# Hmmsim vs Bus Simulator 3D Big City

The clearest difference is rating: Bus Simulator 3D Big City at 4.5 against Hmmsim's 3.7. Hmmsim's advantage is ads (none vs shown) and ratings volume (170 vs 13). On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Bus Simulator 3D Big City holds the better App Store score, 4.5 against 3.7. That said, the two scores are not equally well evidenced: Hmmsim has 170 ratings behind it against 13, so its average is the more settled of the two. Written reviews complicate that: 70% of Hmmsim's written reviews are positive against 57% of Bus Simulator 3D Big City's, so the app with the better star average is not the one people write more warmly about.

Hmmsim ships an update every 5 months, Bus Simulator 3D Big City every 6 months. Both last shipped on November 1, 2026.

## The numbers

| Metric | Hmmsim | Bus Simulator 3D Big City |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.7 (170 ratings)](https://appshunter.io/ios/app/hmmsim-train-simulator/id863234164/reviews) | **[4.5 (13 ratings)](https://appshunter.io/ios/app/bus-simulator-3d-big-city/id1141307525/reviews)** |
| Number of ratings | **170** | 13 |
| Positive reviews | **69.8% of reviews** | 56.9% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 5 months** | Every 6 months |
| Monetization | **Free** | Ad-supported |
| Size | 211 MB | 459 MB |
| Requires iOS | **7.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Jemin Hwang](https://appshunter.io/developer/863234167) | [Oleg Andreev](https://appshunter.io/developer/895536878) |

## What reviewers say

### Hmmsim

[App page](https://appshunter.io/ios/app/hmmsim-train-simulator/id863234164)

Experience realistic train operations on a mobile platform. This simulator offers high-quality graphics and allows users to play PC-based add-ons, providing endless route possibilities.

**Highlights:** Realistic metro operation, High-level graphics, BVE Trainsim add-on support, Infinite add-on customization, Seoulmetro Line 2 route

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

**In-app purchases:** none

**What reviewers like**

- 👍 Great graphics
- 🚀 Realistic sounds and movement
- 💡 Ability to add BVE addons
- 🔒 Detailed and polished app

**What reviewers complain about**

- 🐛 Crashes and freezes
- 🔋 Difficulty adding routes
- 💡 Need for more camera views
- 💡 Lack of passenger/other train features

**Reported bugs**

- Play button not working
- Incompatibility with older devices
- Incorrect speed limit warnings

**Requested features**

- More routes and lines
- Ability to select different trains
- Scoring system based on timetable
- In-app route/addon downloads
- Loop the track for longer gameplay


### Bus Simulator 3D Big City

[App page](https://appshunter.io/ios/app/bus-simulator-3d-big-city/id1141307525)

Experience realistic bus driving in a bustling city. Navigate diverse routes with various bus types, realistic traffic, and detailed graphics. Master smooth controls and physics to become the ultimate city bus driver.

**Highlights:** 12 unique buses, Realistic passengers and traffic, Detailed city maps and routes, Multiple control options, 3D graphics and physics engine, Damage and refueling systems

**In-app purchases:** none


## Frequently asked questions

### Is Hmmsim free?

Hmmsim is free to download, with no in-app purchases.

### Is Bus Simulator 3D Big City free?

Bus Simulator 3D Big City is free to download, with no in-app purchases.

### Which has better reviews, Hmmsim or Bus Simulator 3D Big City?

Bus Simulator 3D Big City is rated higher. Hmmsim averages 3.7 out of 5 from 170 ratings, while Bus Simulator 3D Big City averages 4.5 from 13 ratings.

### Do Hmmsim or Bus Simulator 3D Big City have ads?

Bus Simulator 3D Big City shows ads; Hmmsim does not.

### Which is updated more often, Hmmsim or Bus Simulator 3D Big City?

Hmmsim ships an update every 5 months, and Bus Simulator 3D Big City every 6 months. Most recently, Hmmsim was updated on November 1, 2026 and Bus Simulator 3D Big City on November 1, 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.*