# Unit Converter ++ vs Calendar Clock

The clearest difference is price: Unit Converter ++ at Free against Calendar Clock's $0.99. Unit Converter ++ also leads on update cadence (every 9 months vs every 41 months) and review sentiment (20% vs 0%). Calendar Clock's advantage is ads (none vs shown). On in-app purchases and device support there is nothing between them.

Unit Converter ++ is free to download; Calendar Clock costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Unit Converter ++ ships an update every 9 months, Calendar Clock every 41 months. The most recent releases landed on August 14, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | Unit Converter ++ | Calendar Clock |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | **[1.6 (10 ratings)](https://appshunter.io/ios/app/unit-converter-plus-plus/id911329028/reviews)** | — |
| Number of ratings | **10** | — |
| Positive reviews | **20.0% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 9 months** | Every 41 months |
| Monetization | **Ad-supported** | Paid |
| Size | 6 MB | 4 MB |
| Requires iOS | **11.0** | 26.5 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Nirav Patel](https://appshunter.io/developer/787086013) | [Systemiko Inc.](https://appshunter.io/developer/680630947) |

## What reviewers say

### Unit Converter ++

[App page](https://appshunter.io/ios/app/unit-converter-plus-plus/id911329028)

Easily convert between various units of measurement for length, weight, temperature, volume, and more. This offline tool is designed for travelers, students, and professionals needing quick conversions.

**Highlights:** Converts length, weight, temperature, volume, and more, Supports numerous units of measurement, Works offline, Useful for travelers, students, and professionals, Covers speed, area, pressure, power, and energy units

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

**In-app purchases:** none


### Calendar Clock

[App page](https://appshunter.io/ios/app/calendar-clock/id1451445740)

This app displays the current year, month, week, and time on a single screen with a clean design. It offers customizable theme colors and functions as a desk clock. The app disables device sleep mode while active.

**Highlights:** All-in-one screen display, Year, month, week, day, hour, minute, second, Switchable theme colors (dark, light, green, blue), Disables device sleep mode, Acts as a desk clock

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Unit Converter ++ free?

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

### Is Calendar Clock free?

Calendar Clock costs $0.99, with no in-app purchases.

### Do Unit Converter ++ or Calendar Clock have ads?

Unit Converter ++ shows ads; Calendar Clock does not.

### Which is updated more often, Unit Converter ++ or Calendar Clock?

Unit Converter ++ ships an update every 9 months, and Calendar Clock every 41 months. Most recently, Unit Converter ++ was updated on August 14, 2026 and Calendar Clock on September 10, 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.*