# Clock Widget vs Radiator Calculator Pro

The clearest difference is review sentiment: Clock Widget at 57% against Radiator Calculator Pro's 0%. Clock Widget also leads on update cadence (fortnightly vs every 3 months) and monetization model (ad-supported vs paid). Radiator Calculator Pro's advantage is ads (none vs shown). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Clock Widget sells 1 one-off in-app purchase and Radiator Calculator Pro sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Clock Widget ships an update fortnightly, Radiator Calculator Pro every 3 months. The most recent releases landed on October 24, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Clock Widget | Radiator Calculator Pro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (53 ratings)](https://appshunter.io/ios/app/clock-widget-ultra-hd-time/id6479944667/reviews)** | — |
| Number of ratings | **53** | — |
| Positive reviews | **57.1% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Fortnightly** | Every 3 months |
| Monetization | **Ad-supported** | Paid |
| Size | 50 MB | 16 MB |
| Requires iOS | **15.0** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 12+ | 4+ |
| Developer | [旭 林](https://appshunter.io/developer/509045850) | [DigitalKind Ltd](https://appshunter.io/developer/1557937157) |

## What reviewers say

### Clock Widget

[App page](https://appshunter.io/ios/app/clock-widget-ultra-hd-time/id6479944667)

Enhance your home screen with customizable clock widgets. Display current time, countdowns to special events, and a monthly calendar. Personalize backgrounds with photos, choose text colors, and add motivational quotes for a stylish and functional display.

**Highlights:** Flip clock display, Event countdowns, Monthly calendar view, Custom photo backgrounds, Adjustable text colors, Inspirational quotes

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| VIP | $2.99 | one-time |


### Radiator Calculator Pro

[App page](https://appshunter.io/ios/app/radiator-calculator-pro/id6743349772)

Accurately calculate the heating requirements for any room in your home. This tool supports unlimited rooms, offers precise calculations in Watts and BTU, and features a clean, intuitive design with dark mode support.

**Highlights:** Calculate heating requirements, Support for all room types, Precise Watts and BTU output, Unlimited room saving, Intuitive user interface, Dark mode support

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Radiator Calculator PRO | $3.99 | one-time |


## Frequently asked questions

### Is Clock Widget free?

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

### Is Radiator Calculator Pro free?

Radiator Calculator Pro is free to download, with in-app purchases available.

### Do Clock Widget or Radiator Calculator Pro have ads?

Clock Widget shows ads; Radiator Calculator Pro does not.

### Which is updated more often, Clock Widget or Radiator Calculator Pro?

Clock Widget ships an update fortnightly, and Radiator Calculator Pro every 3 months. Most recently, Clock Widget was updated on October 24, 2026 and Radiator Calculator Pro on October 28, 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.*