Comparison

ExtCalc vs NativeScript Preview

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • Colorized formula view
  • Individual calculation sheets
  • Memorize results
  • Customizable constants pool
  • VAT calculator
  • Cloud synchronization
  • Apple Watch app
Features
Read full description

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

About

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.

Highlights
  • Live preview on device
  • Native UI element rendering
  • 2D canvas rendering
  • 3D canvas rendering
  • Cross-platform development tool
Read full description

Preview NativeScript projects on your device – from basic native user interface elements like buttons, switches and sliders, to 2d/3d canvas renderings.

Screenshots

ExtCalc4 screens
NativeScript Preview4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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.

UpkeepUpdate frequency

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.

Scorecard6 real differences · 4 level
ExtCalc versus NativeScript Preview: the parameters behind the verdict, then further details
ParameterExtCalcNativeScript Preview
PriceFreeFree
Rating4.8 (5 ratings) — better
Positive reviews0.0% of reviews19.4% of reviews — better
Number of ratings5 — better
Update frequencyEvery 5 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, Mac, Apple TV, Apple Watch, Vision Pro — betteriPhone, iPad, iPod, Vision Pro
Requires iOS18.714.0 — better
Further details — not scored
Size7 MB151 MB
Age rating4+4+
DeveloperMatthias WebernStudio LLC

Customer experience

ExtCalc

Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

NativeScript Preview

All ratings5 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews36 reviews
Positive19.4%
Neutral11.1%
Negative69.4%

In-app purchases

2 purchases

ExtCalc

Subscriptions1
  • Yearly Subscription$4.991 Year
One-time1
  • Printing$0.99
None

NativeScript Preview

No in-app purchases

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.

Other comparisons