# Engine Calculator Plus vs STIHL connected

The clearest difference is price: STIHL connected at Free against Engine Calculator Plus's $2.99. STIHL connected also leads on update cadence (monthly vs every 48 months). Engine Calculator Plus's advantage is device support (3 vs 1) and iOS requirement (13 vs 16.6). On ads and in-app purchases there is nothing between them.

STIHL connected is free to download; Engine Calculator Plus costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Engine Calculator Plus ships an update every 48 months, STIHL connected monthly. The most recent releases landed on October 15, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Engine Calculator Plus | STIHL connected |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[4.0 (1 ratings)](https://appshunter.io/ios/app/engine-calculator-plus/id1355990764/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 12.5% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 48 months | **Monthly** |
| Monetization | Paid | — |
| Size | 2 MB | 105 MB |
| Requires iOS | **13** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Nitrio](https://appshunter.io/developer/321121189) | [STIHL Inc.](https://appshunter.io/developer/520849732) |

## What reviewers say

### Engine Calculator Plus

[App page](https://appshunter.io/ios/app/engine-calculator-plus/id1355990764)

Calculate engine specifications for various car and plane engines, including displacement, compression ratio, and horsepower. Supports metric and imperial systems with a user-friendly interface and 3D engine visualization.

**Highlights:** Engine displacement calculation, Compression ratio calculation, Horsepower estimation, Metric and Imperial support, 3D engine display, Copyable results

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

**In-app purchases:** none


### STIHL connected

[App page](https://appshunter.io/ios/app/stihl-connected-fleet-us/id6761014273)

**In-app purchases:** none


## Frequently asked questions

### Is Engine Calculator Plus free?

Engine Calculator Plus costs $2.99, with no in-app purchases.

### Is STIHL connected free?

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

### Do Engine Calculator Plus or STIHL connected have ads?

Neither Engine Calculator Plus nor STIHL connected shows ads.

### Which is updated more often, Engine Calculator Plus or STIHL connected?

Engine Calculator Plus ships an update every 48 months, and STIHL connected monthly. Most recently, Engine Calculator Plus was updated on October 15, 2026 and STIHL connected on October 8, 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.*