Compression Calculator vs MSD Ultra 6AL
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Compression Calculator
Calculate engine compression, displacement, and piston speed using specific Honda engine parameters. Select engine components to get precise calculations for your automotive needs.
- Engine compression calculation
- Displacement calculation
- Piston speed calculation
- Honda B, D, H/F, K-Series engine support
- Component selection for custom calculations
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Engine Compression Calculator which contains B-, D-, H/F- and K-Series Honda™ Engine parameters. Select your engine components and calculate your engine compression, displacement, pistons speed...etc. The trademark "Honda" and any other product names, service names or logos of Honda used, quoted and/or referenced in this app are trademarks or registered trademarks of Honda or any of its affiliates. Other product names and/or company names used in the app may be protected as their trademarks and/or trade names.
MSD Ultra 6AL
This app provides intuitive control and adjustment for ignition systems. Easily manage cylinder configurations, set rev limits, and view real-time parameters. Diagnostic alerts help with troubleshooting.
- Bluetooth connectivity
- Cylinder selection
- Launch, Burnout & Max Rev Limit settings
- Step-Retard programming
- Diagnostic alerts
- Real-time parameter monitoring
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The MSD Ultra 6AL Series Ignition offers control and adjustment of familiar functions with its own user friendly, intuitive app. It has been designed with tabs to help users easily select and update cylinder configuration, Launch Rev Limits, Step Retards and view parameters in real time. Also available are diagnostic alerts to ease troubleshooting. App Features: Bluetooth connectivity via the MSD App. Cylinder Selection & Start Retard Programming 3-Step Rev Limit Settings (Launch, Burnout & Max) Launch Latch Setting Step-Retard Settings Custom Monitors Diagnostic Alerts
Screenshots
Verdict
The clearest difference is review sentiment: MSD Ultra 6AL at 100% against Compression Calculator's 0%. MSD Ultra 6AL also leads on rating (5.0 vs 3.0). Compression Calculator's advantage is update cadence (every 9 days vs every 14 months) and ratings volume (3 vs 1). On price, ads, in-app purchases and monetization model 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
MSD Ultra 6AL holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 3 and 1 respectively. Written reviews point the same way: 0% of Compression Calculator's written reviews are positive against 100% of MSD Ultra 6AL's.
Compression Calculator ships an update every 9 days, MSD Ultra 6AL every 14 months. The most recent releases landed on October 16, 2026 and October 24, 2026 respectively.
| Parameter | Compression Calculator | MSD Ultra 6AL |
|---|---|---|
| Price | Free | Free |
| Rating | 3.0 (3 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 0.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 3 — better | 1 |
| Update frequency | Every 9 days — better | Every 14 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 11.4 | 11.0 — better |
| Further details — not scored | ||
| Size | 10 MB | 115 MB |
| Age rating | 4+ | 4+ |
| Developer | Peter Linszter | Holley Performance Products |
Customer experience
Compression Calculator
MSD Ultra 6AL
In-app purchases
Compression Calculator
No in-app purchases
MSD Ultra 6AL
No in-app purchases
Questions
Is Compression Calculator free?
Is MSD Ultra 6AL free?
Which has better reviews, Compression Calculator or MSD Ultra 6AL?
Do Compression Calculator or MSD Ultra 6AL have ads?
Which is updated more often, Compression Calculator or MSD Ultra 6AL?
Other comparisons
