ads?

Neither Atoms HD nor Train Snake shows ads.

### Which is updated more often, Atoms HD or Train Snake?

Atoms HD ships an update every 64 months, and Train Snake weekly. Most recently, Atoms HD was updated on October 16, 2026 and Train Snake on October 14, 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.*