Roav Charger vs e85Cal
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Roav Charger
This app helps you locate your parked car using your smartphone's GPS. It also allows for quick tuning of FM radio frequencies and seamless pairing with a compatible car charger.
- Find My Car location tracking
- Fast FM radio frequency tuner
- Instant pairing with Smart Car Charger F2
- Broadcast calls, music, and navigation
- GPS location lock when engine stops
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The Roav Charger app is designed to complement the Roav Smart Car Charger F2. Easy-To-Use Features: - Find My Car - Fast FM Radio Frequency Tuner - Instantly Pair with Smart Car Charger F2 What is Roav Smart Car Charger F2? F2 is a Bluetooth FM transmitter with built-in charging capabilities. F2 pairs with your smartphone to broadcast calls, music, and navigation directions to your car's FM radio so you can hear everything using your car's speakers. How the Find My Car feature works 1. After you have paired F2 with the Roav Charger app, when you stop your engine, the Roav Charger app will lock onto your F2's GPS location automatically. 2. When you can't remember where you parked, use this app to find your way back to your car. 3. Walk in the direction the arrow points. 4. When you are close to your car, the Roav Charger app will display "Nearby". If you have any questions regarding the Roav app, please contact us at support@goroav.com.
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 ratings volume: Roav Charger at 11K against e85Cal's 37. Roav Charger also leads on iOS requirement (9.0 vs 12.1). e85Cal's advantage is review sentiment (83% vs 66%). On price, rating, update cadence and ads 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.
On the App Store both sit at effectively the same score — 4.8 for Roav Charger against 4.7 for e85Cal. That said, the two scores are not equally well evidenced: Roav Charger has 11K ratings behind it against 37, so its average is the more settled of the two. Written reviews are what separate them: 66% of Roav Charger's written reviews are positive against 83% of e85Cal's.
Roav Charger ships an update every 3 months, e85Cal every 4 months. The most recent releases landed on October 26, 2026 and October 24, 2026 respectively.
| Parameter | Roav Charger | e85Cal |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (11K ratings) — better | 4.7 (37 ratings) |
| Positive reviews | 66.4% of reviews | 83.3% of reviews — better |
| Number of ratings | 11K — better | 37 |
| Update frequency | Every 3 months — better | Every 4 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 9.0 — better | 12.1 |
| Further details — not scored | ||
| Size | 80 MB | 15 MB |
| Age rating | 4+ | 4+ |
| Developer | Power Mobile Life LLC | Michael Joe |
Customer experience
Roav Charger
e85Cal
Bugs and requests
Roav Charger
Reported bugs
3 issues- Inconsistent Bluetooth connectivity
- App unable to detect device
- Incorrect frequency range on newer models
Requested features
5 requests- Ability to turn off FM transmission
- Automatic station scanning/selection
- Voice control/Siri integration
- More advanced car battery monitoring
- Improved parking location tracking
e85Cal
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Roav Charger
No in-app purchases
e85Cal
No in-app purchases
