HONDAtabase vs Racing Diffs
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
HONDAtabase
Access detailed specifications for various Honda engine series, including A-, B-, C-, D-, F-, G-, H-, J-, K-, L-, N-, and R-Series. It also provides OBD0/OBD1/OBD2 ECU fault codes, transmission specs, ECU pinouts, and a bearing thickness chart.
- Honda engine series specifications
- OBD ECU fault codes
- Transmission specifications
- ECU list and pinouts
- Bearing thickness chart
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Honda™ Automotive Database - A-, B-, C-, D-, F-, G-, H-, J-, K-, L-, N-, R-Series Engine Specifications - OBD0/OBD1/OBD2 ECU Fault Codes - Transmission Specifications - ECU List - Bearing thickness chart - ECU pinouts 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.
Racing Diffs
Calculate your vehicle's top speed for each gear using transmission ratios, differential gear ratio, and rev limit. Optimize your car's gear ratio for track performance or drag racing, choosing between kmh and mph units.
- Top speed calculation per gear
- Input tire dimensions
- Input transmission gear ratios
- Input final drive ratio
- Input rev limit
- Supports kmh and mph
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This application provides accurate top speed calculations based on your transmission ratios and differential gear ratio. It gives you information about maximal speed by each gear. Variables that you need to fill are: Tire dimension Transmission gear ratios Final drive ratio REV limit You can also choose between kmh and mph. The info provided by this app is crucial for any track and motorsport enthusiast who wishes to optimize the car's gear ratio to best suit a particular track. It helps you to find the perfect balance between top speed and acceleration which is also the key point for drag racers.
Screenshots
Verdict
The clearest difference is rating: HONDAtabase at 4.6 against Racing Diffs's 2.5. HONDAtabase also leads on ratings volume (32 vs 2). Racing Diffs's advantage is ads (none vs shown). On price, update cadence, 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.
HONDAtabase holds the better App Store score, 4.6 against 2.5. That said, the two scores are not equally well evidenced: HONDAtabase has 32 ratings behind it against 2, so its average is the more settled of the two.
HONDAtabase ships an update every 3 weeks, Racing Diffs every 5 weeks. The most recent releases landed on October 24, 2026 and October 13, 2026 respectively.
| Parameter | HONDAtabase | Racing Diffs |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (32 ratings) — better | 2.5 (2 ratings) |
| Positive reviews | 72.7% of reviews | — |
| Number of ratings | 32 — better | 2 |
| Update frequency | Every 3 weeks — better | Every 5 weeks |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 14.4 — better |
| Further details — not scored | ||
| Size | 93 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | Peter Linszter | Imperio |
Customer experience
HONDAtabase
Racing Diffs
In-app purchases
HONDAtabase
No in-app purchases
Racing Diffs
No in-app purchases
Questions
Is HONDAtabase free?
Is Racing Diffs free?
Which has better reviews, HONDAtabase or Racing Diffs?
Do HONDAtabase or Racing Diffs have ads?
Which is updated more often, HONDAtabase or Racing Diffs?
Other comparisons
