e85Cal vs LED Performance
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
e85Cal
This app assists users in calculating the precise amounts of standard and ethanol gasoline needed to achieve a desired ethanol percentage in their fuel mix. It simplifies the process by taking into account tank size, current fuel level, and the ethanol content of available fuel types.
- Calculate ethanol percentage goal
- Enter gas tank size
- Input standard pump gas ethanol %
- Input ethanol pump gas ethanol %
- Set target ethanol % mix
- Enter current fuel level %
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e85Cal help you calculate your ethanol percentage goal. It fast, simple, and easy to use. Just enter the following information: 1) How big is your gas tank? 2) What is the ethanol % in the standard pump gas? 3) What is the ethanol % in the ethanol pump gas? 4) What is your target ethanol % mix goal? 5) What is your current ethanol % min in your vehicle? 6) What is your current fuel level % in your vehicle? Results will display how many gallons or liters of standard and ethanol gas to pump in your vehicle based on your input.
LED Performance
This app displays and records real-time driving data from your vehicle using OBD and GPS. It offers detailed insights into performance metrics and allows interaction with smart hardware for customization. Enhance your driving experience with comprehensive data analysis.
- Real-time driving data display
- OBD and GPS data integration
- Vehicle performance recording and analysis
- Smart hardware interaction
- Customizable LED colors
- Fuel consumption tracking
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LED PERFORMANCE uses OBD data, GPS data and intelligent hardware to provide users with driving data display, record and analysis. The adapted models include most of the American, German and Japanese models. Data include: vehicle speed, speed, engine load, battery voltage, oil temperature, water temperature, driving range, turbocharging, instantaneous fuel consumption, average fuel consumption, etc. At the same time, the App can interact with the intelligent hardware, such as setting LED color, time synchronization, data synchronization... . Based on the car's own data, it combines mobile apps and smart hardware to combine very interesting functions. If you want to learn more, please download the APP and join us! === EULA === [standard Apple Terms of Use (EULA)](https://www.apple.com/legal/internet-services/itunes/dev/stdeula/) [Instructions for LED Performance VIP automatic subscription service] 1. Subscription service: LED Performance VIP consecutive quarter package (3 months) 2. Subscription price: Continuous quarterly products are $24.99/season 3. Payment: After the user confirms the purchase and makes the payment, it will be credited to the iTunes account 4. The Apple iTunes account will be deducted within 24 hours before expiration. After the deduction is successful, the subscription period will be extended by one subscription period. 5. If you need to cancel the subscription, please open the "Settings"_-> enter "iTunes Store and App Store"-->Click "Apple ID", select "View Apple ID", enter the "Account Settings" page, click "Subscription", select [LED Performance] VIP to cancel the subscription. If not at least 24 hours after the end of the subscription period If you close the subscription before, this subscription will be automatically renewed. 1. Service Agreement (including continuous monthly service rules): https://api.ledsteeringwheel.com/api/user/agreement?type=1&lang=en 2. Privacy Agreement: http://api.ledsteeringwheel.com/api/user/agreement?type=2&lang=en
Screenshots
Verdict
The clearest difference is rating: e85Cal at 4.7 against LED Performance's 2.8. e85Cal also leads on in-app purchases (none vs 4) and ads (none vs shown). LED Performance's advantage is update cadence (every 5 weeks vs every 4 months). On price, device support and iOS requirement 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. LED Performance sells 4 in-app purchases, starting at $24.99 per 3 months. e85Cal asks for nothing beyond the download.
e85Cal holds the better App Store score, 4.7 against 2.8. That said, the two scores are not equally well evidenced: e85Cal has 35 ratings behind it against 6, so its average is the more settled of the two. Written reviews point the same way: 83% of e85Cal's written reviews are positive against 50% of LED Performance's.
e85Cal ships an update every 4 months, LED Performance every 5 weeks. The most recent releases landed on September 26, 2026 and September 29, 2026 respectively.
| Parameter | e85Cal | LED Performance |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (35 ratings) — better | 2.8 (6 ratings) |
| Positive reviews | 83.3% of reviews — better | 50.0% of reviews |
| Number of ratings | 35 — better | 6 |
| Update frequency | Every 4 months | Every 5 weeks — better |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 12.1 | 12.0 — better |
| Further details — not scored | ||
| Size | 15 MB | 48 MB |
| Age rating | 4+ | 17+ |
| Developer | Michael Joe | TD DYNAMICS CO., LIMITED |
Customer experience
e85Cal
LED Performance
In-app purchases
e85Cal
No in-app purchases
LED Performance
- Auto Renow 3 months VIP$24.993 Months
- One month VIP$12.99
- 3 months VIP$29.99
- 1 year VIP$99.99








