Hmmsim Legacy vs SenSim
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Hmmsim Legacy
Experience realistic train simulation with advanced graphics and new features. Drive on detailed subway routes and operate trains with dynamic elements. Expand your gameplay by adding custom content from PC simulators.
- Advanced graphics
- New map and outer view
- Dynamic trains
- Scoring mode
- BVE Add-On operation upgrade
- Seoul Subway Line 2 & 7 routes
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Hmmsim 2 has been reborn with Unreal Engine. With dynamic sky, shadows, and headlight effects, it delivers more realistic scenery and atmosphere. Hmmsim Legacy includes built-in routes based on Seoul Subway Lines 2 and 7, recreated with top-quality graphics. Experience subway operations firsthand. In addition, Hmmsim Legacy supports BVE Trainsim Add-Ons. You can enjoy the same BVE routes you played on PC directly on mobile devices. Expand your experience endlessly with Add-Ons tailored to your preferences.
SenSim
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.
- Realistic train driving simulation
- Focus on speed, time, and stop position
- Authentic operational experience
- No flashy accidents or crashes
- External route data available
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Realistic train driving simulator. Let's drive well with paying attention to speed, time and stop position.. This game is pursuing reality. There is no flashy accident, crash, derailment. If you like more routes, Please use external data via our website.
Screenshots
Verdict
The clearest difference is price: SenSim at Free against Hmmsim Legacy's $1.99. SenSim also leads on iOS requirement (10.0 vs 17.0). Hmmsim Legacy's advantage is ads (none vs shown) and rating (4.5 vs 4.2). On ratings volume, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
SenSim is free to download; Hmmsim Legacy costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Hmmsim Legacy holds the better App Store score, 4.5 against 4.2. Both are backed by a comparable volume of ratings — 109 and 38 respectively. Written reviews point the same way: 77% of Hmmsim Legacy's written reviews are positive against 67% of SenSim's.
Hmmsim Legacy ships an update fortnightly, SenSim every 2 months. Both last shipped on November 6, 2026.
| Parameter | Hmmsim Legacy | SenSim |
|---|---|---|
| Price | $1.99 | Free — better |
| Rating | 4.5 (109 ratings) — better | 4.2 (38 ratings) |
| Positive reviews | 76.6% of reviews — better | 67.3% of reviews |
| Number of ratings | 109 — better | 38 |
| Update frequency | Fortnightly — better | Every 2 months |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Free — better | Ad-supported |
| Best chart rank | #84 — better | — |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 17.0 | 10.0 — better |
| Further details — not scored | ||
| Size | 359 MB | 207 MB |
| Age rating | 4+ | 4+ |
| Developer | Jemin Hwang | Hisashi Tsukui |
Customer experience
Hmmsim Legacy
SenSim
Bugs and requests
Hmmsim Legacy
Reported bugs
12 issues- Cannot download MTA routes on iPhone
- Routes fail to appear after app restart on iOS
- Add-ons not loading properly on iOS devices
- Transparency issues in converted BVE routes
- Ground clipping through tracks on some routes
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- Signals displaying as oversized rectangles
- Audio missing on some devices
- App crashes and freezes
- Not optimized for iPhone X and later
- Routes not appearing in app despite successful download
- Interac e-transfer payment issues and 24-hour delays
- Inconsistent language display (Korean/English mix)
Requested features
20 requests- Add more Seoul subway lines (Lines 1, 3, 4, 5, 6, 8, 9)
- Implement passenger boarding/alighting simulation
- Add interior cabin view with controls
- Include platform screen doors
- Add express service routes
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- Implement working signal systems
- Add round-trip functionality
- Include AI traffic on opposite tracks
- Add night mode and different times of day
- Implement in-app route/add-on shop or marketplace
- Add multiplayer functionality
- Expand to other city metro systems (London, Tokyo, Hong Kong, NYC, DC Metro, Chicago CTA)
- Add game controller/Backbone support
- Simplify add-on installation for iOS
- Include more train varieties
- Add career mode
- Implement realistic lighting
- Add trainspotting mode
- Include more outdoor/elevated track routes
- Add station design improvements
SenSim
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Hmmsim Legacy
No in-app purchases
SenSim
No in-app purchases
Questions
Is Hmmsim Legacy free?
Is SenSim free?
Which has better reviews, Hmmsim Legacy or SenSim?
Do Hmmsim Legacy or SenSim have ads?
Which is updated more often, Hmmsim Legacy or SenSim?
Other comparisons
