e85Cal vs CarQR App
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.
CarQR App
Instantly receive alerts about your vehicle's status, such as lights left on or bad parking, by placing a private QR code on your car. Protect your privacy as your personal information is never shared with those who scan the code.
- Instant vehicle alerts via QR scan
- Privacy-focused, no personal info shared
- Customizable alert categories
- Printable PDF or physical sticker options
- Premium features like auto-reply and analytics
- Business and fleet management tools
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CarQR is a QR-based vehicle alert system that notifies you INSTANTLY when something is wrong with your car. Stop leaving your phone number on the dashboard: your number, name and email are never shared. HOW IT WORKS 1. Add your vehicle — a nickname is enough, plate optional. 2. Get your private QR code: print the PDF or wait for our printed sticker. 3. Place it on your car. When someone scans it, you get a push instantly. WHAT ALERTS ARRIVE? • Headlights left on, window open, door open • Bad parking / blocking the exit • Flat tire, vehicle damage, alarm going off • Emergency call — with repeated reminders PRIVACY FIRST Scanners only see predefined alert categories. Your phone number and identity are never exposed. MORE WITH PREMIUM • Custom QR sticker design with printed sticker delivery • Auto-reply and quiet hours • Monthly car scent gift GO ULTIMATE • Custom quick replies and free-text auto-reply • Alert category filtering • Extra alert recipients for your family • QR scan analytics and public page themes BUSINESS & FLEET Driver assignment, fleet alert feed and central management for rental, valet, parking and service fleets. Your car can't talk. CarQR does it for you. Terms of Use (EULA): https://carqrapp.com/legal/terms-of-use Privacy Policy: https://carqrapp.com/legal/privacy-policy
Screenshots
Verdict
The clearest difference is in-app purchases: e85Cal at none against CarQR App's 4. e85Cal also leads on iOS requirement (12.1 vs 15.0). CarQR App's advantage is update cadence (every 2 days vs every 4 months) and review sentiment (100% vs 83%). On price, ads and device support 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. CarQR App sells 4 in-app purchases, starting at $19.99 per month. e85Cal asks for nothing beyond the download.
e85Cal ships an update every 4 months, CarQR App every 2 days. The most recent releases landed on October 24, 2026 and October 10, 2026 respectively.
| Parameter | e85Cal | CarQR App |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (37 ratings) — better | — |
| Positive reviews | 83.3% of reviews | 100.0% of reviews — better |
| Number of ratings | 37 — better | — |
| Update frequency | Every 4 months | Every 2 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 12.1 — better | 15.0 |
| Further details — not scored | ||
| Size | 15 MB | 50 MB |
| Age rating | 4+ | 4+ |
| Developer | Michael Joe | TAHA BAYAR |
Customer experience
e85Cal
CarQR App
In-app purchases
e85Cal
No in-app purchases
CarQR App
- CarQR Premium Monthly$19.991 Month
- CarQR Ultimate Monthly$29.991 Month
- CarQR Premium Yearly$219.991 Year
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- CarQR Ultimate Yearly$329.991 Year
