# Scientific CalcX vs Countdown App with Widget

The clearest difference is price: Countdown App with Widget at Free against Scientific CalcX's $1.99. Countdown App with Widget also leads on in-app purchases (none vs 1) and update cadence (every 2 months vs every 8 months). On ads, device support and iOS requirement there is nothing between them.

Countdown App with Widget is free to download; Scientific CalcX costs $1.99 up front. Scientific CalcX sells 1 one-off in-app purchase. Countdown App with Widget asks for nothing beyond the download.

Scientific CalcX ships an update every 8 months, Countdown App with Widget every 2 months. The most recent releases landed on September 26, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | Scientific CalcX | Countdown App with Widget |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 2 months** |
| Size | 2 MB | 79 MB |
| Requires iOS | 16.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Hangzhou Lake Snow Technology Co., Ltd.](https://appshunter.io/developer/1439688130) | [ADRIAN DANIEL PANAITE](https://appshunter.io/developer/1846610229) |

## What reviewers say

### Scientific CalcX

[App page](https://appshunter.io/ios/app/scientific-calcx/id1439688401)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Scientific CalcX Premium | $3.99 | one-time |


### Countdown App with Widget

[App page](https://appshunter.io/ios/app/countdown-app-with-widget/id6754092549)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Scientific CalcX free?

Scientific CalcX costs $1.99, and also offers in-app purchases.

### Is Countdown App with Widget free?

Countdown App with Widget is free to download, with no in-app purchases.

### Do Scientific CalcX or Countdown App with Widget have ads?

Neither Scientific CalcX nor Countdown App with Widget shows ads.

### Which is updated more often, Scientific CalcX or Countdown App with Widget?

Scientific CalcX ships an update every 8 months, and Countdown App with Widget every 2 months. Most recently, Scientific CalcX was updated on September 26, 2026 and Countdown App with Widget on September 18, 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.*