# ExtCalc vs NativeScript Preview

The clearest difference is in-app purchases: NativeScript Preview at none against ExtCalc's 2. NativeScript Preview also leads on update cadence (every 3 weeks vs every 5 months) and review sentiment (19% vs 0%). ExtCalc's advantage is device support (6 vs 4). On price and ads there is nothing between them.

Both are free to download. ExtCalc sells 2 in-app purchases, starting at $4.99 per year. NativeScript Preview asks for nothing beyond the download.

ExtCalc ships an update every 5 months, NativeScript Preview every 3 weeks. The most recent releases landed on September 9, 2026 and June 9, 2026 respectively.

## The numbers

| Metric | ExtCalc | NativeScript Preview |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.8 (5 ratings)](https://appshunter.io/ios/app/nativescript-preview/id1264484702/reviews)** |
| Number of ratings | — | **5** |
| Positive reviews | 0.0% of reviews | **19.4% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 3 weeks** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 7 MB | 151 MB |
| Requires iOS | 18.7 | **14.0** |
| Devices | **iPhone, iPad, Mac, Apple TV, Apple Watch, Vision Pro** | iPhone, iPad, iPod, Vision Pro |
| Age rating | 4+ | 4+ |
| Developer | [Matthias Weber](https://appshunter.io/developer/386132193) | [nStudio LLC](https://appshunter.io/developer/1334290003) |

## What reviewers say

### ExtCalc

[App page](https://appshunter.io/ios/app/extcalc/id386132190)

This scientific calculator offers a colorized text view for formulas, allowing for individual calculation sheets and easy memorization of results. It features a customizable constants pool, VAT calculator, and cloud synchronization for seamless use across devices. Accessibility and team collaboration are also emphasized.

**Highlights:** Colorized formula view, Individual calculation sheets, Memorize results, Customizable constants pool, VAT calculator, Cloud synchronization, Apple Watch app

**Features:** Family Sharing

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Yearly Subscription | $4.99 | per year |
| Printing | $0.99 | one-time |


### NativeScript Preview

[App page](https://appshunter.io/ios/app/nativescript-preview/id1264484702)

Instantly preview your NativeScript projects directly on your mobile device. See your native UI elements, from buttons to complex 2D/3D canvas renderings, come to life as you develop.

**Highlights:** Live preview on device, Native UI element rendering, 2D canvas rendering, 3D canvas rendering, Cross-platform development tool

**In-app purchases:** none


## Frequently asked questions

### Is ExtCalc free?

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

### Is NativeScript Preview free?

NativeScript Preview is free to download, with no in-app purchases.

### Do ExtCalc or NativeScript Preview have ads?

Neither ExtCalc nor NativeScript Preview shows ads.

### Which is updated more often, ExtCalc or NativeScript Preview?

ExtCalc ships an update every 5 months, and NativeScript Preview every 3 weeks. Most recently, ExtCalc was updated on September 9, 2026 and NativeScript Preview on June 9, 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.*