# Control+ Security & Protection vs Engine Displacement Calc

The clearest difference is price: Control+ Security & Protection at Free against Engine Displacement Calc's $4.99. Control+ Security & Protection also leads on update cadence (every 2 weeks vs every 6 weeks) and iOS requirement (15.6 vs 17.0). Engine Displacement Calc's advantage is in-app purchases (none vs 15). On ads and device support there is nothing between them.

Control+ Security & Protection is free to download; Engine Displacement Calc costs $4.99 up front. Control+ Security & Protection sells 12 in-app purchases, starting at $19.99 per month. Engine Displacement Calc asks for nothing beyond the download.

Control+ Security & Protection ships an update every 2 weeks, Engine Displacement Calc every 6 weeks. The most recent releases landed on October 21, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | Control+ Security & Protection | Engine Displacement Calc |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| Rating | **[4.5 (1.5K ratings)](https://appshunter.io/ios/app/control-plus-security-and-protection/id6739730555/reviews)** | — |
| Number of ratings | **1.5K** | — |
| Positive reviews | 70.5% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 6 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 69 MB | 1 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [National Cyber Shield](https://appshunter.io/developer/1533411663) | [Shanghai Sheyuan Network Technology Co., Ltd.](https://appshunter.io/developer/1560626858) |

## What reviewers say

### Control+ Security & Protection

[App page](https://appshunter.io/ios/app/control-plus-security-and-protection/id6739730555)

This app acts as your online financial security guard, instantly verifying website legitimacy before you enter payment details. It uses AI to detect and alert you about fake shopping sites, bank account scams, and fraudulent charges, helping you shop online with confidence and protect your savings.

**Highlights:** AI-powered website legitimacy checks, Real-time scam alerts, Protection against fake shopping sites, Bank account scam detection, Fraudulent charge prevention, Automatic online transaction analysis

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

**In-app purchases (12)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Control+ | $19.99 | per month |
| Control+ | $39.99 | per 3 months |
| Control+ Protection | $59.99 | per 3 months |
| Control+ | $64.99 | per 6 months |
| Control+ | $99.99 | per year |
| Control+ Protection | $99.99 | per 6 months |
| Dev Family Protection Add-on | $37.99 | one-time |
| Family Protection Add-on | $37.99 | one-time |
| Dev Family Protection Add-on | $59.99 | one-time |
| Family Protection Add-on | $59.99 | one-time |
| Dev Family Protection Add-on | $97.99 | one-time |
| Family Protection Add-on | $97.99 | one-time |


### Engine Displacement Calc

[App page](https://appshunter.io/ios/app/engine-displacement-calc/id6761711493)

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

**In-app purchases:** none


## Frequently asked questions

### Is Control+ Security & Protection free?

Control+ Security & Protection is free to download, with in-app purchases available.

### Is Engine Displacement Calc free?

Engine Displacement Calc costs $4.99, with no in-app purchases.

### Do Control+ Security & Protection or Engine Displacement Calc have ads?

Neither Control+ Security & Protection nor Engine Displacement Calc shows ads.

### Which is updated more often, Control+ Security & Protection or Engine Displacement Calc?

Control+ Security & Protection ships an update every 2 weeks, and Engine Displacement Calc every 6 weeks. Most recently, Control+ Security & Protection was updated on October 21, 2026 and Engine Displacement Calc on October 18, 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.*