Race Buddy vs Log Dyno
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Race Buddy
This app transforms your device into a professional racing performance analyzer. It offers GPS lap timing, drag racing measurements, and video data overlay for automotive enthusiasts. Track your performance, compare with others globally, and analyze your runs with detailed telemetry.
- Drag racing and acceleration testing
- GPS lap timing with sector splits
- Video recording with telemetry overlay
- Density altitude calculations
- Online leaderboards and community
- Vehicle management profiles
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Time your laps. Measure acceleration. See where you can improve. RaceBuddy brings lap timing, drag results, performance analysis and video overlays together for closed-course driving. LAP TIMING AND ANALYSIS • Record lap times and sector splits on circuits worldwide. • Follow live delta timing and compare laps to find where time is gained or lost. • Review your racing line, speed and session history. DRAG AND ACCELERATION • Measure 0–60 mph, 0–100 km/h, quarter-mile and rolling acceleration. • Review run graphs, slope and conditions alongside your results. • Compare runs and follow DIFF time or predicted quarter-mile ET with PRO and compatible external GPS. VIDEO WITH YOUR DATA • Record driving video and export it with synchronized telemetry. • Show speed, lap times, G-forces and track position. • PRO adds custom layouts, portrait output and export up to 4K. POWER AND ENGINE DATA • Estimate power and torque from a GPS run with PRO. Results depend on measurement conditions and vehicle settings. • Record supported OBD-II channels, such as RPM and throttle, with PRO and a compatible adapter. • Keep vehicle profiles and compare your performance over time. CHOOSE YOUR GPS SOURCE RaceBuddy ONE, Dragy, Dragy Pro, RaceBox Mini, Mini S, Micro, RaceBox.cc and RaceHF are supported. An external GPS receiver is recommended for greater timing precision. Phone Mode is also available using your iPhone’s GPS and sensors. Its timing precision is limited. DIFF time and predicted ET require compatible external GPS. FREE AND PRO Free includes Phone Mode, connection to RaceBuddy ONE, lap and drag timing, session history, VBO export and 1080p landscape video overlay export, subject to the GPS-source limitations above. PRO adds third-party GPS connections, run and lap comparison, Power & Torque, OBD telemetry, advanced video layouts and export options, and custom track creation. A compatible GPS receiver or OBD adapter is required for the corresponding hardware features. PRO is available as a monthly or yearly subscription, or a one-time Lifetime purchase. See the app for current offers and terms. For closed-course use only: circuits, drag strips and autocross courses. Not for street racing. Terms of use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Log Dyno
This app analyzes your car's datalog files to measure torque and horsepower using your mobile device. It provides detailed analysis, recommends optimal gear shifts, and allows comparison of multiple measurements.
- Measure torque and horsepower from datalogs
- Virtual dyno analysis
- Optimal gear shift recommendations
- Compare multiple measurements
- Supports various datalog file formats
- Customizable vehicle data input
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Measuring your car's torque and horsepower has never been easier, now that you can do it with the help of your mobile device and this digital Dyno. You just need to open your datalog of a pull, and Log Dyno will do the rest. You can send your CSV file from your email, browser, or any app to Log Dyno which will Open the datalog from the app right away and give you a measurement, or you can save your CSV file to the Log Dyno folder in your Files app, for easy access from the in-app file browser. You can use any CSV or MSL file that contains RPM data which is needed to accurately measure Horsepower and Torque. From the torque curve and gear ratios, the app will also recommend optimal gear shift points for each gear to ensure maximum acceleration. This makes sure you know when to shift, so you always have the most possible power at the wheels. Corrections: ● Uncorrected ● SAE J1349 ● STD ● DIN 70020 ● ISO 1585 Power Units: ● WHP ● BHP ● PS ● KW Torque Units: ● LB-FT ● NM Either at the wheels or at the crank Compare multiple measurements! You can save each one of your Dyno measurements, and compare them, or just analyze them interactively. What datalog files can be used? ● JB4 ● MHD ● ProTool ● COBB ● MegaSquirt ● ProTool ● Bootmod3 ● and any other CSV file This is the easiest way to have your torque and horsepower measured with a virtual dyno using only your mobile phone and your datalog. You can see if your mods or tune work right away, and compare them. Log Dyno has been compared to multiple real life dyno sheets, and measurements were spot on, with multiple different vehicles How does it work? #1. Datalog your vehicle Take the log just like a dyno pull, in one given gear, from low rpm to high rpm. Try to avoid wheelspin as it can cause spikes in the graph. #2. Set up your vehicle data The dyno app requires some data about your vehicle. You’ll be asked to set values for the following: ● Car Name ● Weight ● Tank Capacity ● Tire Size ● DT% ● Drag Coefficient ● Frontal Area #3. Share the results! You can share your results right from the virtual dyno measurement page to basically any app or post it to any social network or email it. Of course, you can just save the results in your phone gallery too. How accurate is the dyno measurement? If you have set your vehicle data correctly, the results our dyno app gives will be the same as the results a real dyno will give you. Also, keep in mind that wheelspin may result in spikes in the graph. If you are unable to avoid it, you’ll still get accurate results, you just need to ignore the spikes. The best thing about our dyno app is that you can see right away how your mods work after datalogging. Now, you don't have to go to the dyno if you want to measure any small modification or just never had your car's power measured. You can see right away how your mods or tune work after datalogging. You can dyno unlimited times and unlimited vehicles for the fraction of the price of a dyno measurement. You have to set your car up, how much it weighs, its tire size, the gear ratios, and also what your car drag coefficient and frontal area are, which the app will help in determining. After specifying for which gear you had the datalog taken and specifying the driver, passenger, and possible cargo weight, you can open the CSV or MSL file. Based on your car data and environmental values, the app generates a torque and horsepower curve, which you can analyze. The app also points out the peak values, and you will be able to see at what rpm you made the most torque and the most power. If you have any questions feel free to send an email: profisoftgames@gmail.com
Screenshots
Verdict
The clearest difference is price: Race Buddy at Free against Log Dyno's $13.99. Race Buddy also leads on review sentiment (43% vs 15%) and update cadence (every 3 weeks vs every 4 months). Log Dyno's advantage is in-app purchases (none vs 10) and iOS requirement (9.0 vs 17.0). On ratings volume, ads 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
Race Buddy is free to download; Log Dyno costs $13.99 up front. Race Buddy sells 10 in-app purchases, starting at $1.99 per month. Log Dyno asks for nothing beyond the download.
Race Buddy holds the better App Store score, 3.7 against 3.4. Both are backed by a comparable volume of ratings — 12 and 10 respectively. Written reviews point the same way: 43% of Race Buddy's written reviews are positive against 15% of Log Dyno's.
Race Buddy ships an update every 3 weeks, Log Dyno every 4 months. The most recent releases landed on October 29, 2026 and October 24, 2026 respectively.
| Parameter | Race Buddy | Log Dyno |
|---|---|---|
| Price | Free — better | $13.99 |
| Rating | 3.7 (12 ratings) — better | 3.4 (10 ratings) |
| Positive reviews | 42.9% of reviews — better | 15.4% of reviews |
| Number of ratings | 12 — better | 10 |
| Update frequency | Every 3 weeks — better | Every 4 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases — better | Paid |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 17.0 | 9.0 — better |
| Further details — not scored | ||
| Size | 131 MB | 128 MB |
| Age rating | 4+ | 4+ |
| Developer | Imperio | Adam Keninger |
Customer experience
Race Buddy
Log Dyno
In-app purchases
Race Buddy
- RaceBuddy Pro Monthly$1.991 Month
- RaceBuddy Pro Monthly$4.991 Month
- Drag & Laptimer PRO Monthly$6.991 Month
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- RaceBuddy Pro Annually$8.991 Year
- RaceBuddy Pro Yearly7 Days trial$19.991 Year
- Drag & Laptimer PRO Yearly7 Days trial$49.991 Year
- Custom branding$2.99
- External GPS$9.99
- RaceBuddy Lifetime PRO$29.99
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- Lifetime PRO$89.99
Log Dyno
No in-app purchases









