# calculator HD⁻ vs 倒计时

The clearest difference is rating: 倒计时 at 5.0 against calculator HD⁻'s 4.5. 倒计时 also leads on update cadence (every 3 weeks vs every 6 weeks) and iOS requirement (11.0 vs 13.0). calculator HD⁻'s advantage is ratings volume (2.5K vs 1). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. calculator HD⁻ sells 6 in-app purchases, starting at $2.99 per 3 months and 倒计时 sells 3 in-app purchases, starting at $3.99 per 7 days. Whichever you choose, the download price is not the number that matters.

倒计时 holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: calculator HD⁻ has 2.5K ratings behind it against 1, so its average is the more settled of the two.

calculator HD⁻ ships an update every 6 weeks, 倒计时 every 3 weeks. The most recent releases landed on September 23, 2026 and June 7, 2026 respectively.

## The numbers

| Metric | calculator HD⁻ | 倒计时 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (2.5K ratings)](https://appshunter.io/ios/app/calculator-hd/id1485888099/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/and/id6448464245/reviews)** |
| Number of ratings | **2.5K** | 1 |
| Positive reviews | 61.1% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 6 weeks | **Every 3 weeks** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 97 MB | 34 MB |
| Requires iOS | 13.0 | **11.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Beijing four time ledo Technology Co., Ltd.](https://appshunter.io/developer/1485888098) | [浩 陈](https://appshunter.io/developer/1680667246) |

## What reviewers say

### calculator HD⁻

[App page](https://appshunter.io/ios/app/calculator-hd/id1485888099)

A powerful and intuitive calculator app designed for simplicity and beauty. It offers a complete record of operations that can be reviewed and edited, along with scientific functions and multiple themes. Enjoy enhanced functionality with an optional subscription.

**Highlights:** Records operation process, Check and edit operations, Elegant and intuitive interface, Displays equation and result simultaneously, Supports scientific functions, Multiple themes

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| auto season vip | $2.99 | per 3 months |
| 连续年会员 | $3.99 | per year |
| 深色主题 | $0.99 | one-time |
| 周会员 | $0.99 | one-time |
| 高级会员 | $14.99 | one-time |
| 超级会员 | $14.99 | one-time |

**What reviewers like**

- 👍 Good calculator
- 🚀 Efficient calculations

**What reviewers complain about**

- 💰 Paid features
- 🔒 Locked to one device
- 🐛 Calculation errors
- 🙅‍♀️ Lack of functionality

**Reported bugs**

- Incorrect calculation results
- Compatibility issues with new devices

**Requested features**

- More customization options
- Improved user interface
- Free version without ads


### 倒计时

[App page](https://appshunter.io/ios/app/and/id6448464245)

This app helps you count down to important dates like anniversaries, birthdays, and holidays. Set reminders to never miss special moments and track your daily life with a built-in diary. It also features a community group for sharing experiences and reminders.

**Highlights:** Countdown to important dates, Set custom reminders, Track birthdays and anniversaries, Daily diary function, Built-in community group, Record special moments

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 周会员 | $3.99 | per 7 days |
| 月会员 | $9.99 | per month |
| 年会员 | $39.99 | per year |


## Frequently asked questions

### Is calculator HD⁻ free?

calculator HD⁻ is free to download, with in-app purchases available.

### Is 倒计时 free?

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

### Which has better reviews, calculator HD⁻ or 倒计时?

倒计时 is rated higher. calculator HD⁻ averages 4.5 out of 5 from 2.5K ratings, while 倒计时 averages 5.0 from 1 ratings.

### Do calculator HD⁻ or 倒计时 have ads?

Both calculator HD⁻ and 倒计时 show ads.

### Which is updated more often, calculator HD⁻ or 倒计时?

calculator HD⁻ ships an update every 6 weeks, and 倒计时 every 3 weeks. Most recently, calculator HD⁻ was updated on September 23, 2026 and 倒计时 on June 7, 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.*