# LinkTap vs Engine Displacement Calc

The clearest difference is price: LinkTap at Free against Engine Displacement Calc's $4.99. LinkTap also leads on iOS requirement (15.5 vs 17.0). On update cadence, ads, in-app purchases and device support there is nothing between them.

LinkTap 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.

LinkTap ships an update every 5 weeks, Engine Displacement Calc every 6 weeks. The most recent releases landed on October 17, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | LinkTap | Engine Displacement Calc |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| Rating | **[3.6 (48 ratings)](https://appshunter.io/ios/app/linktap/id1137440159/reviews)** | — |
| Number of ratings | **48** | — |
| Positive reviews | 56.1% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 6 weeks |
| Monetization | Free | — |
| Size | 48 MB | 1 MB |
| Requires iOS | **15.5** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [LINKTAP PTY LTD](https://appshunter.io/developer/1137440158) | [Shanghai Sheyuan Network Technology Co., Ltd.](https://appshunter.io/developer/1560626858) |

## What reviewers say

### LinkTap

[App page](https://appshunter.io/ios/app/linktap/id1137440159)

Control your wireless water timer remotely from anywhere. Schedule watering with multiple modes, skip watering during rain, and monitor your device's status. Receive notifications and view historical data for efficient water management.

**Highlights:** Remote access anywhere, anytime, Six work modes for scheduling, Rain Skip feature, Monitor timer status, Watering notifications, View watering history, Control up to 24 timers

**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 LinkTap free?

LinkTap 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 LinkTap or Engine Displacement Calc have ads?

Neither LinkTap nor Engine Displacement Calc shows ads.

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

LinkTap ships an update every 5 weeks, and Engine Displacement Calc every 6 weeks. Most recently, LinkTap was updated on October 17, 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.*