Fuel vs E85 Calculator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Fuel
Monitor your vehicle's ethanol concentration and fuel temperature in real-time. This app wirelessly connects to a compatible Bluetooth module, freeing up your device's port for simultaneous charging and monitoring. It includes an ethanol fill-up concentration calculator and customizable display views.
- Real-time ethanol concentration monitoring
- Real-time fuel temperature monitoring
- Wireless Bluetooth connectivity
- Ethanol fill-up concentration calculator
- Fahrenheit or Celsius display options
- Two display views
Read full descriptionHide full description
***Note that this app requires a custom Bluetooth module to function. Info on the module can be found here: https://fuel-it.com/products/fuel-it-bluetooth-flex-fuel-analyzer The Fuel-It ECA gives you realtime feedback from your Continental Ethanol sensor. Wireless communication frees up your device's port so you can monitor and charge at the same time. Features: Ethanol concentration monitoring Fuel temperature monitoring 2 Display Views Fuel temperature display in Fahrenheit or Celsius Ethanol fill-up concentration calculator
E85 Calculator
This application helps performance enthusiasts and flex-fuel vehicle owners precisely calculate the amounts of E85 and gasoline needed for specific ethanol percentages or octane ratings. It offers both simple and advanced modes for fuel mixing calculations, supporting metric and imperial units.
- Calculate E85 and gasoline amounts
- Target specific ethanol percentages
- Calculate by desired octane rating
- Metric and imperial unit support
- Real-time calculations
- Easy and advanced modes
Read full descriptionHide full description
E85 Calculator is your essential tool for precision fuel mixing, designed for performance enthusiasts and flex-fuel vehicle owners. KEY FEATURES: - Calculate exact amounts of E85 and gasoline needed - Target specific ethanol percentages (E30, E50, E70, E85) - Calculate by desired octane rating - Support for both metric (liters) and imperial (gallons) units - Real-time calculations with instant updates - Easy and advanced modes for different user needs EASY MODE: - Quick presets for common ethanol targets - Simple tank size selection - Intuitive slider controls for current fuel level - Basic inputs for everyday use ADVANCED MODE: - Precise control over fuel properties - Custom octane ratings input - Detailed ethanol content adjustment - Advanced fuel mixing calculations Perfect for: - Flex-fuel vehicle owners - Performance car enthusiasts - Race car tuners - Anyone mixing E85 with regular gas Get accurate calculations every time and achieve the perfect fuel blend for your vehicle's needs. Whether you're targeting a specific ethanol percentage or octane rating, E85 Calculator provides the precise measurements you need. Safe, simple, and accurate - take the guesswork out of fuel mixing with E85 Calculator.
Screenshots
Verdict
The clearest difference is rating: Fuel at 3.1 against E85 Calculator's 1.0. Fuel also leads on review sentiment (50% vs 25%) and update cadence (every 10 months vs every 29 months). 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.
Fuel holds the better App Store score, 3.1 against 1.0. That said, the two scores are not equally well evidenced: Fuel has 33 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 50% of Fuel's written reviews are positive against 25% of E85 Calculator's.
Fuel ships an update every 10 months, E85 Calculator every 29 months. The most recent releases landed on August 27, 2026 and September 8, 2026 respectively.
| Parameter | Fuel | E85 Calculator |
|---|---|---|
| Price | Free | Free |
| Rating | 3.1 (33 ratings) — better | 1.0 (2 ratings) |
| Positive reviews | 50.0% of reviews — better | 25.0% of reviews |
| Number of ratings | 33 — better | 2 |
| Update frequency | Every 10 months — better | Every 29 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 13.4 — better | 16.0 |
| Further details — not scored | ||
| Size | 20 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | Dmac Mobile Developments, LLC | Sheharyar Irfan |
Customer experience
Fuel
E85 Calculator
In-app purchases
Fuel
No in-app purchases
E85 Calculator
No in-app purchases
