# WidgetCal vs NumLens by OpenSquare

The clearest difference is in-app purchases: NumLens by OpenSquare at none against WidgetCal's 2. NumLens by OpenSquare also leads on update cadence (every 3 days vs every 32 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. WidgetCal sells 2 in-app purchases, starting at $0.99 per month. NumLens by OpenSquare asks for nothing beyond the download.

WidgetCal ships an update every 32 months, NumLens by OpenSquare every 3 days. The most recent releases landed on October 13, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | WidgetCal | NumLens by OpenSquare |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/widgetcal-widget-calculator/id6468929338/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 32 months | **Every 3 days** |
| Monetization | Freemium | — |
| Size | 3 MB | 20 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [杏娣 吴](https://appshunter.io/developer/1275821426) | [Ahmed Abdelkarim](https://appshunter.io/developer/1873299514) |

## What reviewers say

### WidgetCal

[App page](https://appshunter.io/ios/app/widgetcal-widget-calculator/id6468929338)

Perform calculations directly from your home screen with advanced functions. Customize your experience with multiple themes. Unlock premium features through a subscription.

**Highlights:** Home screen widget calculator, Trigonometric and calculus functions, Over 10 beautiful themes, No ads, Monthly/annual subscription for Pro features

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| WidgetCal Pro | $0.99 | per month |
| WidgetCal Pro | $3.99 | per year |


### NumLens by OpenSquare

[App page](https://appshunter.io/ios/app/numlens-by-opensquare/id6760407566)

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

**In-app purchases:** none


## Frequently asked questions

### Is WidgetCal free?

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

### Is NumLens by OpenSquare free?

NumLens by OpenSquare is free to download, with no in-app purchases.

### Do WidgetCal or NumLens by OpenSquare have ads?

Neither WidgetCal nor NumLens by OpenSquare shows ads.

### Which is updated more often, WidgetCal or NumLens by OpenSquare?

WidgetCal ships an update every 32 months, and NumLens by OpenSquare every 3 days. Most recently, WidgetCal was updated on October 13, 2026 and NumLens by OpenSquare on October 31, 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.*