ExtCalc vs NativeScript Preview
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ExtCalc
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.
- Colorized formula view
- Individual calculation sheets
- Memorize results
- Customizable constants pool
- VAT calculator
- Cloud synchronization
- Apple Watch app
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ExtCalc is an innovative scientific calculator that makes operating computations easy. It shows your whole formula in a colorised text view. You can have different calculation sheets for different formulas or you just use one sheet for all your formulas. Deletion and memorizing results are integrated as well. Last, but not least, it includes a customizable constants pool and a VAT calculator. All nifty features in a short list: * Individual calculation sheets, with the possibility to print them * Color highlighting * Memorizing results, e.g. via the ANS button and through the calculation sheets, get old values by tapping on them in the sheet * Many functions, even in portrait mode * Grouping (brackets) * Error proof, you can't input formulas that would lead to errors * Constants pool, easily customizable * iCloud support for synchronization between devices * VAT calculator * Apple Watch app * Cloud synchronisation to stay up-to-date on all devices * AR scene * Print calculation sheets * Dark Mode * Strong focus on accessibility * SharePlay to work in a team Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy: https://develicious-studios.de/privacy.html
NativeScript Preview
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.
- Live preview on device
- Native UI element rendering
- 2D canvas rendering
- 3D canvas rendering
- Cross-platform development tool
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Preview NativeScript projects on your device – from basic native user interface elements like buttons, switches and sliders, to 2d/3d canvas renderings.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | ExtCalc | NativeScript Preview |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.8 (5 ratings) — better |
| Positive reviews | 0.0% of reviews | 19.4% of reviews — better |
| Number of ratings | — | 5 — better |
| Update frequency | Every 5 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, Mac, Apple TV, Apple Watch, Vision Pro — better | iPhone, iPad, iPod, Vision Pro |
| Requires iOS | 18.7 | 14.0 — better |
| Further details — not scored | ||
| Size | 7 MB | 151 MB |
| Age rating | 4+ | 4+ |
| Developer | Matthias Weber | nStudio LLC |
Customer experience
ExtCalc
NativeScript Preview
In-app purchases
ExtCalc
- Yearly Subscription$4.991 Year
- Printing$0.99
NativeScript Preview
No in-app purchases









