# Unit Converter and Calc vs DataCentral

The clearest difference is in-app purchases: Unit Converter and Calc at none against DataCentral's 2. Unit Converter and Calc also leads on iOS requirement (15.6 vs 17.6). DataCentral's advantage is ads (none vs shown) and update cadence (every 3 days vs every 2 months). On price, ratings volume and device support there is nothing between them.

Both are free to download. DataCentral sells 2 in-app purchases, starting at $9.99 per month. Unit Converter and Calc asks for nothing beyond the download.

DataCentral holds the better App Store score, 5.0 against 4.8. Both are backed by a comparable volume of ratings — 4 and 2 respectively. Written reviews point the same way: 80% of Unit Converter and Calc's written reviews are positive against 100% of DataCentral's.

Unit Converter and Calc ships an update every 2 months, DataCentral every 3 days. The most recent releases landed on October 24, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Unit Converter and Calc | DataCentral |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (4 ratings)](https://appshunter.io/ios/app/unit-converter-and-calc/id1617794152/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/datacentral/id6762427769/reviews)** |
| Number of ratings | **4** | 2 |
| Positive reviews | 80.0% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Every 3 days** |
| Monetization | **Ad-supported** | Freemium |
| Size | 31 MB | 34 MB |
| Requires iOS | **15.6** | 17.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Qtonz infosoft private limited](https://appshunter.io/developer/1548474074) | [Stephen Moore](https://appshunter.io/developer/1894111091) |

## What reviewers say

### Unit Converter and Calc

[App page](https://appshunter.io/ios/app/unit-converter-and-calc/id1617794152)

This app offers a comprehensive suite of conversion tools for everyday needs, including units of length, weight, temperature, and currency. It also functions as a scientific and arithmetic calculator, with specialized calculators for age, EMI, BMI, and more.

**Highlights:** Unit conversion for length, weight, temperature, volume, time, Scientific and arithmetic calculator, Real-time currency and cryptocurrency converter, Age, EMI, BMI, Percentage, GST calculators, History display for previous calculations, Floating calculator for multitasking

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

**In-app purchases:** none


### DataCentral

[App page](https://appshunter.io/ios/app/datacentral/id6762427769)

Monitor your servers, sensors, and infrastructure in real-time from your iPhone. Receive instant alerts for temperature, uptime, and power status changes. Ideal for home labs, small businesses, and colocation racks to prevent downtime.

**Highlights:** Real-time sensor readings, Customizable push notifications, Uptime and power status monitoring, Historical data and trend analysis, Modern interface for quick glances

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| DataCentral Pro Monthly | $9.99 | per month |
| DataCentral Pro Annual | $89.99 | per year |


## Frequently asked questions

### Is Unit Converter and Calc free?

Unit Converter and Calc is free to download, with no in-app purchases.

### Is DataCentral free?

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

### Which has better reviews, Unit Converter and Calc or DataCentral?

DataCentral is rated higher. Unit Converter and Calc averages 4.8 out of 5 from 4 ratings, while DataCentral averages 5.0 from 2 ratings.

### Do Unit Converter and Calc or DataCentral have ads?

Unit Converter and Calc shows ads; DataCentral does not.

### Which is updated more often, Unit Converter and Calc or DataCentral?

Unit Converter and Calc ships an update every 2 months, and DataCentral every 3 days. Most recently, Unit Converter and Calc was updated on October 24, 2026 and DataCentral on October 7, 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.*