# THUNDON'S TRAIN vs Invaders Retro

The clearest difference is update cadence: Invaders Retro at weekly against THUNDON'S TRAIN's every 19 months. Invaders Retro also leads on device support (4 vs 2). THUNDON'S TRAIN's advantage is iOS requirement (11.0 vs 14.2). On price, ads and in-app purchases there is nothing between them.

THUNDON'S TRAIN costs $0.99 and Invaders Retro $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

THUNDON'S TRAIN ships an update every 19 months, Invaders Retro weekly. The most recent releases landed on September 30, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | THUNDON'S TRAIN | Invaders Retro |
| --- | --- | --- |
| Price | $0.99 | $0.99 |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 19 months | **Weekly** |
| Monetization | — | Paid |
| Size | 43 MB | 3 MB |
| Requires iOS | **11.0** | 14.2 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Hideki Kubo](https://appshunter.io/developer/1512674908) | [Justin Ngan](https://appshunter.io/developer/1467305957) |

## What reviewers say

### THUNDON'S TRAIN

[App page](https://appshunter.io/ios/app/thundons-train/id1514893446)

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

**In-app purchases:** none


### Invaders Retro

[App page](https://appshunter.io/ios/app/invaders-retro/id1544672448)

Defend Earth from relentless alien waves in this retro-inspired shooter. Discover hidden scoring mechanics as you battle through increasingly challenging levels to save the planet.

**Highlights:** Alien invasion gameplay, Wave-based challenges, Hidden scoring system, Retro graphics, Planet defense

**Features:** Game Controller support

**In-app purchases:** none


## Frequently asked questions

### Is THUNDON'S TRAIN free?

THUNDON'S TRAIN costs $0.99, with no in-app purchases.

### Is Invaders Retro free?

Invaders Retro costs $0.99, with no in-app purchases.

### Do THUNDON'S TRAIN or Invaders Retro have ads?

Neither THUNDON'S TRAIN nor Invaders Retro shows ads.

### Which is updated more often, THUNDON'S TRAIN or Invaders Retro?

THUNDON'S TRAIN ships an update every 19 months, and Invaders Retro weekly. Most recently, THUNDON'S TRAIN was updated on September 30, 2026 and Invaders Retro on September 25, 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.*