# Calc4Key vs Site Checker

The clearest difference is rating: Calc4Key at 4.6 against Site Checker's 3.4. Calc4Key also leads on update cadence (daily vs every 2 months) and ratings volume (821 vs 12). On ads, in-app purchases and device support there is nothing between them.

Calc4Key costs $0.99 and Site Checker $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Calc4Key holds the better App Store score, 4.6 against 3.4. That said, the two scores are not equally well evidenced: Calc4Key has 821 ratings behind it against 12, so its average is the more settled of the two. Written reviews point the same way: 63% of Calc4Key's written reviews are positive against 50% of Site Checker's.

Calc4Key ships an update daily, Site Checker every 2 months. The most recent releases landed on October 14, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Calc4Key | Site Checker |
| --- | --- | --- |
| Price | **$0.99** | $1.99 |
| Rating | **[4.6 (821 ratings)](https://appshunter.io/ios/app/calc4key/id1585531759/reviews)** | [3.4 (12 ratings)](https://appshunter.io/ios/app/site-checker-down-detector/id1630945886/reviews) |
| Number of ratings | **821** | 12 |
| Positive reviews | **62.5% of reviews** | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Daily** | Every 2 months |
| Monetization | **Free** | Paid |
| Size | 9 MB | 10 MB |
| Requires iOS | **11.0** | 16.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Khang Le](https://appshunter.io/developer/1078541780) | [Tamara Dudarenko](https://appshunter.io/developer/1602845370) |

## What reviewers say

### Calc4Key

[App page](https://appshunter.io/ios/app/calc4key/id1585531759)

Perform calculations directly within your keyboard, eliminating the need to switch apps or copy-paste results. This utility allows you to calculate anywhere you type, enhancing productivity and convenience.

**Highlights:** Calculator on keyboard, Calculate anywhere, No app switching, No copy-paste results, Easy keyboard selection

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

**In-app purchases:** none


### Site Checker

[App page](https://appshunter.io/ios/app/site-checker-down-detector/id1630945886)

This app provides web tool utilities to monitor network connection stability and website availability. It includes HTTP tests for API checks and a downtime detector to verify site access globally. Useful for system administrators and web developers to troubleshoot DNS and ISP connection issues.

**Highlights:** WiFi and mobile data connection monitoring, HTTP test for REST API checks, Downtime detector for site access, Works on 3G/4G/5G/LTE and WiFi, Supports VPN and proxy servers, Troubleshoots DNS and ISP connection issues

**In-app purchases:** none


## Frequently asked questions

### Is Calc4Key free?

Calc4Key costs $0.99, with no in-app purchases.

### Is Site Checker free?

Site Checker costs $1.99, with no in-app purchases.

### Which has better reviews, Calc4Key or Site Checker?

Calc4Key is rated higher. Calc4Key averages 4.6 out of 5 from 821 ratings, while Site Checker averages 3.4 from 12 ratings.

### Do Calc4Key or Site Checker have ads?

Neither Calc4Key nor Site Checker shows ads.

### Which is updated more often, Calc4Key or Site Checker?

Calc4Key ships an update daily, and Site Checker every 2 months. Most recently, Calc4Key was updated on October 14, 2026 and Site Checker on October 12, 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.*