# Scientific Timer vs CalculatorX

The clearest difference is price: CalculatorX at Free against Scientific Timer's $0.99. CalculatorX also leads on update cadence (every 6 days vs every 16 months) and device support (3 vs 1). Scientific Timer's advantage is in-app purchases (none vs 1). On ads there is nothing between them.

CalculatorX is free to download; Scientific Timer costs $0.99 up front. CalculatorX sells 1 one-off in-app purchase. Scientific Timer asks for nothing beyond the download.

Scientific Timer ships an update every 16 months, CalculatorX every 6 days. The most recent releases landed on October 2, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Scientific Timer | CalculatorX |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | — | **[4.0 (2 ratings)](https://appshunter.io/ios/app/calculatorx-smartcustomize/id6755351007/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 92.9% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 16 months | **Every 6 days** |
| Monetization | — | Free |
| Size | 8 MB | 12 MB |
| Requires iOS | 18.0 | **15.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [Stephane Boutet](https://appshunter.io/developer/1794014850) | [学良 靳](https://appshunter.io/developer/1791452413) |

## What reviewers say

### Scientific Timer

[App page](https://appshunter.io/ios/app/scientific-timer/id6741395405)

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

**In-app purchases:** none


### CalculatorX

[App page](https://appshunter.io/ios/app/calculatorx-smartcustomize/id6755351007)

A fast and customizable calculator app that allows users to personalize themes, button styles, and view calculation history in real-time. Offers various display options and sound feedback for an enhanced user experience.

**Highlights:** Real-time calculation history, Customizable button colors and shapes, Multiple themes and light/dark modes, Decimal precision control, Exportable calculation history, Sound effects and voice feedback

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime Premium | $2.99 | one-time |


## Frequently asked questions

### Is Scientific Timer free?

Scientific Timer costs $0.99, with no in-app purchases.

### Is CalculatorX free?

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

### Do Scientific Timer or CalculatorX have ads?

Neither Scientific Timer nor CalculatorX shows ads.

### Which is updated more often, Scientific Timer or CalculatorX?

Scientific Timer ships an update every 16 months, and CalculatorX every 6 days. Most recently, Scientific Timer was updated on October 2, 2026 and CalculatorX on October 12, 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.*