Comparison

Open Lap vs SubZone

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • 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
Features
Read full description

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.

About

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.

Highlights
  • Rectangular room support
  • Acoustic simulation
  • Zone performance scoring
  • Optimum zone recommendation
  • Frequency response plotting
  • Multiple listening position optimization
Features
Read full description

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

Open Lap1 screens
SubZone4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard7 real differences · 3 level
Open Lap versus SubZone: the parameters behind the verdict, then further details
ParameterOpen LapSubZone
PriceFree — better$4.99
Rating5.0 (4 ratings) — better4.5 (22 ratings)
Positive reviews100.0% of reviews — better80.0% of reviews
Number of ratings422 — better
Update frequencyEvery 13 monthsEvery 5 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree — betterPaid
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS11.0 — better13.4
Further details — not scored
Size23 MB22 MB
Age rating4+4+
DeveloperPhilipp AnnéSonic Baume LTD

Customer experience

Open Lap

All ratings4 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

SubZone

All ratings22 ratings
Positive90.9%
Neutral0.0%
Negative9.1%
Written reviews5 reviews
Positive80.0%
Neutral0.0%
Negative20.0%

In-app purchases

None

Open Lap

No in-app purchases

None

SubZone

No in-app purchases

Questions

Is Open Lap free?
Open Lap is free to download, with no in-app purchases.
Is SubZone free?
SubZone costs $4.99, with no in-app purchases.
Which has better reviews, Open Lap or SubZone?
Open Lap is rated higher. Open Lap averages 5.0 out of 5 from 4 ratings, while SubZone averages 4.5 from 22 ratings.
Do Open Lap or SubZone have ads?
Neither Open Lap nor SubZone shows ads.
Which is updated more often, Open Lap or SubZone?
Open Lap ships an update every 13 months, and SubZone every 5 weeks. Most recently, Open Lap was updated on June 1, 2026 and SubZone on September 9, 2026.

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