# Hmmsim vs SenSim

The clearest difference is rating: SenSim at 4.3 against Hmmsim's 3.8. SenSim also leads on update cadence (every 2 months vs every 5 months). Hmmsim's advantage is ads (none vs shown) and monetization model (free vs ad-supported). On price, review sentiment, 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.

SenSim holds the better App Store score, 4.3 against 3.8. Both are backed by a comparable volume of ratings — 168 and 36 respectively. Written reviews complicate that: 70% of Hmmsim's written reviews are positive against 67% of SenSim'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, SenSim every 2 months. The most recent releases landed on September 24, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | Hmmsim | SenSim |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.8 (168 ratings)](https://appshunter.io/ios/app/hmmsim-train-simulator/id863234164/reviews) | **[4.3 (36 ratings)](https://appshunter.io/ios/app/sensim-train-simulator/id1390241909/reviews)** |
| Number of ratings | **168** | 36 |
| Positive reviews | **69.8% of reviews** | 67.3% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 5 months | **Every 2 months** |
| Monetization | **Free** | Ad-supported |
| Size | 211 MB | 207 MB |
| Requires iOS | **7.0** | 10.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Jemin Hwang](https://appshunter.io/developer/863234167) | [Hisashi Tsukui](https://appshunter.io/developer/1390241908) |

## 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


### SenSim

[App page](https://appshunter.io/ios/app/sensim-train-simulator/id1390241909)

Experience realistic train driving with a focus on precision. Control speed, time, and stopping points to simulate actual train operations. This simulation prioritizes authenticity over dramatic events.

**Highlights:** Realistic train driving simulation, Focus on speed, time, and stop position, Authentic operational experience, No flashy accidents or crashes, External route data available

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Hmmsim free?

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

### Is SenSim free?

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

### Which has better reviews, Hmmsim or SenSim?

SenSim is rated higher. Hmmsim averages 3.8 out of 5 from 168 ratings, while SenSim averages 4.3 from 36 ratings.

### Do Hmmsim or SenSim have ads?

SenSim shows ads; Hmmsim does not.

### Which is updated more often, Hmmsim or SenSim?

Hmmsim ships an update every 5 months, and SenSim every 2 months. Most recently, Hmmsim was updated on September 24, 2026 and SenSim 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.*