E85 Calculator vs Spool Ethanol Analyzer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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
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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.
Spool Ethanol Analyzer
This application connects to a wireless sensor kit to measure in-tank ethanol content and fuel temperature. It also features a mixing ratio calculator that can be used independently of the sensor hardware.
- Connects to Spool Wireless Ethanol Sensor Kit
- Measures in-tank ethanol content
- Measures fuel temperature
- Includes mixing ratio calculator
- Uses Low energy Bluetooth protocols
- Fast and reliable data
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Spool Ethanol Analyzer is designed to connect to the Spool Wireless Ethanol Sensor Kit and/or the Spool Handheld ethanol analyzer to help determine the in-tank/pump ethanol content and fuel temperature. It incorporates the latest Low energy Bluetooth protocols and provides fast and reliable ethanol content information right on your smartphone. The App also includes a mixing ratio calculator and it can be used even if you don't have access to the Spool Wireless Ethanol Sensor Kit. The Spool Wireless Ethanol Sensor Kit can be purchased at www.spoolperformance.us
Screenshots
Verdict
The clearest difference is rating: Spool Ethanol Analyzer at 4.1 against E85 Calculator's 1.0. Spool Ethanol Analyzer also leads on review sentiment (40% vs 25%) and update cadence (every 13 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.
Spool Ethanol Analyzer holds the better App Store score, 4.1 against 1.0. That said, the two scores are not equally well evidenced: Spool Ethanol Analyzer has 14 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 25% of E85 Calculator's written reviews are positive against 40% of Spool Ethanol Analyzer's.
E85 Calculator ships an update every 29 months, Spool Ethanol Analyzer every 13 months. The most recent releases landed on October 10, 2026 and October 4, 2026 respectively.
| Parameter | E85 Calculator | Spool Ethanol Analyzer |
|---|---|---|
| Price | Free | Free |
| Rating | 1.0 (2 ratings) | 4.1 (14 ratings) — better |
| Positive reviews | 25.0% of reviews | 40.0% of reviews — better |
| Number of ratings | 2 | 14 — better |
| Update frequency | Every 29 months | Every 13 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.0 | 11.0 — better |
| Further details — not scored | ||
| Size | 3 MB | 9 MB |
| Age rating | 4+ | 4+ |
| Developer | Sheharyar Irfan | Ajay Rajeev |
Customer experience
E85 Calculator
Spool Ethanol Analyzer
In-app purchases
E85 Calculator
No in-app purchases
Spool Ethanol Analyzer
No in-app purchases
Questions
Is E85 Calculator free?
Is Spool Ethanol Analyzer free?
Which has better reviews, E85 Calculator or Spool Ethanol Analyzer?
Do E85 Calculator or Spool Ethanol Analyzer have ads?
Which is updated more often, E85 Calculator or Spool Ethanol Analyzer?
Other comparisons
