# e85Cal vs CarQR App

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.

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.

## The numbers

| Metric | e85Cal | CarQR App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (37 ratings)](https://appshunter.io/ios/app/e85cal/id1470313135/reviews)** | — |
| Number of ratings | **37** | — |
| Positive reviews | 83.3% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 days** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 15 MB | 50 MB |
| Requires iOS | **12.1** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Michael Joe](https://appshunter.io/developer/1132486512) | [TAHA BAYAR](https://appshunter.io/developer/6786097251) |

## What reviewers say

### e85Cal

[App page](https://appshunter.io/ios/app/e85cal/id1470313135)

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.

**Highlights:** 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 %

**Features:** macOS Compatibility

**In-app purchases:** none


### CarQR App

[App page](https://appshunter.io/ios/app/carqr-app/id6786097249)

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.

**Highlights:** 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

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| CarQR Premium Monthly | $19.99 | per month |
| CarQR Ultimate Monthly | $29.99 | per month |
| CarQR Premium Yearly | $219.99 | per year |
| CarQR Ultimate Yearly | $329.99 | per year |


## Frequently asked questions

### Is e85Cal free?

e85Cal is free to download, with no in-app purchases.

### Is CarQR App free?

CarQR App is free to download, with in-app purchases available.

### Do e85Cal or CarQR App have ads?

Neither e85Cal nor CarQR App shows ads.

### Which is updated more often, e85Cal or CarQR App?

e85Cal ships an update every 4 months, and CarQR App every 2 days. Most recently, e85Cal was updated on October 24, 2026 and CarQR App on October 10, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*