Best Flex Fuel Apps

220+ iOS apps curated and reviewed

4.5 avg rating
20 free apps
Updated June 2026

Every iPhone needs a few good flex fuel apps. We benchmark 220+ of them on App Store rating, freshness, and pricing, then surface the standouts so you don't have to scroll the App Store yourself.

Top Picks for Flex Fuel

E85 Stations USA#1

E85 Stations USA by Qvyshift LLC

Locate E85 fueling stations
Editor's Choice
🗺️ Navigation
4.7😊(1.7K ratings)
FreeAdsIn-App Purchases
E85 Stations USA screenshot 1
E85 Stations USA screenshot 2
E85 Stations USA screenshot 3
E85 Stations USA screenshot 4
E85 Stations USA screenshot 5

Easily locate E85 fueling stations across the United States and Canada. This app provides directions and contact information for stations offering this ethanol-gasoline blend, ideal for flex fuel vehicles. No registration is needed to access this valuable data.

What We Love

  • 👍 Useful database
  • 👍 Great app
  • 👍 Highly recommended
  • 👍 Pretty accurate

Room to Improve

  • ❌ Not accurate
  • ❌ Upgrade issues
  • ❌ Incorrect information
eFlexApp#2

eFlexApp by StepOne Tech Ltd

Monitor your eFlexFuel Device!
Strong Contender
🔧 Utilities
3.4(8 ratings)
Free
eFlexApp screenshot 1
eFlexApp screenshot 2
eFlexApp screenshot 3
eFlexApp screenshot 4
eFlexApp screenshot 5
eFlexApp screenshot 6

Monitor your eFlexFuel device in real-time, with features varying by device version. Adjust settings like language, temperature units, and theme. Track ethanol content, engine temperature, and more, depending on your specific eFlexFuel model.

Propel Fuels Station Locator#3

Propel Fuels Station Locator by Propel Fuels, Inc.

E85 & Diesel HPR, West Coast
Worth Considering
✈️ Travel
4.4(98 ratings)
FreeAds
Propel Fuels Station Locator screenshot 1
Propel Fuels Station Locator screenshot 2
Propel Fuels Station Locator screenshot 3
Propel Fuels Station Locator screenshot 4
Propel Fuels Station Locator screenshot 5

Locate stations offering E85 and Diesel High Performance Renewable fuels on the West Coast. View current prices, get driving directions, and track your carbon footprint. Check vehicle compatibility and learn about fuel benefits.

More Flex Fuel apps to explore

4
Pearson Fuels - E85 Stations
Pearson Fuels - E85 Stations
Pearson Fuels - E85 Stations
E85 Flex Fuel for California
Free

Discover E85 Flex Fuel stations across California. View real-time pricing, find nearby locations, and check vehicle compatibility. Stay informed about new stations, events, and promotions.

Locate E85 Flex Fuel stationsView real-time station pricesCheck vehicle compatibility
✈️ Travel
(132)
free
5
Alternative Fueling Stations
Alternative Fueling Stations
Alternative Fueling Stations
by National Renewable Energy Laboratory
Free

Discover nearby fueling stations for alternative energy sources like electricity, natural gas, and biofuels. View station details, including payment options, access, and specific fuel types, all sourced from a comprehensive U.S. Department of Energy database.

Locate alternative fueling stationsUse current or custom locationView stations on map or list
🗺️ Navigation
(6.4K)
free
6
E85 Search
E85 Search
E85 Search
Find E85 Gas Stations Near You
Free

Easily locate E85 fuel stations with integrated mapping and offline access. Calculate precise fuel blends for your flex-fuel vehicle to optimize performance and cost. Nearly 5,000 stations are available.

Locate E85 fuel stationsOffline station dataIntegrated mapping (Apple Maps, Google Maps, Waze)
🗺️ Navigation
(1)
free
7
PROFLEX Connect
PROFLEX Connect
PROFLEX Connect
Advanced Fuel Dynamics
Free

This app allows you to monitor your vehicle's fuel system performance in real-time. It displays device settings and helps locate nearby E85 fuel stations for convenient ethanol blending.

Real-time device setting displayE85 station locatorFuel ratio monitoring
🔧 Utilities
(54)
free
8
e85Cal
e85Cal
e85Cal
by Michael Joe
Free

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 goalEnter gas tank sizeInput standard pump gas ethanol %
🔧 Utilities
(35)
free
9
KTuner FlexFuel
KTuner FlexFuel
KTuner FlexFuel
Ethanol content display
Free

This utility app connects to specific hardware units via Bluetooth to display real-time ethanol content and temperature. It provides essential data for users monitoring fuel mixtures.

Bluetooth BLE connectivityReal-time ethanol content displayReal-time temperature display
🔧 Utilities
(1)
free
10
Fuel Rewards® program
Fuel Rewards® program
Fuel Rewards® program
by Excentus
Free

Save money on fuel with a free loyalty program. Earn rewards on purchases, dining, and travel to get discounts on every fill-up at participating stations. Track your savings and find nearby locations.

Track rewards balance and tier statusActivate offersLink credit/debit cards for earning
🛍️ Shopping
(653K)
free
11
Pure Gas
Pure Gas
Pure Gas
find e0, ethanol-free fuel
Free

Locate nearby stations offering ethanol-free gasoline. View a list sorted by distance or use the map to find stations anywhere. Track fuel mileage, trip distance, price, and type for each fill-up, assigning records to specific vehicles.

Locate ethanol-free gas stationsSort stations by distanceMap view for station discovery
🗺️ Navigation
(2.9K)
free with in-app purchases
12
Connecticut Natural Gas
Connecticut Natural Gas
Connecticut Natural Gas
by AVANGRID, INC
Free

Manage your utility account with ease. This free application allows you to quickly view and pay your bills, set up automatic payments, and enroll in budget billing. Access your account information and update your profile securely from anywhere.

Pay bill in three clicksSecure Touch/Face ID loginView account real-time
💼 Business
(2.2K)
free
13
AtoB: Find and Save on Fuel
AtoB: Find and Save on Fuel
AtoB: Find and Save on Fuel
Make an impact on fuel costs
Free

This app helps users find significant discounts on diesel and unleaded fuel at various stations. It offers route planning with discount optimization and seamless navigation integration. Additionally, it provides robust fleet management tools for controlling spending and managing finances.

Fuel discounts on diesel and unleadedFuel discount station locatorRoute planning with discount optimization
🗺️ Navigation
(2.3K)
free
14
Texaco
Texaco
Texaco
Earn Rewards. Save on Fuel.
Free

Pay for fuel directly from your car and earn rewards on purchases. Access exclusive offers, track your progress, and find participating stations. Save on gas and diesel with a seamless payment experience.

Mobile fuel paymentEarn rewards pointsRedeem fuel discounts
🗺️ Navigation
(11K)
free with in-app purchases
15
E85 App
E85 App
E85 App
Best E85 App !!!
Free

Find E85 gas stations nearby and calculate E85 fuel mixtures. This tool is designed for car enthusiasts who use or are interested in E85 fuel.

E85 gas station locatorE85 mix calculatorLocation-based search
🔧 Utilities
(17)
free with in-app purchases
16
Upside: Gas & Food Cash Back
Upside: Gas & Food Cash Back
Upside: Gas & Food Cash Back
Shop & earn on grocery & fuel
Free

Earn cash back on everyday purchases like gas, groceries, and dining. Simply claim offers in the app, pay as usual, and get rewards directly to your bank account or as gift cards. Save money on essential spending and enjoy more of what you love.

Earn cash back on gas, groceries, and diningOver 100,000 participating locationsAverage 8% cash back on groceries and dining
✈️ Travel
(667K)
free with in-app purchases
17
TSD Open Roads
TSD Open Roads
TSD Open Roads
RV Diesel Discount Program
Free

Discover the best RV fuel discounts conveniently located near you. This program offers updated pricing information based on real fuel transactions, helping RV enthusiasts save money on every fill-up.

Find nearby RV fuel discountsUpdated fuel pricing informationSave on every fill-up
✈️ Travel
(974)
free
18
Fleet SmartHub
Fleet SmartHub
Fleet SmartHub
by WEX, Inc.
Free

Manage your fleet's fuel cards with ease. Monitor driver purchases to spot misuse, control card status, and ensure timely bill payments. Keep track of available credit to prevent service disruptions.

Monitor driver purchasesTerminate/re-issue cardsCheck card status
💼 Business
(8.4K)
free
19
Journie Rewards & SpeedPay
Journie Rewards & SpeedPay
Journie Rewards & SpeedPay
by Alias Payments, Inc.
Free

Earn rewards on fuel purchases at participating stations and pay for gas securely using your phone. Enjoy a fast, easy, and secure payment experience with bank-level encryption. Get a welcome bonus and start earning points on every liter purchased.

Earn rewards on fuel purchasesPay for fuel from your phoneFast and easy payment process
🔧 Utilities
(9.5K)
free
20
DRIVEN FOR FUELMAN®
DRIVEN FOR FUELMAN®
DRIVEN FOR FUELMAN®
Fleet management on-the-go.
Free

This app empowers drivers and fleet managers to optimize fuel expenses and manage fleet accounts from their mobile devices. Drivers can locate the cheapest fuel, view discounts, and get directions, while managers can handle payments, card orders, and user profiles.

Find fuel locationsView fuel prices and discountsGet directions to fueling stations
💼 Business
(1.2K)
free

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