# Scientific Calculator++ vs Countdown@

The clearest difference is price: Countdown@ at Free against Scientific Calculator++'s $2.99. Countdown@ also leads on update cadence (every 5 days vs every 38 months) and ratings volume (40K vs 21). Scientific Calculator++'s advantage is ads (none vs shown) and review sentiment (67% vs 37%). On in-app purchases there is nothing between them.

Countdown@ is free to download; Scientific Calculator++ costs $2.99 up front. Scientific Calculator++ sells 2 one-off in-app purchases and Countdown@ sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Scientific Calculator++ holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Countdown@ has 40K ratings behind it against 21, so its average is the more settled of the two. Written reviews point the same way: 67% of Scientific Calculator++'s written reviews are positive against 37% of Countdown@'s.

Scientific Calculator++ ships an update every 38 months, Countdown@ every 5 days. The most recent releases landed on October 15, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | Scientific Calculator++ | Countdown@ |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[5.0 (21 ratings)](https://appshunter.io/ios/app/scientific-calculator-plus-plus/id581543619/reviews)** | [4.7 (40K ratings)](https://appshunter.io/ios/app/countdown/id1456997268/reviews) |
| Number of ratings | 21 | **40K** |
| Positive reviews | **66.7% of reviews** | 37.1% of reviews |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 38 months | **Every 5 days** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 3 MB | 53 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | iPad | **iPhone, iPad, Apple Watch** |
| Age rating | 4+ | 12+ |
| Developer | [Dogahe](https://appshunter.io/developer/468657946) | [Wuhan Linggu Dingdang Technology Co., Ltd](https://appshunter.io/developer/612318541) |

## What reviewers say

### Scientific Calculator++

[App page](https://appshunter.io/ios/app/scientific-calculator-plus-plus/id581543619)

This powerful calculator app offers advanced functions for complex calculations, including fraction manipulation, angle conversions, and equation solving. It features a history of your calculations and a user-friendly interface designed for iPad.

**Highlights:** Calculation history, Fraction manipulation, Angle conversion (degrees, minutes, seconds), Permutation and combination calculations, LCM and GCD, Equation solver, Coordinate conversion

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| List Size Plus | $0.99 | one-time |
| Quadratic Plus | $0.99 | one-time |


### Countdown@

[App page](https://appshunter.io/ios/app/countdown/id1456997268)

Easily track important life events with stylish countdown timers. Create custom events like vacations, birthdays, and holidays. View upcoming events with a convenient widget and even count up from past milestones.

**Highlights:** Create custom event countdowns, Count up from past events, Event timeline with diary and notes, Widget for important events, Stylish event tracking

**Features:** macOS Compatibility, Family Sharing, Apple Watch app, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Countdown Premium | $4.99 | one-time |

**What reviewers like**

- 🚀 Customizable countdown
- 👍 Aesthetically pleasing
- 🎨 Ability to select background and music

**What reviewers complain about**

- 🔔 Countdown only triggers a notification, not an alarm
- 🔒 Widget functionality locked behind paywall
- 🐛 Inconsistent widget behavior
- 🔍 Limited customization options
- 💰 Paywall for basic features

**Reported bugs**

- Countdown not updating correctly
- Widget not displaying as customized
- Inability to delete past events

**Requested features**

- Ability to set countdown as alarm
- Sync countdowns across devices
- More customization options for widget
- Allow multiple countdowns in widget


## Frequently asked questions

### Is Scientific Calculator++ free?

Scientific Calculator++ costs $2.99, and also offers in-app purchases.

### Is Countdown@ free?

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

### Which has better reviews, Scientific Calculator++ or Countdown@?

Scientific Calculator++ is rated higher. Scientific Calculator++ averages 5.0 out of 5 from 21 ratings, while Countdown@ averages 4.7 from 40K ratings.

### Do Scientific Calculator++ or Countdown@ have ads?

Countdown@ shows ads; Scientific Calculator++ does not.

### Which is updated more often, Scientific Calculator++ or Countdown@?

Scientific Calculator++ ships an update every 38 months, and Countdown@ every 5 days. Most recently, Scientific Calculator++ was updated on October 15, 2026 and Countdown@ on October 19, 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.*