# eFoil vs Castrol Virtual Engineer

The clearest difference is update cadence: Castrol Virtual Engineer at monthly against eFoil's every 8 months. eFoil's advantage is iOS requirement (11.0 vs 16.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

eFoil ships an update every 8 months, Castrol Virtual Engineer monthly. The most recent releases landed on June 11, 2026 and May 18, 2026 respectively.

## The numbers

| Metric | eFoil | Castrol Virtual Engineer |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 8 months | **Monthly** |
| Monetization | Free | — |
| Size | 35 MB | 65 MB |
| Requires iOS | **11.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Minerets](https://appshunter.io/developer/580936162) | [Help Lightning, Inc](https://appshunter.io/developer/867775339) |

## What reviewers say

### eFoil

[App page](https://appshunter.io/ios/app/efoil/id1572075487)

Verify the authenticity of Petromin lubricant products by scanning eFoils. Sellers can track their eFoils, monitor accumulated rewards, and manage redemption requests.

**Highlights:** Authenticate Petromin lubricant products, Scan eFoils, Track accumulated rewards, Request redemptions, Settle redemptions

**Features:** macOS Compatibility

**In-app purchases:** none


### Castrol Virtual Engineer

[App page](https://appshunter.io/ios/app/castrol-virtual-engineer/id6474761415)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is eFoil free?

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

### Is Castrol Virtual Engineer free?

Castrol Virtual Engineer is free to download, with no in-app purchases.

### Do eFoil or Castrol Virtual Engineer have ads?

Neither eFoil nor Castrol Virtual Engineer shows ads.

### Which is updated more often, eFoil or Castrol Virtual Engineer?

eFoil ships an update every 8 months, and Castrol Virtual Engineer monthly. Most recently, eFoil was updated on June 11, 2026 and Castrol Virtual Engineer on May 18, 2026.

---

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