e85Cal vs Carvene
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.
Carvene
This app offers convenient car care services while you sleep. Schedule washes, detailing, and gas fill-ups directly at your condo parking spot. Wake up to a clean, fueled car ready for your day.
- Overnight car wash and detailing
- Gas fill-up services
- Scheduled services (one-time or recurring)
- Key drop-off and retrieval system
- Before and after photo verification
- Real-time notifications
- Loyalty rewards program
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Carvene - Overnight Car Care at Your Door Wake up to a clean, fueled car. Every morning. Carvene brings professional car wash, detailing, and gas fill-up services directly to your condo parking spot while you sleep. No more weekends wasted at car washes. No more gas station stops. Just wake up to a spotless, fully-fueled vehicle, ready for your day. HOW IT WORKS 1. Book in Seconds Select your vehicle, choose services (wash, detail, or gas), and pick your schedule. One-time or recurring. 2. Drop Your Keys Leave keys in your building's lockbox before 8 PM. We notify you which box to use. 3. Sleep Soundly Our background-checked professionals service your car between 8 PM and 5 AM. Wake Up Ready 4. Retrieve keys in the morning. Your car is clean, fueled, and ready. Before and after photos await in the app. SERVICES Basic Wash - Hand wash, wheel cleaning, towel dry. Perfect for weekly maintenance. Full Detail - Interior and exterior detailing, vacuuming, windows, dashboard. Showroom-new results. Gas Fill-Up - We fill your tank. No more gas stations. FLEXIBLE SCHEDULING Every Visit - Automatic service on every building service day Weekly - Choose your day (Monday, Thursday, or Sunday) Bi-Weekly - Budget-friendly every-other-week option One-Time - Single service anytime Save 20% with recurring plans! 100% SAFE AND TRANSPARENT Photo-Verified - Before and after photos with every service Secure Keys - Timestamped lockbox tracking Background-Checked - Fully insured professionals Building Authorized - Coordinated with management FEATURES Wallet - Add funds for instant checkout. Cancellation refunds automatically added. Multiple Vehicles - Different schedules per car Loyalty Rewards - 10 washes equals 1 free Real-Time Notifications - Track every step Easy Management - Modify, skip, cancel (48-hour free cancellation) Rate Services - 5-star ratings earn rewards Live Support - 2-minute average response WHY CARVENE? Save time - No weekends at car washes Save money - 20% off subscriptions Sleep better - We work while you rest Complete trust - Photo verification, secure keys Ultimate convenience - Never think about car care GET STARTED 1. Download app 2. Select building 3. Add vehicle 4. Book first service First-time users: Code CLEAN20 for 20% off!
Screenshots
Verdict
The clearest difference is update cadence: Carvene at weekly against e85Cal's every 4 months. Carvene also leads on rating (5.0 vs 4.7). e85Cal's advantage is ratings volume (37 vs 1) and iOS requirement (12.1 vs 15.1). 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.
Carvene holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: e85Cal has 37 ratings behind it against 1, so its average is the more settled of the two.
e85Cal ships an update every 4 months, Carvene weekly. The most recent releases landed on October 24, 2026 and September 24, 2026 respectively.
| Parameter | e85Cal | Carvene |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (37 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 83.3% of reviews | — |
| Number of ratings | 37 — better | 1 |
| Update frequency | Every 4 months | Weekly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 12.1 — better | 15.1 |
| Further details — not scored | ||
| Size | 15 MB | 32 MB |
| Age rating | 4+ | 4+ |
| Developer | Michael Joe | Elite Wash |
Customer experience
e85Cal
Carvene
In-app purchases
e85Cal
No in-app purchases
Carvene
No in-app purchases
