# Engine Calculator Plus vs EverLine

The clearest difference is price: EverLine at Free against Engine Calculator Plus's $2.99. EverLine also leads on rating (5.0 vs 4.0) and update cadence (weekly vs every 48 months). Engine Calculator Plus's advantage is in-app purchases (none vs 1) and iOS requirement (13 vs 17.2). On ratings volume, ads and device support there is nothing between them.

EverLine is free to download; Engine Calculator Plus costs $2.99 up front. EverLine sells 1 one-off in-app purchase. Engine Calculator Plus asks for nothing beyond the download.

EverLine holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

Engine Calculator Plus ships an update every 48 months, EverLine weekly. The most recent releases landed on October 15, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | Engine Calculator Plus | EverLine |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | [4.0 (1 ratings)](https://appshunter.io/ios/app/engine-calculator-plus/id1355990764/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/everline-timeline-recording/id6741721815/reviews)** |
| Number of ratings | 1 | 1 |
| Positive reviews | 12.5% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 48 months | **Weekly** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 2 MB | 11 MB |
| Requires iOS | **13** | 17.2 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [Nitrio](https://appshunter.io/developer/321121189) | [俣 朱](https://appshunter.io/developer/1601186588) |

## 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


### EverLine

[App page](https://appshunter.io/ios/app/everline-timeline-recording/id6741721815)

Record and visualize life's moments and progress. Capture events, track growth, and document journeys with customizable timelines. Share your creations easily and sync data across devices.

**Highlights:** Record life timelines, Track growth and progress, High-definition image uploads, Customizable color schemes and icons, Custom numerical value tracking, Timeline image sharing, iCloud data sync

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Everline Lifetime Premium | $8.99 | one-time |


## Frequently asked questions

### Is Engine Calculator Plus free?

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

### Is EverLine free?

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

### Which has better reviews, Engine Calculator Plus or EverLine?

EverLine is rated higher. Engine Calculator Plus averages 4.0 out of 5 from 1 ratings, while EverLine averages 5.0 from 1 ratings.

### Do Engine Calculator Plus or EverLine have ads?

Neither Engine Calculator Plus nor EverLine shows ads.

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

Engine Calculator Plus ships an update every 48 months, and EverLine weekly. Most recently, Engine Calculator Plus was updated on October 15, 2026 and EverLine on September 20, 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.*