# TuroSmart vs Engine Displacement Calc

The clearest difference is price: TuroSmart at Free against Engine Displacement Calc's $4.99. TuroSmart also leads on iOS requirement (15.0 vs 17.0). Engine Displacement Calc's advantage is update cadence (every 3 months vs every 6 months). On ads, in-app purchases and device support there is nothing between them.

TuroSmart is free to download; Engine Displacement Calc costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

TuroSmart ships an update every 6 months, Engine Displacement Calc every 3 months. The most recent releases landed on November 3, 2026 and November 9, 2026 respectively.

## The numbers

| Metric | TuroSmart | Engine Displacement Calc |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 3 months** |
| Monetization | Free | — |
| Size | 19 MB | 1 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 12+ | 4+ |
| Developer | [Turolight Inc.](https://appshunter.io/developer/1466058200) | [Shanghai Sheyuan Network Technology Co., Ltd.](https://appshunter.io/developer/1560626858) |

## What reviewers say

### TuroSmart

[App page](https://appshunter.io/ios/app/turosmart/id1466058201)

Control your home lighting remotely and simultaneously from anywhere. Schedule actions with timers and easily share device access with family members. The app facilitates quick and simple connection to your smart lighting devices.

**Highlights:** Remote lighting control, Simultaneous device management, Customizable timers, Family device sharing, Easy device connection

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

**In-app purchases:** none


### 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 TuroSmart free?

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

### Is Engine Displacement Calc free?

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

### Do TuroSmart or Engine Displacement Calc have ads?

Neither TuroSmart nor Engine Displacement Calc shows ads.

### Which is updated more often, TuroSmart or Engine Displacement Calc?

TuroSmart ships an update every 6 months, and Engine Displacement Calc every 3 months. Most recently, TuroSmart was updated on November 3, 2026 and Engine Displacement Calc on November 9, 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.*