Open Lap vs SubZone
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Open Lap
Manage your slot car races with this app, offering practice, qualifying, and race modes. Customize car settings, track intermediate times, and receive voice alerts for events like low fuel. Supports Carrera DIGITAL 124/132 systems.
- Race management modes (practice, qualifying, race)
- Individual car settings (speed, brake, fuel)
- Intermediate/sector time tracking
- Personalized voice alerts
- Pace car and yellow flag control
- Bluetooth connectivity via Carrera AppConnect
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Open Lap is a simple, no-nonsense slot car race management app for Carrera® DIGITAL 124/132 systems. In a nutshell, Open Lap lets you - connect your mobile device via Bluetooth using Carrera AppConnect®, or a suitable serial to USB On-The-Go adapter cable. - take it easy during free practice, go for fastest lap in qualifying, or compete in lap or time based race sessions. - get informed about important events, such as fastest laps or low fuel conditions, by personalized voice messages. - adjust vehicle speed, brake force and fuel tank size for each car individually. - measure up to three intermediate or sector times (S1, S2, S3) using Carrera® Check Lane or compatible equipment. - send out the pace car in case of emergency, or temporarily disable lap counting during a "yellow flag" phase. Some features, such as the start light and pace car buttons, will require Carrera® Control Unit firmware version 3.31 or higher. Carrera® Check Lane support generally requires at least firmware version 3.36.
SubZone
Optimize your subwoofer's placement for superior sound quality. This app uses advanced acoustic simulations to find the ideal spot in your room, eliminating boomy or weak bass. Achieve clear, deep bass for music and movies scientifically and affordably.
- Rectangular room support
- Acoustic simulation
- Zone performance scoring
- Optimum zone recommendation
- Frequency response plotting
- Multiple listening position optimization
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Experience unparalleled sound quality with SubZone - the ultimate app for optimizing your subwoofer's position. Simply enter the details of your room and listening position, and our advanced acoustic simulation will find the sweet spot. The result is clear, well-defined, deep bass that brings the very best out of music and movies. When sound waves reflect off the walls, ceiling, and floor of a room they produce "room modes". These affect the sound by boosting or cutting certain frequencies, making some sound too boomy and others not present enough. To get the best performance out of your subwoofer, it is important to position it in a location that minimizes the effect of room modes. Previously, finding the best place to put a subwoofer has involved trial-and-error or expensive acoustic software. Some even suggest crawling around on your hands and knees to listen for the best spot. Now, SubZone allows you to calculate the optimal position in a scientific and affordable way from the comfort of your seat. Key features: - Supports any rectangular-shaped room - Simulates the acoustic effect of placing your subwoofer in each possible zone of your room - Calculates a score out of 10 for how well each zone performs - Recommends the optimum zones, marked with a star - Plots the frequency response for each zone, showing which frequencies are boosted/cut and by how much - Can optimize to a specified frequency range - Supports optimization for multiple listening positions - Uses information about the construction materials of the room to improve the accuracy of the simulation - Simple interface with step-by-step guide - No account or sign-in required - Respects your privacy by storing data locally - Detailed documentation with a comprehensive FAQ - Expert support on-hand to handle any questions or issues - Dark and light color schemes - Complies with GDPR legislation
Screenshots
Verdict
The clearest difference is price: Open Lap at Free against SubZone's $4.99. Open Lap also leads on rating (5.0 vs 4.5) and review sentiment (100% vs 80%). SubZone's advantage is update cadence (every 5 weeks vs every 13 months) and ratings volume (22 vs 4). On ads, 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
Open Lap is free to download; SubZone costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Open Lap holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: SubZone has 22 ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 100% of Open Lap's written reviews are positive against 80% of SubZone's.
Open Lap ships an update every 13 months, SubZone every 5 weeks. The most recent releases landed on June 1, 2026 and September 9, 2026 respectively.
| Parameter | Open Lap | SubZone |
|---|---|---|
| Price | Free — better | $4.99 |
| Rating | 5.0 (4 ratings) — better | 4.5 (22 ratings) |
| Positive reviews | 100.0% of reviews — better | 80.0% of reviews |
| Number of ratings | 4 | 22 — better |
| Update frequency | Every 13 months | Every 5 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Paid |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 11.0 — better | 13.4 |
| Further details — not scored | ||
| Size | 23 MB | 22 MB |
| Age rating | 4+ | 4+ |
| Developer | Philipp Anné | Sonic Baume LTD |
Customer experience
Open Lap
SubZone
In-app purchases
Open Lap
No in-app purchases
SubZone
No in-app purchases









