APE X85 vs e85Cal
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
APE X85
This application enables users to monitor and configure a Flex Fuel Conversion module for gasoline engines, allowing them to run E85 fuel. It offers advanced tuning for ethanol delivery and includes a data logger. The app is also compatible with the APE Multi-gauge module.
- Flex Fuel conversion module monitoring
- E85 fuel compatibility
- Advanced ethanol delivery tuning
- RPM range configuration
- Built-in data logger
- APE Multi-gauge module support
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The APE X85 Flex Fuel Conversion module can be used to make a standard gasoline engine vehicle operate as a Flex Fuel vehicle that can run E85, gasoline of a mixture of the two. This application allows you to monitor and configure your APE X85 Flex Fuel Conversion module. It also allows you to use the advanced tuning features that let the user tune the ethanol delivery across different RPM ranges and has a built in data logger. This app can also be used with the APE Multi-gauge module.
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.
Screenshots
Verdict
The clearest difference is rating: e85Cal at 4.7 against APE X85's 4.2. e85Cal also leads on ratings volume (35 vs 6). APE X85's advantage is review sentiment (100% vs 83%). On price, update cadence, ads and in-app purchases 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.
e85Cal holds the better App Store score, 4.7 against 4.2. 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 complicate that: 100% of APE X85's written reviews are positive against 83% of e85Cal's, so the app with the better star average is not the one people write more warmly about.
APE X85 ships an update every 8 months, e85Cal every 4 months. The most recent releases landed on September 24, 2026 and September 26, 2026 respectively.
| Parameter | APE X85 | e85Cal |
|---|---|---|
| Price | Free | Free |
| Rating | 4.2 (6 ratings) | 4.7 (35 ratings) — better |
| Positive reviews | 100.0% of reviews — better | 83.3% of reviews |
| Number of ratings | 6 | 35 — better |
| Update frequency | Every 8 months | Every 4 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 11.0 — better | 12.1 |
| Further details — not scored | ||
| Size | 25 MB | 15 MB |
| Age rating | 4+ | 4+ |
| Developer | AlternativePerformanceEng | Michael Joe |
Customer experience
APE X85
e85Cal
In-app purchases
APE X85
No in-app purchases
e85Cal
No in-app purchases
